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Registros recuperados: 18
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Altitudinal genetic variation among Pinus patula populations from Oaxaca, México, in growth chambers simulating global warming temperatures Agrociencia
Sáenz-Romero,Cuauhtémoc; Beaulieu,Jean; Rehfeldt,Gerald E..
Climatic change will decouple the matching between genotypes and environments. Studying the patterning of genetic variation among pine populations along altitudinal gradients under simulated climatic change temperatures, would provide insights about how to realign the present populations to future environments. Fourteen Pinus patula populations from the forests of the Native Indian Community of Ixtlán de Juárez, state of Oaxaca, México, were collected in January-March 2005 and 2006 along an altitudinal gradient (2400 m to 3050 m, one population every 50 m of altitudinal difference). Seedlings were grown in growth chambers at the Laurentides Forestry Center, Quebec city, Canada, under two temperature treatments aiming to simulate: contemporary temperature...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Altitudinal gradients; Altitudinal seed zoning; Assisted migration; Climate change; Genetic differentiation.
Ano: 2011 URL: http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1405-31952011000300012
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Análisis de la diversidad genética de variedades nativas de chile "Poblano" por medio de microsatélites. Colegio de Postgraduados
Contreras Toledo, Aremi Rebeca.
A partir de la domesticación de chile (Capsicum annuum L.) en México, se ha generado una gran diversidad dentro de esta especie en nuestro país, derivada de la selección de los agricultores para diferentes usos, siendo el chile Poblano uno de los más importantes y el más representativo del Estado de Puebla; sin embargo, el rendimiento de chile poblano en esta región ha presentado una reducción en los últimos años, debido, en parte, a la falta de semilla mejorada que debe ser seleccionada con base en las necesidades de los propios productores, existiendo la potencial pérdida de este germoplasma. Los objetivos de este estudio fueron estimar la diversidad genética y determinar sus posibles patrones de distribución, diferenciar grupos genéticos de variedades y...
Palavras-chave: Capsicum annuum; SSR; Polimorfismo; Diferenciación genética; Polymorphism; Genetic differentiation; Maestría; Genética.
Ano: 2011 URL: http://hdl.handle.net/10521/400
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Análisis de la diversidad genética de variedades nativas de chile "Poblano" por medio de microsatélites. Colegio de Postgraduados
Contreras Toledo, Aremi Rebeca.
A partir de la domesticación de chile (Capsicum annuum L.) en México, se ha generado una gran diversidad dentro de esta especie en nuestro país, derivada de la selección de los agricultores para diferentes usos, siendo el chile Poblano uno de los más importantes y el más representativo del Estado de Puebla; sin embargo, el rendimiento de chile poblano en esta región ha presentado una reducción en los últimos años, debido, en parte, a la falta de semilla mejorada que debe ser seleccionada con base en las necesidades de los propios productores, existiendo la potencial pérdida de este germoplasma. Los objetivos de este estudio fueron estimar la diversidad genética y determinar sus posibles patrones de distribución, diferenciar grupos genéticos de variedades y...
Palavras-chave: Capsicum annuum; SSR; Polimorfismo; Diferenciación genética; Polymorphism; Genetic differentiation; Maestría; Genética.
Ano: 2011 URL: http://hdl.handle.net/10521/400
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Bayesian analysis of the genetic structure of a Brazilian popcorn germplasm using data from simple sequence repeats (SSR) Chilean J. Agric. Res.
Saavedra,Javier; Silva,Tereza Aparecida; Mora,Freddy; Scapim,Carlos Alberto.
Several studies have confirmed that popcorn (Zea mays L. var. everta) has a narrow genetic basis, which affects the quality of breeding programs. In this study, we present a genetic characterization of 420 individuals representing 28 popcorn populations from Brazilian germplasm banks. All individuals were genotyped using 11 microsatellite markers from the Maize Genetics and Genomics Database. A Bayesian clustering approach via Monte Carlo Markov chains was performed to examine the genetic differentiation (Fst values) among different clusters. The results indicate the existence of three distinct and strongly differentiated genetic groups (K = 3). Moreover, the Fst values (calculated among clusters) were significantly different according to Bayesian credible...
Tipo: Journal article Palavras-chave: Genetic differentiation; Microsatellite markers; Bayesian clustering; Monte Carlo Markov chains.
Ano: 2013 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392013000200003
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Diversidade genética estimada com marcadores ISSR em populações brasileiras de Zabrotes subfasciatus. Repositório Alice
SOUZA, G.A. de; CARVALHO, M.R. de O.; MARTINS, E.R.; GUEDES, R.N.C.; OLIVEIRA, L.O. de..
O objetivo deste trabalho foi estimar a diversidade genética de populações de Zabrotes subfasciatus, por meio de marcadores moleculares ISSR. Foram avaliadas 12 populações, provenientes de oito estados brasileiros, no total de 269 indivíduos. Cinco iniciadores ISSR permitiram a obtenção do total de 51 fragmentos polimórficos. A percentagem média de locos polimórficos, dentro de cada população, foi de 83,8%. A heterozigosidade corrigida de Nei esperada variou de 0,23 a 0,33, com média de 0,29, e o índice de diversidade genética de Shannon e Weaver variou de 0,29 a 0,48, com média de 0,42. No nível de espécie, estes dois índices apresentaram valores de 0,36 e 0,54, respectivamente. A análise de variância molecular mostrou que 66% da variância molecular total...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Caruncho-do-feijão; Diferenciação genética; Índice de diversidade genética; Marcadores ISSR; Bean bruchid; Genetic differentiation; Genetic diversity index; ISSR markers.
Ano: 2008 URL: http://www.alice.cnptia.embrapa.br/handle/doc/122102
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Evidence of genetic differentiation and karyotype evolution of the sedges Cyperus ligularis L. and C. odoratus L. (Cyperaceae) Acta Botanica
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
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Genetic and ecological niche modeling of Calydorea crocoides (Iridaceae): an endemic species of Subtropical Highland Grasslands Genet. Mol. Biol.
de Alencar,Juliana Lustosa Matos; Kaltchuk-Santos,Eliane; Fachinetto,Juliana; Tacuatiá,Luana Olinda; Forni-Martins,Eliana Regina; Stiehl-Alves,Eudes Maria; de Souza-Chies,Tatiana Teixeira.
Abstract Evolutionary analyses have been widely used for evaluation of genetic diversity of natural populations and correlate these data to the fitness of the species, especially in the case of threatened species. Calydorea crocoides occurs in a restricted area at altitudes from 800 to 1500 m in southern Brazil and is considered endangered. A study assessing genetic diversity, cytogenetic features and ecological niche was performed aiming to characterize C. crocoides by multidisciplinary approaches. Molecular data highlighted that most of the total variation (76%; p < 0.001) was found within populations and the parameters of genetic diversity were high at the species level (PPB = 98.97%; I = 0.4319; h = 0.2821). Gene flow (Nm) was estimated in 0.97...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Genetic differentiation; ISSR markers; Pollen viability; Cytogenetic analyses; Restricted distributed species.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572018000200327
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Genetic and morphological variation in corallivorous snails (Coralliophila spp.) living on different host corals at Curaçao, southern Caribbean Naturalis
Potkamp, G.; Vermeij, M.J.A.; Hoeksema, B.W..
Snails of the genus Coralliophila (Muricidae: Coralliophilinae) are common corallivores in the Caribbean, feeding on a wide range of host species. In the present study, the morphological and genetic variation in C. galea and C. caribaea were studied in relation to their association with host coral species at Curaçao. Differences in shell shape among snails living on different hosts were quantified using geometric morphometric and phylogenetic relationships were studied using two mitochondrial markers (12S and COI). Based on these analyses, a new species, C. curacaoensis sp. nov., was found in association with the scleractinian coral Madracis auretenra. Both C. galea and C. caribaea showed host-specific differences in shell shape, size, and shell allometry...
Tipo: Article / Letter to the editor Palavras-chave: Genetic differentiation; Phylogenetics; 12S; COI; Corallivory; Morphology; Geometric morphometrics; Host race.
Ano: 2017 URL: http://www.repository.naturalis.nl/record/630190
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Genetic differentiation of Macrodon ancylodon (Sciaenidae, Perciformes) populations in Atlantic coastal waters of South America as revealed by mtDNA analysis Genet. Mol. Biol.
Santos,Simôni; Schneider,Horacio; Sampaio,Iracilda.
The king weakfish (pescada-gó in Portuguese - Macrodon ancylodon (Sciaenidae), a demersal (bottom-feeding) species found in South America Atlantic coastal waters from the Gulf of Paria in Venezuela to Baia Blanca in Argentina, is an economically important species because of its abundance and wide acceptance by consumers. Because of its wide distribution this fish may be subject to geographic isolation and this may have resulted in distinct populations along its coastal range. Considering that this species represents an important economic resource, confirmation of whether M. ancylodon is a single species or there are different genetic stocks spread over its wide distribution would be an important contribution to conservation policies and population...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Macrodon ancylodon; Sciaenidae; Perciformes; 16S rRNA; Cytochrome b; Genetic differentiation.
Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572003000200008
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Genetic divergence between Melipona quadrifasciata Lepeletier (Hymenoptera, Apidae) populations Genet. Mol. Biol.
Tavares,Mara Garcia; Pietrani,Nathalia Teixeira; Durvale,Maxwell de Castro; Resende,Helder Canto; Campos,Lucio Antonio de Oliveira.
Melipona quadrifasciata is a stingless bee widely found throughout the Brazilian territory, with two recognized subspecies, M. quadrifasciata anthidioides, that exhibits interrupted metasomal stripes, and M. quadrifasciata quadrifasciata, with continuous metasomal stripes. This study aimed to estimate the genetic variability of these subspecies. For this purpose, 127 colonies from 15 Brazilian localities were analyzed, using nine species-specific microsatellite primers. At these loci, the number of alleles ranged from three to 15 (mean: 7.2), and the observed heterozygosity (Ho) ranged from 0.03-0.21, while the expected heterozygosity (He) ranged from 0.23-0.47. The genetic distances among populations ranged from 0.03-0.45. The F ST multilocus value (0.23)...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Genetic differentiation; Microsatellites; Population genetics; Stingless bees.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572013000100016
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Genetic diversity between native and improved Cattleya walkeriana Gardner famous clones Agronomy
Tambarussi, Evandro Vagner; Ann Veasey, Elizabeth; Menezes, Lou; Ibañes, Bruna; Lombardi, Kátia Cylene; Vencovsky, Roland.
The aim of this study was to evaluate the genetic diversity among native plants and some individuals obtained from crosses with unknown genealogy of C. walkeriana as well as C. loddigesii and C. nobilior and to advance towards solving the question of the genetic purity of the “Orchidglade” clone. Eight microsatellite loci were used to evaluate the genetic diversity between individuals of C. walkeriana. Microsatellites were not efficient in determining the genetic diversity between C. walkeriana groups (native and improved). The difficulty in determining the genetic distance between the different genotypes can be attributed to the complex mating system of the species and to a weak genetic barrier that facilitates the development of hybrids. Our analysis...
Tipo: Info:eu-repo/semantics/article Palavras-chave: 2.02.03.00-4 orchid improvement; Genetic variation; Genetic differentiation; Cattleya loddigesii; Cattleya nobilior; Melhoramento vegetal.
Ano: 2017 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/32520
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Haplotype identification within Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae) corn and rice strains from Colombia Neotropical Entomology
Salinas-Hernandez,H; Saldamando-Benjumea,CI.
The fall army worm Spodoptera frugiperda (Smith) is a migratory important pest of corn, sorghum, rice, grass and bermudagrass in North and South America. This species has diverged into two genetically differentiated but morphologically identical strains, "the rice" and "the corn". They have been analyzed by sequencing the genes cytochrome oxydase I, II and ITS1 from populations from the United States and Brazil. However, no such studies were performed in Colombia. In here, we identified 43 haplotypes by sequencing a fragment of the COI gene from 102 individuals, of which 40 had already been identified as the "corn" and "rice" strains or to their hybrids from Tolima, and the rest were collected from corn, cotton, sorghum, grass and rice fields in other...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Genetic differentiation; Host plant; Monitoring.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2011000400002
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Microsatellite marker discovery in the stingless bee Uruçu-Amarela (Melipona rufiventris Group, Hymenoptera, Meliponini) for population genetic analysis. Repositório Alice
NEGREIROS, A. B.; SILVA, G. R.; OLIVEIRA, F. A. S.; RESENDE, H. C.; FERNANDES-SALOMÃO, T. M.; MAGGIONI, R.; PEREIRA, F. de M.; SOUZA, B. de A.; LOPES, M. T. do R.; DINIZ, F. M..
The species Melipona rufiventris Lepeletier, 1836 is a Brazilian native stingless bee that is part of a species complex known as the 'rufiventris group', making it diffcult to distinguish between the different species. Populations in this group are facing a severe decline, leading to the risk of local extinction, and therefore, their conservation should be treated as a major concern.
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Diferenciação genética; Genética populacional; NGS technology; Genetic differentiation; Conservação; Marcador Molecular; Population genetics.
Ano: 2019 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1117005
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Mitochondrial genetic variability of Didelphis albiventris (Didelphimorphia, Didelphidae) in Brazilian localities Genet. Mol. Biol.
Sousa,Luciene C.C.; Gontijo,Célia M.F.; Botelho,Helbert A.; Fonseca,Cleusa G..
Didelphis albiventris is a well-known and common marsupial. Due to its high adaptability, this very widespread generalist species occurs under various environmental conditions, this even including protected regions and disturbed urban areas. We studied a 653 bp fragment of cytochrome oxidase c (COI) from 93 biological samples from seven Brazilian localities, with linear distances ranging between 58 and about 1800 km to analyze the effects of geographic distances on variability and genetic differentiation. The haplotype network presented nine haplotypes and two genetic clusters compatible with the two most distant geographic areas of the states of Minas Gerais, in the southeast, and Rio Grande do Sul, in the extreme south. As each cluster was characterized...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Didelphis albiventris; Marsupial; Variability; COI; Genetic differentiation.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572012000300020
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Natural hybridization between genetically differentiated populations of Crassostrea gigas and C-angulata highlighted by sequence variation in flanking regions of a microsatellite locus ArchiMer
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
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No differences ingenetic diversity of Cotoneaster franchetii (Rosaceae) shrubs betweennative and non-native ranges Boletín de la Sociedad
Lett,Irene; Hensen,Isabell; Hirsch,Heidi; Renison,Daniel.
It is commonly assumed that plants have more genetic diversity in their native range than in areas where they have been introduced due to founder effects. However, few studies have proven this assumption and included the comparison between non-native and native ranges. We analyzed AFLP fingerprint patterns of 149 individuals from five native (China) and five non-native (Argentina) populations of Cotoneaster franchetii, a shrub which successfully invades different habitats and forms extensive monospecific stands. We compared genetic diversity estimates and assessed genetic differentiation among populations by inspecting FST values and conducting a PCoA, an AMOVA and a Mantel test. No evidence was found for reduced genetic diversity in non-native populations...
Tipo: Info:eu-repo/semantics/article Palavras-chave: AFLP; Argentina; Biological invasion; China; Genetic differentiation; Multiple introductions.
Ano: 2015 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-23722015000300010
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The marine brooder Excirolana braziliensis (Crustacea: Isopoda) is also a complex of cryptic species on the coast of Chile RChHN
VARELA,ANDREA I; HAYE,PILAR A.
Speciation is a direct consequence of isolated populations in taxa with low dispersal potential. The brooding crustacean Excirolana braziliensis, with a presumably wide geographic range of distribution (~16° N-41° S in the Pacific and ~19° N-35° S in the Atlantic), has been detected to correspond to cryptic species on the coast of Panama. Latitudinal variations in reproductive features in E. braziliensis have been attributed to phenotypic plasticity, however, the differences may be the result of divergent populations. Considering that the taxon has been reported to be a complex of cryptic species in other geographic areas and given the phenotypic differences detected along its distribution range, we hypothesized that E. braziliensis is a complex of species...
Tipo: Journal article Palavras-chave: Cryptic species; Genetic differentiation; Genetic distance; Marine peracarids; Phylogenetics.
Ano: 2012 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2012000400011
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Variation and genetic structure of Melipona quadrifasciata Lepeletier (Hymenoptera, Apidae) populations based on ISSR pattern Genet. Mol. Biol.
Nascimento,Marcília A.; Batalha-Filho,Henrique; Waldschmidt,Ana M.; Tavares,Mara G.; Campos,Lucio A.O.; Salomão,Tânia M.F..
For a study of diversity and genetic structuring in Melipona quadrifasciata, 61 colonies were collected in eight locations in the state of Minas Gerais, Brazil. By means of PCR analysis, 119 ISSR bands were obtained, 80 (68%) being polymorphic. He and H B were 0.20 and 0.16, respectively. Two large groups were obtained by the UPGMA method, one formed by individuals from Januária, Urucuia, Rio Vermelho and Caeté and the other by individuals from São João Del Rei, Barbacena, Ressaquinha and Cristiano Otoni. The Φst and θB values were 0.65 and 0.58, respectively, thereby indicating high population structuring. UPGMA grouping did not reveal genetic structuring of M. quadrifasciata in function of the tergite stripe pattern. The significant correlation between...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Hymenoptera; Melipona; Genetic differentiation; ISSR markers; Population structure.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572010000200031
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