|
|
|
| Registros recuperados: 70 | |
|
|
| 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 |
| |
|
|
| 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 |
| |
|
| |
|
|
| 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 |
| |
|
|
| 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 |
| |
|
|
| 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 |
| |
|
| |
|
|
| 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 |
| |
|
|
| 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 |
| |
|
| |
| Registros recuperados: 70 | |
|
|
|
