Consulta: subjectFacets:"Hybridization"
Registros recuperados: 70
Data/hora: 12/06/2024 15:52:31

Comparative cytogenetic studies of Bufo ictericus, B. paracnemis (Amphibia, Anura) and an intermediate form in sympatry
Provedor de dados: Genetics and Molecular Biology
Autores: Azevedo,MFC; Foresti,F.; Ramos,PRR; Jim,J.
Specimens of Bufo ictericus, Bufo paracnemis and a third type, considered an intermediate subgroup between these species, were cytogenetically studied by conventional Giemsa staining, C-banding and staining of the nucleolus organizer region (NOR). The nuclear DNA content and seroproteins were also analyzed to characterize these species, and verify the possibility of hybridization between them. Karyotypes and cytogenetic markers were essentially equal on the basis of the methods used. The DNA nuclear content found was 6.25 ± 0.30 pg/DNA in Bufo ictericus; 7.57 ± 0.40 pg/DNA in Bufo paracnemis and 7.04 ± 0.29 pg/DNA in the intermediate subgroup. Eletrophoresis of total blood serum in Bufo ictericus, Bufo paracnemis and the intermediate specimens revealed a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bufo; Hybridization; Cytogenetics; Nuclear DNA; Seroproteins.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572003000300012

Molecular data highlight hybridization in squirrel monkeys (Saimiri, Cebidae)
Provedor de dados: Genetics and Molecular Biology
Autores: Carneiro,Jeferson; Rodrigues-Filho,Luis Fernando da Silva; Schneider,Horacio; Sampaio,Iracilda.
Abstract Hybridization has been reported increasingly frequently in recent years, fueling the debate on its role in the evolutionary history of species. Some studies have shown that hybridization is very common in captive New World primates, and hybrid offspring have phenotypes and physiological responses distinct from those of the "pure" parents, due to gene introgression. Here we used the TA15 Alu insertion to investigate hybridization in the genus Saimiri. Our results indicate the hybridization of Saimiri boliviensis peruviensis with S. sciureus macrodon, and S. b. boliviensis with S. ustus. Unexpectedly, some hybrids of both S. boliviensis peruviensis and S. b. boliviensis were homozygous for the absence of the insertion, which indicates that the...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Saimiri; Squirrel monkeys; Alu elements; Hybridization.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572016000400539

Combined use of mitochondrial and nuclear genetic markers further reveal immature marine turtle hybrids along the South Western Atlantic
Provedor de dados: Genetics and Molecular Biology
Autores: Brito,Cíntia; Vilaça,Sibelle Torres; Lacerda,Ana Luzia; Maggioni,Rodrigo; Marcovaldi,Maria Ângela; Vélez-Rubio,Gabriela; Proietti,Maíra Carneiro.
Abstract Marine turtle hybridization is usually sporadic and involves reports of only a few individuals; however, Brazilian populations have high hybridization rates. Here we investigated the presence of hybrids in morphologically identified immature hawksbills (Eretmochelys imbricata) along the South Western Atlantic (SWA). We sequenced one mitochondrial (D-Loop) and three nuclear DNA (RAG1, RAG2, and CMOS) markers to better understand the patterns and characteristics of hybrids. We identified 22 hybrids (n = 270), 11 of them at the extreme South of the SWA. Uruguay had the highest hybrid frequency in the SWA (~37.5%) followed by southern Brazil with 30%. These are common areas for loggerheads (Caretta caretta) but uncommon for hawksbills, and these...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Hybridization; Cheloniidae; Genetic markers; Hybrid distribution; Conservation.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572020000400704

Heterosis in okra hybrids obtained by hybridization of two methods: traditional and experimental
Provedor de dados: Horticultura Brasileira
Autores: Maciel,Gabriel M; Luz,José MQ; Campos,Saulo FB; Finzi,Rafael R; Azevedo,Breno NR.
ABSTRACT High heterosis values can be obtained using hybrid okra seeds. However, despite high heterotic values, it is very difficult to produce hybrid okra seeds. The objective of this study was to evaluate an experimental methodology of hybridization. Two different methods of hybridization were used: traditional manual hybridization with complete emasculation followed by hand pollination (artificial) and, an experimental methodology, performing manual hybridization with incomplete emasculation followed by entomophilous natural pollination between two inbred lines (UFU-QB-040D and UFU-QB-107G).These inbred lines were obtained from three selection cycles. Three hybrid types were obtained from the two hybridization methods: F1 THM(UFU-QB-040D x UFU-QB-107G),...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abelmoschus esculentus; Hybridization; Heterosis; Pollination.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362017000100119

Additive and non-additive genetic effects for fruit traits of ornamental pepper
Provedor de dados: Horticultura Brasileira
Autores: Pessoa,Angela Maria dos S; Rêgo,Elizanilda R do; Rêgo,Maílson M do.
ABSTRACT Pepper plants can be used as ornamental ones due to the contrasting traits of plants, flowers, and especially fruits. This variability can be exploited in genetic improvement programs aiming at identifying superior genotypes and obtaining hybrids. This work aimed to select parental and hybrid individuals through diallel analysis for fruit traits in Capsicum annuum. Seven pepper genotypes were crossed, and eleven fruit-related quantitative traits were evaluated. The data were subjected to diallel analysis using Griffing’s Method 1 (fixed model). There was a predominance of additive genetic effects on the fruit traits of ornamental pepper plants. Genotypes UFPB77.3 and UFPB390 are indicated as parents for the improvement of ornamental pepper plants,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Capsicum annuum; Diallel; Hybridization.
Ano: 2021
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362021000100039

Evaluation of production and quality traits in interspecific hybrids of ornamental pepper
Provedor de dados: Horticultura Brasileira
Autores: Nascimento,Naysa Flávia F do; Rêgo,Elizanilda R do; Nascimento,Mayana F; Bruckner,Cláudio H; Finger,Fernando L; Rêgo,Mailson M do.
ABSTRACT The cultivation of potted peppers as ornamental plants has increased considerably throughout the planet. In Brazil, this crop is more recent and still lacks cultivars. In order to increase the available variability and obtain new cultivars, the interspecific hybridization is very useful in add a desirable attribute that occurs in one species to another species, resulting in a new cultivar of agronomic interest. The objective of this study was to characterize parents and interspecific hybrids based on 27 quantitative traits and evaluate their genetic diversity by multivariate procedures. Parents of seven pepper genotypes were crossed, and, seven hybrids were generated. The experiment was conducted in a completely randomized design. Data were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Capsicum spp.; Hybridization; Relative importance; Breeding; Characterization.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362019000300315

Cytogenetic study in natural hybrids of Callithrix (Callitrichidae: Primates) in the Atlantic forest of the state of Rio de Janeiro, Brazil
Provedor de dados: Iheringia Série Zoologia
Autores: Nogueira,Denise M.; Ferreira,Ana Maria R.; Goldschmidt,Beatriz; Pissinatti,Alcides; Carelli,Juliane B.; Verona,Carlos E.
In the Atlantic forest of Rio de Janeiro, Callithrix aurita (É. Geoffroy in Humboldt, 1812) is a native species vulnerable to extinction and C. jacchus (Linnaeus, 1758) and C. penicillata (É. Geoffroy, 1812) are invasive species. The major threats to the native species are habitat degradation and hybridization, although there are currently no genetic data about natural hybrids available. Previous studies have revealed that species of the Callithrix genus are extremely homogeneous in their karyotypes with the exceptions of the morphology and size of the Y chromosome and its nucleolar organizer region (NOR) banding pattern. Three male marmosets captured in the wild in Guapimirim municipality, Rio de Janeiro, Brazil, considered as possible hybrids between C....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Marmosets; Y-chromosome; Karyotype; Hybridization.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212011000200002

Identificação de cultivares de coqueiro no germinadouro através da coloração do coleto.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: ARAGÃO, W. M.; TUPINAMBÁ, E. A.; RIBEIRO, F. E.
Este trabalho objetiva apresentar, para técnicos e produtores, de forma prática, como identificar cultivares de coqueiro no germinadouro, atráves da coloração do coleto da plantula.
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Cocos nucifera L; Colour; Crossbreeding.; Coco; Cruzamento; Cor; Hibridação; Melhoramento Genético Vegetal; Método de Melhoramento; Variedade.; Breeding methods; Hybridization; Plant breeding; Varieties.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/371082

Estudos biológicos da floração e da frutificação da castanha-do-brasil (Bertholletia excelsa H.B.K).
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: MORITZ, A.
Introdução e apresentação do problema. Material e métodos de pesquisa. Generalidade sobre a biologia da castanha-do-brasil. Estudos biológicos e citológicos da floração e da frutificação. Cruzamentos entre diferentes clones. Métodos estatísticos e avaliação em relação a taxa e tipo de fecundação. Desenvolvimento da floração e dos frutos. Fecundação e vingamento. Discussão; Avaliação geral dos resultados. Considerações especiais para o vingamento. Propostas para futuros trabalhos de pesquisa. Considerações finais e resumos.
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Castanha-do-brasil.; Cruzamento Vegetal; Fenologia; Floração; Frutificação.; Brazil nuts; Fruiting; Flowering; Hybridization; Phenology.
Ano: 1984
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/387228

Indícios de hibridação natural entre Hevea brasiliensis (H.B.K.) Muell. Arg. e H. camargoana Pires com base na anatomia da madeira.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: GOMES, J. I.
bitstream/item/40426/1/Boletim-Pesquisa-52-CPATU.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Hevea camargoana; Joanes; Salvaterra; Belém; Ilha de Marajó; Pará; Guajara Mirim; Rondônia; Brasil; Anatomy; Rubber tree.; Anatomia; Hevea Brasiliensis; Hibridação; Madeira; Seringueira.; Amazonia; Hybridization; Wood.
Ano: 1983
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/383851

Estudos de hibridação em pimenta-do-reino (Piper nigrum L.).
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: BARRIGA, R. H. M. P.; ALBUQUERQUE, F. C. de; DUARTE, M. de L. R.
bitstream/item/57763/1/CPATU-PA2.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Pimenta-do-reino; Polinização controlada.; Hibridação; Melhoramento; Piper Nigrum.; Hybridization; Plant breeding; Pollination.
Ano: 1980
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/378127

Avaliação de dois métodos de polinização em pimenta-do-reino.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: POLTRONIERI, M. C.; ALBUQUERQUE, F. C. de; POLTRONIERI, L. S.
bitstream/item/59308/1/CPATU-ComTec74.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Pimenta-do-reino; Avaliação; Black papper; Valuation; Method.; Hibridação; Método; Polinização.; Piper Nigrum; Hybridization; Pollination.
Ano: 1993
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/380542

Avaliação de híbridos interespecíficos de Elaeis guineensis x Elaeis oleifera.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: ANDRADE, E. B. de; BRANDÃO, J. R.
bitstream/item/57579/1/CPATU-PA121.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Caiane; Melhoramento genético.; Dendê; Elaeis Guineensis; Elaeis Oleifera; Hibridação.; Hybridization; Plant breeding.
Ano: 1983
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/383241

Novas cultivares de cafeeiros Coffea canephora para a Amazônia Ocidental Brasileira: Principais características.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: ESPINDULA, M. C.; TEIXEIRA, A. L.; ROCHA, R. B.; RAMALHO, A. R.; VIEIRA JUNIOR, J. R.; ALVES, E. A.; DIOCLECIANO, J. M.; LUNZ, A. M. P.; SOUZA, F. de F.; COSTA, J. N. M.; FERNANDES, C. de F.
Esse trabalho é resultado de 16 anos de pesquisa, iniciado no ano de 2003 a partir da hibridação controlada entre plantas matrizes das variedades Conilon e Robusta do Banco Ativo de Germoplasma da Embrapa. Dentre os avanços obtidos neste estudo, destacam-se: 1) o registro individual das novas cultivares; 2) a natureza híbrida das cultivares, resultado da recombinação entre variedades botânicas distintas e; 3) a riqueza de informações sobre cada cultivar. O objetivo nesta publicação é apresentar as principais características das novas cultivares para cultivo na Amazônia Sul Ocidental Brasileira.
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Café Conilon; Nova cultivar; Embrapa Rondônia; Porto Velho (RO); Rondônia; Amazônia Ocidental; Western Amazon; Coffea Canephora; Café Robusta; Hibridação; Características Agronômicas; Melhoramento Genético Vegetal; Banco de Germoplasma; Hybridization; New variety; Agronomic traits; Plant breeding; Germplasm.
Ano: 2019
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1112645

Intervarietal hibrydization in mango (Mangifera indica L.): techniques, main results and their limitations.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: PINTO. A. C. de Q.; ANDRADE, S. R. M. de; VARGAS RAMOS, V. H.; CORDEIRO, M. C. R.
bitstream/CPAC-2009/24129/1/p2002_06.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Melhoramento genetico; Mango; Tropical fruits.; Fruta Tropical; Hibridação; Mangifera Indica; Manga; Método de Melhoramento.; Breeding methods; Hybridization; Plant breeding.
Ano: 2004
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/567435

Marcadores morfológicos em coqueiros (Cocos nucifera L.): coloracão do coleto.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: ARAGAO, W. M.; CAMARA, T. M.; RIBEIRO, F. E.
Os marcadores de coloracao do coleto da plantula do coqueiro sao utilizados na certificacao de cruzamentos, baseado na heranca genetica das cores amarela, verde e marrom do coqueiro. Sua adequacao na certificacao e questionada.
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Marcadores genéticos; Mapas genéticos; Hereditariedade genética; Genetic maps; Cocos nucifera L; Colour; Fenotypes; Genetic inheritance; Crossbreeding.; Coco; Cor; Cruzamento; Fenótipo; Hibridação; Melhoramento Genético Vegetal.; Genetic markers; Hybridization; Plant breeding.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/370884

Response to selection for growth in an interspecific hybrid between Oreochromis mossambicus and O. niloticus in two distinct environments
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: De Verdal, Hugues; Rosario, Westly; Vandeputte, Marc; Muyalde, Nerafe; Morissens, Pierre; Baroiller, Jean-francois; Chevassus, Bernard.
The development of a saline tolerant tilapia strain able to grow fast is of importance in the Philippines, where 240 000 ha of brackish water ponds are available. To this end, founder hybridization between Oreochromis niloticus (with favorable growth traits) and O. mossambicus (with favorable salinity tolerance traits) was performed and followed by backcrossing with O. mossambicus to develop a strain highly tolerant to saline environments. Genetic selection for growth performance was subsequently conducted. The aim of the present study was to estimate growth performance and survival of the hybrid in two rearing environments following four generations of genetic selection.  A comparison between the hybrid and an internal reference line was performed in two...
Tipo: Text
Palavras-chave: Salinity tolerance; Selection; Hybridization; Genetic gain; Heritability; Survival rate.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00187/29836/28287.pdf

Is fertility of hybrids enough to conclude that the two oysters Crassostrea gigas and Crassostrea angulata are the same species?
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Huvet, Arnaud; Gerard, Andre; Ledu, Christophe; Phelipot, Pascal; Heurtebise, Serge; Boudry, Pierre.
The distinction of the two cupped oysters Crassostrea gigas (Thunberg, 1793) and Crassostrea angulata (Lamark, 1819) into two species was chiefly due to their differing geographical distributions, C. gigas being present in Asia and C. angulata in Europe. Today it is commonly accepted that C. angulata and C. gigas are a single species according to morphological, genetic and F1 hybridization data. However, the demonstration of the fertility of their hybrids and the absence of any reproductive isolation remained to be investigated. Consequently, we studied the fertility of hybrids and sperm competition by performing three different experiments and producing G1 and G2 hybrid progenies between wild populations of C. angulata and C. gigas. Progenies showed very...
Tipo: Text
Palavras-chave: Crassostrea angulata; Crassostrea gigas; Developmental yields of larvae; Fertility; Controlled crosses; Hybridization.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/2002/publication-1395.pdf

Is the Portuguese oyster Crassostrea angulata in Southern Europe endangered by the expansion of the Pacific oyster C. gigas?
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Batista, Frederico; Boudry, Pierre; Lapegue, Sylvie; Heurtebise, Serge; Monteiro, C. C.
The Portuguese oyster, Crassostrea angulata, was introduced from Portugal to the French Atlantic Coast in the 1860s. C. angulata quickly settled and expanded and leaded to the development of a new aquacultural industry in France. In the late 1960s, mortality associated with the detection of an iridovirus, led to the wipe out of C. angulata from French Atlantic waters and to the massive introduction of C. gigas to sustain production. In Southern Europe, similar symptoms were also observed in natural stocks of C. angulata from Sado River (Portugal) and from the area of Cadiz (Spain). Nowadays, only very few «pure» populations of C. angulata remain in southern Europe. These populations are potentially endangered by the current expansion of C. gigas...
Tipo: Text
Palavras-chave: Selection; Hybridization; Settlement pattern; Population genetic; Genetic; Oysters; Crassostrea angulata; Crassostrea gigas.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/acte-3310.pdf

Comparative study of shell shape and muscle scar pigmentation in the closely related cupped oysters Crassostrea angulata, C. gigas and their reciprocal hybrids
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Batista, Frederico; Ben-hamadou, Radhouan; Fonseca, Vera; Taris, Nicolas; Ruano, Francisco; Reis-henriques, Maria; Boudry, Pierre.
The taxonomic status of the cupped oysters Crassostrea angulata and C. gigas has received considerable attention in the last decades. Based on larval shell morphology, experimental hybridization, allozymes and nuclear DNA studies several authors have considered these two taxa as being synonymous. However, mitochondrial data showed clear genetic differences between the two taxa. In addition, microsatellite-based studies and cytogenetic studies have also provided evidence that supports their differentiation. Considerable differences have also been observed at the phenotypic level in terms of growth rate and ecophysiological parameters. In the present study, C. angulata from Sado estuary (Portugal) and C. gigas from Seudre estuary (France) were collected and...
Tipo: Text
Palavras-chave: Crassostrea gigas; Crassostrea angulata; Hybridization; Shell pigmentation; Shell morphology.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-3904.pdf

Microsatellite analysis of 6-hour-old embryos reveals no preferential intraspecific fertilization between cupped oysters Crassostrea gigas and Crassostrea angulata
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Huvet, Arnaud; Balabaud, K; Bierne, Nicolas; Boudry, Pierre.
Experimental examination of reproductive isolation is the first step in understanding li,hybridization processes. Here, we studied preferential fertilization between 2 cupped oyster taxa, Crassostrea angulata and Crassostrea gigas, as a potential prezygotic reproductive isolation. Early examination of sperm competition is now possible by molecular analysis of oyster embryos. This avoids the confounding effect of differential mortality during the larval stage. Six hundred embryos were sampled from 2 crosses. Three microsatellite loci were enough to determine without ambiguity the taxa of contributing sires of embryos. No evidence of preferential fertilization between gametes from the same taxa was shown. A significantly higher contribution of the C. gigas...
Tipo: Text
Palavras-chave: Paternal contribution; Microsatellites; In vitro crossings; Hybridization; Crassostrea angulata; Crassostrea gigas.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/2001/publication-436.pdf

Hybridization and morphological differences between the two closely related oyster taxa Crassostrea angulata and C. gigas
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Batista, Frederico; Fonseca, Vera; Ben-hamadou, Radhouan; Taris, Nicolas; Henriques, Maria; Boudry, Pierre.
Unlike in some crops, no large heterotic effects have been observed in most farmed animals. Interestingly, significant hybrid vigour for some traits has been reported in the Pacific oyster, Crassostrea gigas. Crossbreeding between closely related taxa can be seen as an efficient way to exploit the dominance component of the genetic variance of a trait. Factorial crosses between the Portuguese oyster C. angulata (from Sado estuary, Portugal) and C. gigas (from Seudre estuary, France) were done to evaluate the aquaculture potential of hybrids. Juveniles of the different progenies were reared in Ria Formosa (Portugal) under usual farming conditions. The genetic confirmation of all progenies was done using mitochondrial and nuclear markers in order to detect...
Tipo: Text
Palavras-chave: Hybridization; Crassostrea angulata; Crassostrea gigas; Genetic; Oyster.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/acte-3429.pdf

A hybrid zone between Bathymodiolus mussel lineages from eastern Pacific hydrothermal vents
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Johnson, Shannon B.; Won, Yong-jin; Harvey, Julio B. J.; Vrijenhoek, Robert C.
Background: The inhabitants of deep-sea hydrothermal vents occupy ephemeral island-like habitats distributed sporadically along tectonic spreading-centers, back-arc basins, and volcanically active seamounts. The majority of vent taxa undergo a pelagic larval phase, and thus varying degrees of geographical subdivision, ranging from no impedance of dispersal to complete isolation, often exist among taxa that span common geomorphological boundaries. Two lineages of Bathymodiolus mussels segregate on either side of the Easter Microplate, a boundary that separates the East Pacific Rise from spreading centers connected to the Pacific-Antarctic Ridge.  Results: A recent sample from the northwest flank of the Easter Microplate contained an admixture of northern...
Tipo: Text
Palavras-chave: Bathymodiolus antarcticus n. sp; Hybridization; Recombination; Linkage disequilibrium; Deep-sea; Hydrothermal vent; Bathymodiolus thermophilus.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00185/29626/28000.pdf

Infestation of the cupped oysters Crassostrea angulata, C. gigas and their first-generation hybrids by the copepod Myicola ostreae: differences in susceptibility and host response
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Batista, F. M.; Boudry, Pierre; Dos Santos, A.; Renault, Tristan; Ruano, F.
We Studied the prevalence and intensity of the parasitic copepod Myicola ostreae in 2 closely related oysters Crassostrea angulata and C. gigas and their F1 hybrids. The effects on host and host reaction were also analysed to better understand host-parasite relationships between copepods and bivalve molluscs. Full reciprocal crosses were carried out between C. angulata and C. gigas and the progenies were reared in the wild in Ria Formosa Lagoon (Portugal), allowing natural infestation by M. ostreae. Prevalence and intensity were significantly higher in C. angulata than in C. gigas. The parasite level of F1 hybrids was similar to C. angulata and significantly higher than in C. gigas. The results of our study support a hypothesis of dominantly inherited...
Tipo: Text
Palavras-chave: Encapsulation; Host reaction; Host parasite relationship; Dominance inherence; Parasitism; Hybridization; Copepods; Oysters.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6442.pdf

Diversite de populations microbiennes thermophiles d'une cheminée hydrothermale océanique profonde : cultures d'enrichissement en bioréacteur et isolement d'espèces nouvelles
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Postec, Anne.
To explore the microbial diversity at deep sea vents, molecular techniques based on the analysis of the gene coding the 16S ribosomal RNA permitted to highlight a large archaeal and bacterial diversity. Nevertheless, the diversity of the hydrothermal microorganisms cultivated to date remains much lower than the diversity described with molecular tools. Innovative methods should therefore be used in order to cultivate new microorganisms, and also determine their metabolic properties and their potential role in the ecosystem. That was the purpose of this study: a bioreactor gas-lift was used to perform enrichment cultures in continuous, during 50 days, in thermophilic (60°C) and hyperthermophilic (90°C) conditions. A hydrothermal chimney sample (Rainbow...
Tipo: Text
Palavras-chave: Strain isolation and characterization; Hybridization; Sequencing; Cloning; DGGE; Gas lift bioreactor; Enrichment cultures; Deep sea hydrothermal vents; Bacteria; Archaea; Diversity; Isolement et caractérisation de souche; Hybridation; Séquençage; Clonage; DGGE; Bioréacteur gas lift; Cultures d'enrichissement; Sources hydrothermales océaniques profondes; Bacteria; Archaea; Diversité.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/these-367.pdf

Genetic improvement and selection in shellfish : a review based on oyster research and production
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Boudry, Pierre; Barre, Marc; Gerard, Andre.
Despite the economic importance of shellfish, genetic improvement has not yet had a great impact on these species. Shellfish farming is traditionally based on wild species whose natural populations are often overexploited and do not fulfill market demand. Up to now, the most effective answer to disease problems or for the improvement of productivity has been the introduction of new species. However, the introduction of new species is constrained by their ecological impact and is also limited by the availability of suitable species. Genetic improvement of local species should therefore be of great importance as a viable alternative for the long term sustainability of the shellfish industry. The different approaches to genetic improvement include...
Tipo: Text
Palavras-chave: Selective breeding; Hybridization; Polyplidy; Introduction; Oysters; Selection; Hybridation; Polyploidie; Introduction; Huitres.
Ano: 1997
URL: http://archimer.ifremer.fr/doc/1997/acte-3499.pdf

Reproductive behaviour of two tilapia species ( Oreochromis niloticus , Linné, 1758; Sarotherodon melanotheron, Rüppel, 1852) in freshwater intra and interspecific pairing context
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Akian, Dieudonne; Yao, Kouakou; Clota, Frederic; Lozano, Paul; Baroiller, Jean Francois; Chatain, Beatrice; Begout, Marie-laure.
Nile tilapia Oreochromis niloticus (NT) and Black-chinned tilapia Sarotherodon melanotheron (BCT) are respectively characterized by fast growth and water salinity tolerance which attract the farmers who could take advantage of both species characteristics by producing hybrids reared in brackish or marine waters. Little information is however available about social interactions between the two species which are distinct by their mode of parental care (oral incubation). The objective of this study was to determine the behaviour of the two species, NT and BCT placed in freshwater intraspecific and interspecific pairing contexts. Females of both species (n = 20 per species) were first isolated for 90 days in a 60 L aquarium to determine the average duration...
Tipo: Text
Palavras-chave: Aggression; Hybridization; Reproduction; Oreochromis niloticus; Sarotherodon melanotheron; Freshwater.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00376/48673/49008.pdf

45-and 70-base DNA supramolecular polymerizations on quartz crystal microbalance biosensor
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lazerges, Mathieu; Perrot, Hubert; Rabehagasoa, Niriniony; Antoine, Elisabeth; Compere, Chantal.
Supramolecular polymerizations of 45- and 70- base DNAs on the surface of an in-situ time-resolved 27 MHz quartz crystal microbalance biosensor.
Tipo: Text
Palavras-chave: Sensor; Design; Kinetics; Immobilization; Hybridization.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/publication-1710.pdf

Genetic improvement and selection in shellfish : a review based on oyster research and production
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Boudry, Pierre; Barre, Marc; Gerard, Andre.
Despite the economic importance of shellfish, genetic improvement has not yet had a great impact on these species. Shellfish farming is traditionally based on wild species whose natural populations are often overexploited and do not fulfil market demand. Up to now, the most effective answer 10 disease problems or for the improvement of productivity has been the introduction of new species. However, the introduction of new species is constrained by their ecological impact and is also limited by the availability 01 suitable species. Genetic improvement of local species should therefore be of great importance as a viable alternative for the long term sustainability 01 the shellfish Industry. The different approaches 10 genetic improvement include...
Tipo: Text
Palavras-chave: Selective breeding; Hybridization; Polyploidy; Introduction; Oyter; Sélection; Hybridation; Polyploïdie; Introduction; Huîtres.
Ano: 1998
URL: http://archimer.ifremer.fr/doc/1998/publication-2740.pdf

Natural hybridization between genetically differentiated populations of Crassostrea gigas and C-angulata highlighted by sequence variation in flanking regions of a microsatellite locus
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Huvet, Arnaud; Fabioux, Caroline; Mccombie, Helen; Lapegue, Sylvie; Boudry, Pierre.
The marine environment is of special interest for studying hybridization between closely related taxa because of the high dispersal potential of planktonic larvae, such as those of most bivalve species. The oysters Crassostrea angulata and C. gigas are known to be very close genetically and entirely inter-fertile under controlled conditions. However, hybridization in the wild had not been investigated, mainly due to the lack of nuclear diagnostic markers. In the present paper, we first estimated genetic differentiation between these 2 closely related taxa using 8 microsatellite markers. Interestingly, 5 markers displayed significant differences of allele size between taxa. The subsequent sequencing of alleles of one of these microsatellites showed several...
Tipo: Text
Palavras-chave: Allele size; Microsatellites; Genetic differentiation; Hybridization; Crassostrea gigas; Crassostrea angulata.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2004/publication-3355.pdf

First insights into the evolutionary history of the Davallia repens complex
Provedor de dados: Naturalis Digital Academic Repository
Autores: Chen, C.-W.; Ngan, L.T.; Hidayat, A.; Evangelista, L.; Nooteboom, H.P.; Chiou, W.-L.
Davallia repens and its close relatives have been identified as a species complex in this study because of the existence of continuously morphological variation. To decipher its evolutionary history, integrated methodologies were applied in this study including morphology, cytology, reproductive biology and molecular phylogeny. Analysis of morphological characters reveals several important discriminating characteristics, such as the shape of stipe scales, frond and indusium. Both diploid and polyploid forms are present in the complex and reproduce sexually and by apogamy, respectively. The incongruence between cpDNA and nDNA phylogeny indicates a hybrid origin for most polyploid individuals. Based on the present results, we hypothesize that there were at...
Tipo: Article / Letter to the editor
Palavras-chave: Apogamy; Davallia repens; Hybridization; Polyploidization.
Ano: 2014
URL: http://www.repository.naturalis.nl/record/525117

Morphological and molecular data to describe a hybrid population of the Common toad (Bufo bufo) and the Spined toad (Bufo spinosus) in western France
Provedor de dados: Naturalis Digital Academic Repository
Autores: Trujillo, T.; Gutiérrez-Rodríguez, J.; Arntzen, J.W.; Martínez-Solano, I.
The use of hyper-variable markers across species is often hindered by low cross-species amplification success, a reduced level of polymorphism or a high frequency of null alleles. However, optimizing sets of reliable and informative markers that can be consistently amplified and scored across taxa is key to address questions about patterns of genetic diversity and structure, hybridization and speciation. Here we present 14 newly developed microsatellite markers in the Spined toad (Bufo spinosus), assess their polymorphism in two Iberian populations and test for cross-species amplification in the closely related Common toad (Bufo bufo). We then use the 12 loci co-amplifying in both species to the study of a morphologically intermediate population (Moyaux)...
Tipo: Article / Letter to the editor
Palavras-chave: Amphibians; Cross-amplification; Genetic polymorphism; Hybridization; Microsatellites; Morphology.
Ano: 2017
URL: http://www.repository.naturalis.nl/record/623750

Additional results and discussion to the paper: Asymmetric viability of reciprocal-cross hybrids between crested and marbled newts (Triturus cristatus and T. marmoratus)
Provedor de dados: Naturalis Digital Academic Repository
Autores: Arntzen, J.W.; Jehle, R.; Bardakci, F.; Burke, T.; Wallis, G.P.
Hybridization between divergent lineages often results in reduced hybrid viability. Here we report findings from a series of independent molecular analyses over several seasons on four life stages of F1 hybrids between the newts Triturus cristatus and T. marmoratus. These two species form a bimodal hybrid zone of broad overlap in France, with F1 hybrids making up about 4% of the adult population. We demonstrate strong asymmetry in the direction of the cross, with one class (cristatus-mothered) making up about 90% of F1 hybrids. By analyzing embryos and hatchlings, we show that this asymmetry is not due to prezygotic effects, as both classes of hybrid embryos are present at similar frequencies, implicating differential selection on the two hybrid classes...
Tipo: Article / Letter to the editor
Palavras-chave: Allozyme; Bateson–Dobzhansky–Muller incompatibility; Cytonuclear incompatibility; Hybridization; Microsatellite; MtDNA; Postzygotic isolation asymmetry; Triturus; 42.82.
Ano: 2008
URL: http://www.repository.naturalis.nl/record/289893

Serpocaulon × manizalense: a new hybrid between simple- and pinnate-leaved species of Serpocaulon (Polypodiaceae) from Colombia
Provedor de dados: Naturalis Digital Academic Repository
Autores: Sanín, D.; Torrez, V.
During a revision of Serpocaulon from Colombia, a new hybrid was found between S. adnatum and S. levigatum near to Manizales city, which is described and illustrated herein. Qualitative and quantitative spore and macro-morphological characters were evaluated using principal component analyses to distinguish the new taxon. Our results suggest that the perispore with leasura, lamina width, rhizome diameter, blade dissection and number of pinnae are important characters to distinguish S. × manizalense. This is the ﬁrst record of a hybrid between a simple and pinnate-leaved species in Serpocaulon, which is considered to be Critically Endangered (CR).
Tipo: Article / Letter to the editor
Palavras-chave: Endangered fern; Hybridization; Multivariate analyses; Serpocaulon adnatum; Serpocaulon levigatum.
Ano: 2014
URL: http://www.repository.naturalis.nl/record/524777

Molecular identification of intergenus crosses involving catfish hybrids: risks for aquaculture production
Provedor de dados: Neotropical Ichthyology
Autores: Hashimoto,Diogo T.; Prado,Fernanda D.; Foresti,Fausto; Porto-Foresti,Fábio.
ABSTRACT Monitoring of the interspecific hybrid production and trade is essential for the appropriate management of these animals in fish farms. The identification of catfish hybrids by morphological analysis is unreliable, particularly of juveniles and post-F1 individuals. Therefore, in the present study, we used five molecular markers (four nuclear genes and one mitochondrial gene) to detect hybrids in the trade of pimelodid juvenile fish from different stocks purchased of five seed producers in Brazil. Samples commercialized as pintado (pure species Pseudoplatystoma corruscans ) from three fish farms were genetically identified as hybrid cachapinta (♀ P. reticulatum x ♂ P. corruscans ). In the stocks purchased as cachandiá (hybrid between ♀ P....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fish farm; Hybridization; Molecular markers; Nuclear genes; Pimelodidae.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252016000200213

Genetic identification of interspecific hybrid of Neotropical catfish species (Pseudoplatystoma corruscans vs. Pseudoplatystoma reticulatum) in rivers of Mato Grosso do Sul State, Brazil
Provedor de dados: Neotropical Ichthyology
Autores: Vaini,Jussara Oliveira; Grisolia,Alexéia Barufatti; Prado,Fernanda Dotti do; Porto-Foresti,Fábio.
Hybrids of the species Pseudoplatystoma corruscansvs.Pseudoplatystoma reticulatum are extensively traded because they are more docile and precocious compared to their parents. This study aimed to identify the occurrence of hybrid 'Surubim' in rivers of the State of Mato Grosso do Sul, applying molecular techniques. Pseudoplatystoma corruscans, Pseudoplatystoma reticulatum and hybrid 'Surubim' were detected using multiplex PCR and PCR-RFLP in RAG2, GLOBIN, EF1α, 18S rRNA nuclear genes, and mitochondrial 16S rRNA gene. The results revealed the presence of F1 hybrids in rivers and the occurrence of genetic introgression, evidenced by the Post-F1 hybrids. Furthermore, discrepancies between the morphological and genetic identification were observed,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Conservation; Fish; Hybridization; Introgression; Molecular markers.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252014000300635

Exploitation of wild relatives of pigeonpea and chickpea for resistance to Helicoverpa armigera
Provedor de dados: Open Acess Agriculture Research Repository
Autores: Mallikarjuna, N.,( Nalini Mallikarjuna ).
Palavras-chave: Pigeonpeas; Chickpeas; Hybridization; Genes; Gene pools; Interspecific hybridization; Hybrids; Genomes; Gene transfer; Polyploidy.
Ano: 2007
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3283

Progress in interspecific hybridization between Cicer arietinum and wild species C. bijugum
Provedor de dados: Open Acess Agriculture Research Repository
Autores: Mallikarjuna, N.,( Nalini Mallikarjuna ).
Palavras-chave: Chickpeas; Hybrids; Cytokinins; Self pollination; Cross pollination; Crossing over; Hybridization; Interspecific hybridization; Heterocyclic compounds; DNA.
Ano: 2007
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3343

Open flower segregants selected from cajanus platycarpus crosses
Provedor de dados: Open Acess Agriculture Research Repository
Autores: Cherian, C.A.
Palavras-chave: Pigeonpeas; Self pollination; Cytoplasm; Cross pollination; Segregation; Crossing over; Biotechnology; Hybridization; Hybrids; Grain.
Ano: 2006
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3187

Recent advances in research and management of Botrytis gray mold of chickpea
Provedor de dados: Open Acess Agriculture Research Repository
Autores: S.
Palavras-chave: Chickpeas; Fungicides; Fungi; Lentils; Heterocyclic compounds; Biological control; Grain legumes; Intercropping; Hybridization; Microclimate.
Ano: 1998
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/4208

Artificial Hybridization in Groundnut
Provedor de dados: Open Acess Agriculture Research Repository
Autores: S.N.
Palavras-chave: Hybridization; Self pollination; Artificial hybridization; Groundnuts; Hybrids; Cross pollination; Planting; Crop management; Genes; Crossing over.
Ano: 1990
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/4085

International study on &lt;i&gt;Artemia&lt;/i&gt; : LX. Allozyme data suggest that a new &lt;i&gt;Artemia&lt;/i&gt; population in southern Chile (50° 29' S; 73° 45' W) is &lt;i&gt;A. persimilis&lt;/i&gt;
Provedor de dados: Open Marine Archive
Autores: Gajardo, G.; Mercado, C.; Beardmore, J.A.; Sorgeloos, P.
An &lt;i&gt;Artemia&lt;/i&gt; population from a site recently described in Chile and located in a semi-arid and humid hydrographical zone (Torres del Paine National Park), was electrophoretically characterized and cross-bred (followed through &lt;i&gt;F&lt;/i&gt;&lt;sub&gt;3&lt;/sub&gt;) to reference samples of &lt;i&gt;A. franciscana&lt;/i&gt; (San Francisco Bay, California, USA) and &lt;i&gt;A. persimilis&lt;/i&gt; (Buenos Aires, Argentina), which are the species most likely to be found in Chile. The population exhibited high levels of genetic variability as judged by the percentage of polymorphic loci (&lt;i&gt;P&lt;/i&gt;=53.3), mean number of alleles per locus (&lt;i&gt;n&lt;/i&gt;=2.2) and mean heterozygosity (&lt;i&gt;H&lt;/i&gt;=0.176). Based on...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allopatric populations; Allozymes; Genetic isolation; Hybridization; Population genetics; Chile.
Ano: 1999
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=4016

Re-examining the hypothesis of allopatric distribution of Myoprocta acouchy and M. pratti (Mammalia: Dasyproctidae) in South America
Provedor de dados: Papéis Avulsos de Zoologia
Autores: Ramírez-Chaves,Héctor E.; Suárez-Castro,Andrés F.; Patterson,Bruce D.
Currently, two allopatric species of acouchies, genus Myoprocta (Rodentia: Dasyproctidae) are recognized. Nevertheless, there is morphological variability in the regions where the species are distributed that suggests either sympatry of two (or more) distinct species or else breakdowns in the characters that have been used to diagnose the species. We reviewed specimens of Myoprocta from Colombia and found that both reddish and greenish forms are sympatric in the Amazon basin of the country, including areas adjoining Ecuador and Peru. These records apparently refute the hypothesis of allopatry for these species in South America. However, the results of a principal components analysis showed little or no morphological separation between these two forms. In...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazonas; Acouchies; Distribution; Hybridization; Sympatry.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492014003100001

INHERITANCE OF RESISTANCE TO PROTOPORPHYRINOGEN OXIDASE INHIBITOR HERBICIDES IN WILD POINSETTIA
Provedor de dados: Planta Daninha
Autores: BRUSAMARELLO,A.P.; OLIVEIRA,P.H.; TREZZI,M.M.; XAVIER,E.; DALOSTO,E.D.
ABSTRACT Weed resistance to herbicides is a major global problem for agriculture. In recent years, the increased use of herbicides, without proper planning, has led to a large increase in the number of cases of weed biotypes that are resistant to one or more herbicide mechanism of action. Wild poinsettia biotypes (Euphorbia heterophylla), discovered in the State of Paraná, with resistance to herbicides that inhibit protoporphyrinogen oxidase (PROTOX) and acetolactate synthase (ALS), are the first case to exhibit multiple resistance in Brazil. This study analyzed the genetic inheritance of PROTOX inhibiting herbicide resistance in E. heterophylla. Crosses were conducted between biotypes that were susceptible (female parent) and those carrying multiple...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Euphorbia heterophylla; Hybridization; Genetics; Herbicide.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582016000300575

A KOMPOLTI ŐSZI ÁRPA NEMESÍTÉS HELYE EURÓPÁBAN
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Muranyi,   Istvan; Simon,   Anna.
A növénynemesítés fokozatosan romló működési körülményei, a hatékony marketing és a vetőmagkereskedelem hiányosságai, a külföldi fajták nyomása következtében több növényfajban a hazai nemesítés jelentősége csökkent az utóbbi 20 évben, sőt néhány növényfaj nemesítése Magyarországon meg is szűnt. A Kompolton folyó őszi árpa nemesítés eredményesen állt helyt a külföldi fajtaelőállítók nyomásának. Fajtáink kiváló termőképessége mellett, kiemelkedő télállósággal, igen jó szárszilárdsággal, megbízható állóképességgel, összességé-ben kiváló alkalmazkodóképességgel rendelkeznek. Összesen 12 takarmányárpa és 2 őszi sörárpa fajtánkkal minden termesztési választékkal rendelkezünk. 2004-ben az OMMI kísérletekben a korai és a középérésű csoportban is két-két fajtánk...
Tipo: Journal Article
Palavras-chave: Növénynemesítés; Új kihívások és irányok; Hybridization; New challenges and directions; Crop Production/Industries; Production Economics.
Ano: 2005
URL: http://purl.umn.edu/54859

Reproductive phenology of Melocactus (Cactaceae) species from Chapada Diamantina, Bahia, Brazil
Provedor de dados: Revista Brasileira de Botânica
Autores: Fonseca,Rosineide Braz Santos; Funch,Ligia Silveira; Borba,Eduardo Leite.
This paper discusses the phenological strategies of Melocactus glaucescens Buining &amp;amp; Brederoo, M. paucispinus G. Heimen &amp;amp; R. Paul, M. ernestii Vaupel and M. ×albicephalus Buining &amp;amp; Brederoo, species from Chapada Diamantina, northeastern Brazil. Melocactus glaucescens, M. ernestii and M. ×albicephalus occur sympatrically in an area of "caatinga"/"cerrado" vegetation, and M. paucispinus in an area of "cerrado"/"campo rupestre". The superposition of flowering in these sympatric taxa was compared and analyzed. The phenology of M. paucispinus was correlated with both abiotic and biotic factors. Flowering of M. glaucescens and M. ×albicephalus were observed to be continuous (though with moderate peaks of activity), while fruiting was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cactaceae; Hybridization; Melocactus; Phenology; Reproductive biology.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042008000200006

Evidence of natural hybridization and introgression in Bulbophyllum involutum Borba, Semir &amp;amp; F. Barros and B. weddellii (Lindl.) Rchb. f. (Orchidaceae) in the Chapada Diamantina, Brazil, by using allozyme markers
Provedor de dados: Revista Brasileira de Botânica
Autores: Azevedo,Cecília O.; Borba,Eduardo L.; Van Den Berg,Cássio.
Hybridization between B. involutum and B. weddellii (Orchidaceae) has been first observed in the Serra do Cipó, Minas Gerais State, Brazil, the hybrid being described as B. ×cipoense Borba &amp;amp; Semir. In this study, allozime electrophoresis was used to test the hypothesis of occurrence of hybridization between these two species, as suggested by morphological characters, in the Chapada Diamantina, Bahia State, Brazil. The lack of a diagnostic locus does not allow definite confirmation of the natural hybridization, although this hypotheses is reinforced by the absence of exclusive alleles in the putative hybrid individuals. The existence of several different genotypes points out to either population derived from multiple hybridization events or the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bulbophyllum; Genetic variability; Hybridization; Introgression; Orchidaceae.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042006000300008

Pre-isolation, isolation and regeneration protoplasts from leaf mesophyll of in vivo Malus domestica ‘Anna’ cv.
Provedor de dados: Revista Brasileira de Fruticultura
Autores: El-Gioushy,Sherif Fathy Eid El-Sayed; Kareem,Abdul; Baiea,Mohamed Hemdan Mohamed.
Abstract  To isolate protoplast, a pre-treatment was completed with the order to reduce and identify the phenolic contents round the year to encourage the isolation of protoplasts. Protoplasts from in vivo mesophyll leaves of apple cultivar “Anna” was isolated from 15 days old leaves by plasmolying in medium containing 90 g L-1 mannitol for half hour, then 130 g L-1 mannitol for half hour. Then using enzymatic mixture involving (1.5% cellulase + 0.5% pectianase + 1.5% Macrozyme) Prior to isolation. Anyhow, diverse factors, for example, Osmotic pressure, incubation period, sieve pore size, centrifugation period and hormonal balance was estimated using the techniques for isolation. The quantity of cells was computed as the quantity of cells per square on...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Apple; Hybridization; Cellulase; Pectianase; Macrozyme.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452019000400803

A hybrid zone of two toad sister species, Rhinella atacamensis and R. arunco (Anura: Bufonidae), defined by a consistent altitudinal segregation in watersheds
Provedor de dados: Revista Chilena de Historia Natural
Autores: CORREA,CLAUDIO; MÉNDEZ,MARCO A; ARAYA,SERGIO; LOBOS,GABRIEL; PALMA,R. EDUARDO.
Delimiting the spatial extension of a hybrid zone is essential to understand its historical origin and to identify the geographical and/or environmental factors which delimit it. Rhinella atacamensis and R. arunco are two sister species which together inhabit Chile between 25° and 38° S. Their distribution limits coincide at about 32° S, where recently it was reported that they hybridize in a small watershed (Pupío creek). Although the genetic evidence suggests that these two species form a hybrid swarm, they are not mixed homogeneously in the entire watershed, but rather are spatially segregated: R. arunco is found in the lower part of the creek and R. atacamensis in the higher part. An extensive exploration north and south of 32° S revealed other...
Tipo: Journal article
Palavras-chave: AFLP markers; Chile; Control region; Hybridization; Toads.
Ano: 2013
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2013000200001

Selection and use recommendation in hybrids of ornamental pineapple
Provedor de dados: Revista Ciência Agronômica (RCA)
Autores: Souza,Everton Hilo de; Costa,Maria Angélica Pereira de Carvalho; Santos-Serejo,Janay Almeida; Souza,Fernanda Vidigal Duarte.
The use of pineapples as ornamental plants has increased in the last years due to their beauty and originality, demanding the generation of new varieties. The objective of the present work was to study the genetic variability and type of use of hybrids as ornamental pineapples, besides evaluating the resistance of these hybrids to Fusarium wilt. Six progenies, FRF-22 X FRF-1387, FRF-1392 X FRF-32, Curauá Roxo X Ananás Tricolor, G-44 X FRF-1387, FRF-1392 X FRF-224 and FRF-1387 X FRF-224, were evaluated by eleven morphological descriptors, and five categories of use were taken into account: landscaping plants, cut flower, potted plants, minifruits and foliage. High variability within and between progenies was detected, which allowed the selection of 16...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ananas sp.; Hybridization; Morphological descriptors; Ornamental fruit crops; Phytosanitary.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902014000200024

Storage of pollen and properties of olive stigma for breeding purposes
Provedor de dados: Revista Ciência Agronômica (RCA)
Autores: Zambon,Carolina Ruiz; Silva,Luiz Fernando de Oliveira da; Pio,Rafael; Bianchini,Flávio Gabriel; Oliveira,Adelson Francisco de.
ABSTRACT In order to ensure success in controlled hybridizations in olive tree cultivation, the information on pollen viability and stigma receptivity is essential. The aim was to establish methodologies that increase the preservation of pollen viability and to establish the time to perform crossbreeds in hybridization studies with olive trees. Three experiments were performed with plants from the cultivar Arbequina, in Maria da Fé, MG, Brazil. In the first experiment, the description of the flower events was performed. In the second, anthers were desiccated in eppendorfs, being stored at three different conditions for pollen viability test: room temperature (27 ºC), refrigerator (8 ºC) and freezer (-10 ºC). In order to evaluate the in vitro germination,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Olea europaea L.; Pollen viability; Pollen grains; Hybridization.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902018000200291

Intraspecific tetraploid hybrids of Paspalum notatum: agronomic evaluation of segregating progeny
Provedor de dados: Scientia Agricola
Autores: Weiler,Roberto Luis; Dall'Agnol,Miguel; Simioni,Carine; Krycki,Karine Cristina; Pereira,Emerson André; Machado,Juliana Medianeira; Motta,Éder Alexandre Minski da.
ABSTRACT: For many decades, animal production in southern Brazil has been based on native forage grasses. Paspalum notatum Flügge (bahiagrass) is one of the most frequently used native grass in southern Brazil. The native germplasm of P. notatum is tetraploid and displays apomictic reproduction; hence, chromosome doubling of sexual diploid accessions is required to facilitate hybridization. The main goal of this study was to evaluate forage production and other agronomical evaluation of P. notatum intraspecific hybrids in order to obtain new varieties that could be registered and/or protected and launched as new cultivars in the future. Three tetraploid sexual genotypes were crossed with the ecotypes Bagual and André da Rocha. Biomass production (leaf,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bahiagrass; Hybridization; Forage yield.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162018000100036

Vigor and mortality of citrus progenies with potential use as rootstocks
Provedor de dados: Scientia Agricola
Autores: Santana,Lizziane Gomes Leal; Souza,Edson dos Santos; Passos,Orlando Sampaio; Gesteira,Abelmon da Silva; Ledo,Carlos Alberto da Silva; Soares Filho,Walter dos Santos.
ABSTRACT: Rootstocks influence certain characteristics of the scion, such as vigor, fruit yield and quality, and tolerance to biotic and abiotic factors. In conventional citrus breeding programs, hybridization is the main method used for obtaining rootstock varieties. Between Sept and Oct 2006, controlled pollinations were carried out resulting in nine progenies, totaling 461 hybrid seedlings. The female parents were the ‘Santa Cruz Rangpur’ lime (SCRL) and the ‘Sunki of Florida’ mandarin (SFM), while the male parents, in addition to this mandarin, were the ‘Indio’ and ‘Riverside’ citrandarins, the ‘Thomasville’ citrangequat (THOM), the ‘Swingle’ citrumelo, the ‘Argentina’ citrange (AGC) and the ‘Benecke’ trifoliate orange (BKTO). Fruit setting rates of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Citrus spp.; Poncirus trifoliata; Hybridization; Plant breeding.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162018000400339

Sorghum breeding
Provedor de dados: Thai Agricultural Research Repository
Autores: Krisda Samphantharak; Suranee Koonphol.
4 tables
Palavras-chave: Sorghum; Plant breeding; Selection; Variety trials; Growth; Yields; Pest resistance; Disease resistance; Genetic improvement; Hybrid program; Hybridization; Yield trials; ข้าวฟ่าง; อายุเก็บเกี่ยวสั้น; การต้านทานต่อศัตรูพืช; การปรับปรุงประชากร; โครงการพัฒนาลูกผสม; วิธีการคัดเลือก; การทดสอบผลผลิต.
Ano: 1975
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3819

เจาะลึกคัดเลือกพันธุ์ข้าว Super rice (ตอนที่ 2)
Provedor de dados: Thai Agricultural Research Repository
Autores: Worawit Panichapat.
Tipo: Collection
Palavras-chave: Super rice; Rice breeding; Selection; Hybridization; Hybrid rice; ข้าวลูกผสม; การคัดเลือกพันธุ์; การผสมพันธุ์ข้าว; ความต้านทานต่อแมลง; ความต้านทานต่อโรค; ผลผลิต; ลักษณะทางการเกษตร.
Ano: 2012
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5243

เจาะลึกคัดเลือกพันธุ์ข้าว Super rice (ตอนที่ 1)
Provedor de dados: Thai Agricultural Research Repository
Autores: Worawit Panitchapat.
Tipo: Collection
Palavras-chave: Super rice; Breeding; Selection; Hybridization; Hybrid rice; ข้าวลูกผสม; พันธุ์ผลผลิตสูง; การคัดเลือกพันธุ์; การผสมพันธุ์; ลูกผสมชั่วที่ 2; ความต้านทานต่อแมลง.
Ano: 2012
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5230

การปรับปรุงพันธุ์ข้าวซุปเปอร์ไรซ์
Provedor de dados: Thai Agricultural Research Repository
Autores: Worawit Panitchapat.
Tipo: Collection
Palavras-chave: Rice varieties; Hybridization; Selection; Improvement varieties; ข้าว; พันธุ์ซุปเปอร์ไรซ์; การปรับปรุงพันธุ์; การผสมพันธุ์; วิธีการคัดเลือก; ลักษณะทางการเกษตร.
Ano: 2005
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5295

การสร้างประชากรใหม่ของข้าวนาชลประทานโดยการผสมพันธุ์ ปี 2547
Provedor de dados: Thai Agricultural Research Repository
Autores: Kanchana Klakhaeng; Suniyom Taprab; Rangsit Senghaphan; Krirk Keskosol.
Tipo: Collection
Palavras-chave: Lrrigated rice; Rice breeding; Hybridization; Rice population; ข้าวนาชลประทาน; การผสมพันธุ์ข้าว; ความต้านทานต่อโรค; ความต้านทานต่อแมลง; การสร้างประชากร; พันธุ์ให้ผลผลิตสูง; คุณภาพเมล็ด.
Ano: 2006
URL: http://anchan.lib.ku.ac.th/agnet/handle/123456789/3123

ศักยภาพกล้วยไม้สกุลนางอั้วในเชิงการค้า
Provedor de dados: Thai Agricultural Research Repository
Autores: Phruek Kongsawad; Supas Nusawad; Supapong Sachit; Jongwattana Pumherun.
The ground orchids ‘Pecteilis sp.’ have great potentials for development to commercial scale. This orchid group rest in dry season and flowering in rainy season, less taking care; so, it can be developed to pot plant similar to tulip. This research aims to develop new Thai orchid product for commercial scale by research and development. This work was done at Sisaket Horticulture Research Center during 2006-2011. It was collection of, the orchids ‘Pecteilis sp.’ from natural in north-east Thailand and market, 810 orchid plants included 500 plants of Pecteilis sagarikii and 310 plants of Pecteilis susannae. Moreover, four good parent lines were selected, and a pair of intergeneric hybrid between Pcteilis x Habenaria was bred for commercial scale.
Tipo: PhysicalObject
Palavras-chave: Orchid; Orchidaceae; Pcteilis; Hybridization; Intergeneric; Plant breeding; Selection interspecific; Interspecific hybridization; Intergeneric hybridization; Plant morphology; Production potential; กล้วยไม้ดินสกุลนางอั้ว; พันธุ์การค้า; การรวบรวมพันธุ์; การปรับปรุงพันธุ์; การคัดเลือก; การผสมข้ามสกุล; การผสมข้ามชนิด; ลักษณะทางสัณฐานวิทยา; ศักยภาพการผลิต.
Ano: 2013
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5783

Seed yield of simple and trí-línear corn (Zea mays L.) hybrids for the mexican humid tropics
Provedor de dados: Acta Agronómica
Autores: Macías,Mauro Sierra; Rodríguez Montalvo,Flavio A.; Espinosa Calderón B,Alejandro; Tadeo Robledo,Margarita; Gómez Montiel,Noel Orlando; Vázquez Carrillo,María Griselda; Ugalde Acosta,Francisco Javier; Freyre,Sabel Barrón; Arellano,José Luis Del Rosario; Leyva Ovalle,Otto Raúl; Serna Lagunes,Ricardo; Meza,Pablo Andrés.
Abstract The objective of the work was to evalúate the agronomic performance and seed yield of tropical corn (Zea mays L.) of single and tri-linear crosses. In the spring-summer of 2015 and 2016, two essays were established in the states of Veracruz and Tabasco, Mexico. In the first essay, a group of 12 single crosses was evaluated, and in the second, a group of 18 tri-linear crosses was evaluated. In both essays, the treatments were distributed under a completely randomized block design with three replicates in 5 m long, two-row plots and 0.8 m between rows, with an initial population density of 62.500 plants ha-1. Within the simple cross trial, hybrids HE-3W, COMERCIAL 1, LT-164xLT-165, and HE-1W presented seed yields above the general mean (3384 kg...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Agronomic performance; Genetic variation; Heterosis; Hybridization; Productivity.
Ano: 2021
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122021000200180

Extension of the geographic distribution of Plecturocebus baptista (Pitheciidae, Primates) and a possible hybrid zone with Plecturocebus hoffmannsi: evolutionary and conservation implications
Provedor de dados: Acta Amazonica
Autores: ROCHA,Alessandro; BARNETT,Adrian P.A.; SPIRONELLO,Wilson R.
ABSTRACT Titi monkeys (family Pitheciidae) are Neotropical primates highly diversified in morphology, ecology and genetics, with a wide geographic distribution, including the Amazon, Atlantic Forest, Cerrado, Pantanal and Caatinga. This diversity, together with knowledge gaps, generates uncertainties in titi monkey taxonomy and distribution. An example is Plecturocebus baptista, with only 14 occurrence records and an ill-defined distribution based on untested geographical barriers. Here, we report the occurrence of this species at a new locality outside its known range, across the Paraná-Urariá River, which was considered a distributional limit for the species. The new record implies an overlap of P. baptista with the range of P. hoffmannsi. We document...
Tipo: Info:eu-repo/semantics/report
Palavras-chave: Biogeography; Titi monkeys; Amazon Forest; Hybridization.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672019000400330

Morphological and genetic perspectives of hybridization in two contact zones of closely related species of Petunia (Solanaceae) in southern Brazil
Provedor de dados: Acta Botanica Brasilica
Autores: Teixeira,Marcelo C.; Turchetto,Caroline; Hartke,Sara; Schnitzler,Carolina K.; Freitas,Loreta B.
ABSTRACT Interspecific hybridization has several consequences for parental species, from blurring species limits to the emergence of new taxa. Petunia axillaris and P. exserta occur in sympatry in southernmost Brazil and naturally hybridize despite their different pollination syndromes and habitat requirements. We employed genetic and morphological analyses to characterize two contact zones between the species with the aim of determining the effect of interspecific hybridization. Microsatellite loci and a morphometric evaluation of the corolla shape were used to classify individuals based on their origin as pure parental or hybrids. Corolla color was used to classify individuals a priori (white, red or intermediate, for P. axillaris, P. exserta or hybrid,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Genetic diversity; Hybridization; Introgression; Morphometric analysis; Petunia.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062019000400734

Species boundary and extensive hybridization and introgression in Petunia
Provedor de dados: Acta Botanica Brasilica
Autores: Turchetto,Caroline; Schnitzler,Carolina K.; Freitas,Loreta B.
ABSTRACT Studying the role of hybridization in the speciation of plants is one of the most thrilling areas of evolutionary biology. Hybridization in natural populations can act in opposition to divergence, contribute to adaptation through introgression or foster the emergence of new lineages via hybrid speciation. Species of the plant genus Petunia grow in open areas in southern South America. Some natural interspecific hybrid events have been described for the genus, such as between the endemic P. exserta and the widespread P. axillaris. Both species occur in sympatry in Serra do Sudeste (Brazil), where they occur in diverse habitats and exhibit floral divergence, which has been related to the attraction of different primary pollinators. The present study...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Gene exchange; Hybridization; Inbreeding; Introgression; Microsatellite; Petunia; Species limits.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062019000400724

Evidence of genetic differentiation and karyotype evolution of the sedges Cyperus ligularis L. and C. odoratus L. (Cyperaceae)
Provedor de dados: Acta Botanica Brasilica
Autores: Cruz,Geyner Alves dos Santos; Vasconcelos,Santelmo; Pinangé,Diego Sotero de Barros; Gonçalves-Oliveira,Rodrigo Cesar; Alves,Marccus Vinícius; Torres,Rodrigo Augusto; Benko-Iseppon,Ana Maria.
ABSTRACT The taxonomy of Cyperaceae is complex, with genera like Cyperus harboring species complexes. We analyzed the genetic similarity between Cyperus ligularis L. and C. odoratus L. based on DNA fingerprinting and cytogenetics. Significative genetic differentiation (G ST = 0.363) and low gene flow (N  m = 0.877) indicated a clear genetic distinction between the two species. Moreover, the clustering analysis showed two distinct genetic groups, suggesting a lack of evidence for hybridization. The phenogram revealed two different lineages, and although all individuals of C. odoratus were collected from plots close to each other, they possessed greater genetic diversity than that observed among individuals of C. ligularis, which were sampled over a wider...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Agmatoploidy; DNA amplification fingerprinting; Gene flow; Genetic differentiation; Hybridization.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062018000200264

Serological and molecular tools for strain discrimination of Citrus tristeza virus isolates from Nuevo Leon, Mexico
Provedor de dados: Agrociencia
Autores: Iracheta-Cárdenas,María M.; Almeyda-León,Isidro H.; Cevik,Bayarm; Niblett,Charles L.; Lee,Richard F.; Rocha-Peña,Mario A.
Citrus tristeza virus (CTV) is an important issue to the Mexican citrus industry. CTV infected plants have been reported in 20 citrus producing states of the country as symptomless virus infections, even on plants grafted on the sensitive sour orange rootstock. The detection of severe CTV isolates is mandatory to reinforce the operation of the CTV campaign nationwide. In this study, 13 CTV isolates from Nuevo León and one from Tamaulipas states were characterized for activity against the strain discriminatory MCA13 monoclonal antibody, bi-directional (BD) PCR, and hybridization with specific DNA probes, with RT-PCR amplicons, of the p25 coat protein gene. Ten out of 13 CTV isolates from Nuevo León and the Tamaulipas isolate gave a positive reaction to the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bi-directional PCR; DIBA; Hybridization; MCA 13 monoclonal antibody.
Ano: 2010
URL: http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1405-31952010000400005

Cytogenetics and Molecular Genetic Analysis of Chimerism in Marmosets (Callithrix: Primates)
Provedor de dados: Anais da Academia Brasileira de Ciências
Autores: SILVA,MONIQUE O.M.; ARMADA,JORGE LUÍS A. DE; VERONA,CARLOS EDUARDO S.; HELIODORO,GABRIELA; NOGUEIRA,DENISE M.
ABSTRACT The birth of fraternal twins is a characteristic frequently observed in callitrichids. Cytogenetic studies have demonstrated hematopoietic chimerism in marmosets with the occurrence of two cell lines 2n=46,XX/46,XY in females and males co-twins, without phenotypic changes. Amplification by PCR have also been used to verify the presence of the SRY gene in female chimaeras. Our aim was to verify the occurrence of chimerism in Callithrix sp. individuals considered as hybrids according to their intermediate phenotypes between C. jacchus and C. penicillata. Blood samples from 37 Callithrix sp. individuals were collected. Hematopoietic chimerism 2n=46,XX/46,XY was detected by cytogenetic analysis in five individuals, three males and two females. A...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Karyotype; SRY; Chimaeras; Hybridization.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000602793

Floral biology of cacauhy (Theobroma speciosum - Malvaceae)
Provedor de dados: Brazilian Archives of Biology and Technology
Autores: Souza,Márcio Silva de; Venturieri,Giorgini Augusto.
In the present work, cacauhy's (Theobroma speciosum) floral biology was studied. Flower buds split their sepals at 14h reaching its maximum at 22h, but all flowers were fully opened at 6:00 h of the following morning. Stigmatic branches showed exudates, reaching maximum between 6:00 h and 10:00 h at the same day. Ligules and petal hoods were the floral parts with highest intensity of odour. Flowers were receptive along all the morning and noon of the anthesis day. Approximately 65% of the flowers were naturally pollinated, but only 0.85% of them set a fruit. Abscission occurred on its higher frequency at 6:00 h of the second day after anthesis. Controlled pollinations showed that cacauhy was self-incompatible species.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Self-incompatibility; Flower behavior; Hybridization; Cocoa.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000400016

Forage characters of different Paspalum species in Rio Grande do Sul: a meta-analysis
Provedor de dados: Ciência Rural
Autores: Graminho,Larissa Arnhold; Dall’Agnol,Miguel; Pötter,Luciana; Lopes,Rodrigo Ramos; Simioni,Carine; Weiler,Roberto Luís.
ABSTRACT: The objective of this study was to evaluate, through meta-analysis, the forage characteristics of various species of the genus Paspalum and to use them to select the best ecotypes that can be used in artificial hybridization as parents and hybrids for pasture production and natural pasture recovery systems. Data were obtained from studies conducted by the Department of Forage Plants and Agrometeorology of the Universidade Federal do Rio Grande do Sul. Database comprised tests conducted with ecotypes and/or hybrids of Paspalum spp. in plots for evaluating total dry mass production, leaf dry mass production, and stem dry mass production by means of cuts. Total dry mass production, which included leaves and stems, differed between the ecotypes and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Apomixis; Hybridization; Plant breeding; Natural pasture; Variability.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000700651

Forage performance of  Paspalum hybrids from an interspecific cross
Provedor de dados: Ciência Rural
Autores: Motta,Eder Alexandre Minski da; Dall'Agnol,Miguel; Nascimento,Felipe Link; Pereira,Emerson André; Machado,Juliana Medianeira; Barbosa,Marlon Risso; Simioni,Carine; Ferreira,Priscila Becker.
ABSTRACT: The goal of this study was to assess the variability of Paspalum plicatulum x  P. guenoarum interspecific hybrids in terms of agronomic performance and their tolerance to cold conditions, as well as to estimate the correlation of different phenotypic characters associated with forage production. Twenty hybrids plants were used, besides one access P. guenoarum , one of P. plicatulum and the cultivar 'Pensacola' ( P. notatum ). Assessments were performed on individual plants, in a completely randomized design with five repetitions. Paspalum genotypes presented variability in total dry matter, leaf dry mass, leaf: stem ratio, and tolerance to cold. We suggest selection of the hybrids 08Q01 and 08Q44 for new stages within a forage improvement...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Apomixis; Native grasses; Hybridization.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000601025

In vivo fertilization of banana
Provedor de dados: Ciência Rural
Autores: Soares,Taliane Leila; Souza,Everton Hilo de; Costa,Maria Angélica Pereira de Carvalho; Silva,Sebastião de Oliveira e; Serejo,Janay Almeida dos Santos.
The aim of this research was to study the in vivo fertilization process of banana cultivars. The diploid hybrid (AA) 091087-01 was the male progenitor. Flower samples were checked for fertilization from the first to the twentieth day after pollination. The size of the diploid ovules increased gradually at the beginning of the seed formation process. On the other hand, in the AAA triploids (Cavendish subgroup), the not fertilized ovules were aborted. In the AAB triploids (Prata subgroup) some ovules were fertilized. The flowers of Grand Naine, Nanicão and 'Pacovan' cultivars presented necrosis in the distal part of the ovary on the first day after pollination. Necrosis can hinder pollen tube growth towards the ovule, which might be related to the low seed...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Musa spp. L.; Genetic improvement; Hybridization; Ovules.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782014000100007