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| Registros recuperados: 28 | |
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| Albuquerque, Amanda Nogueira de; Universidade do Estado do Mato Grosso; Barelli, Marco Antônio Aparecido; Universidade do Estado do Mato Grosso; Neves, Leonarda Grillo; Universidade do Estado do Mato Grosso; Arantes, Vinícius Ribeiro; Universidade do Estado do Mato Grosso; Silva, kleberson Luiz Miranda da; Universidade do Estado do Mato Grosso. |
| The morphologic traits of the common bean genotype (Phaseolus vulgaris L.) in Cáceres MT, Brazil, are evaluated to optimize genotypes for future improvement breeding cultures. Sixteen genotypes were evaluated through 33 morphological characters. The experiment was carried out in randomized blocks with four replicates at the Mato Grosso Company for Research and Extension (EMPAER) in Cáceres, Mato Grosso State. A dendrogram was produced by Unweighted Pair Group Method with Arithmetic Mean (UPGMA) and Plan projection. Results showed the occurrence of genetic variability among the genotypes and the dendrogram revealed the formation of two main groups, one comprised genotypes of the black group and the other comprised genotypes of the Cores and Carioca group,... |
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Palavras-chave: 5.01.03.05-9 Phaseolus vulgaris; Morphological description; UPGMA; Genetic divergence Melhoramento Vegetal Phaseolus vulgaris; Morphological description; UPGMA; Genetic divergence. |
| Ano: 2011 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/6944 |
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| Lupchinski Junior, Enio; UEM; Vargas, Lauro; UEM; Povh, Jayme Aparecido; UEM; Ribeiro, Ricardo Pereira; UEM; Mangolin, Claudete Aparecida; UEM; Barrero, Nelson Maurício Lopera; UEM. |
| Este trabalho teve como objetivo analisar, pela técnica RAPD, a variabilidade e a divergência genética de duas gerações da linhagem GIFT. Foram estimados parâmetros para os reprodutores (G0) e para a progênie (F1). A variabilidade genética foi determinada pela porcentagem de loci polimórficos e pelo índice de Shannon. As gerações apresentaram 69,6% de loci polimórficos (G0) e 60,0% de polimorfismo (F1). Os valores para o índice de Shannon foram de 0,367 para a geração G0 e de 0,317 para a F1. Os valores de divergência genética, calculados pelo teste de Mantel, foram de 0,213 para a G0 e 0,208 para a geração F1. Os resultados obtidos indicaram que houve perda da variabilidade genética da geração G0 para a F1. No entanto, um fato a ser destacado foi a alta... |
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Palavras-chave: 5.05.04.00-2 Reprodução Animal índice de Shannon; Gerações de cultivo; Divergência genética; Variabilidade genética. Shannon index; Cultivated generations; Genetic divergence; Genetic variability. |
| Ano: 2008 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/4708 |
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| Rufino,Elcio Rodrigo; Siqueira,Walter José; Marques,Márcia Ortiz Maio; Colombo,Carlos Augusto; Azevedo Filho,Joaquim Adelino; Martins,Antônio Lúcio Melo. |
| The aromatic and medicinal species Lippia alba is vigorous and rugged native to the South America (Atlantic Rainforest). Because it is an allogamous and self-incompatible species, natural populations have high morphological and chemical variability. This work had as objective to conduct a preliminary screening to identify new promising clones from a novel (recombinant) base population of Lippia alba with regard to its agronomic and phytochemical traits, using the linalool oil or chemotype as model. The two superior linalool clones, obtained by collection, were used as controls. Traits evaluated included: dry mass of leaves (DML), oil yield percentage (EOY%), oil production per plant (OP), and linalool percentage (LN%). Forty linalool chemotype clones were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Verbenaceae; Oil linalool; Genetic divergence; Clone selection; Plant breeding. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052012000200002 |
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| Meira,Daniela; Meier,Carine; Olivoto,Tiago; Nardino,Maicon; Klein,Luís Antônio; Moro,Ederson Duranti; Fassini,Fabrício; Marchioro,Volmir Sergio; Souza,Velci Queiróz de. |
| ABSTRACT The aims of this study were to characterize black oat populations by estimating between- and within-populations variance components and genetic parameters, as well as to distinguish the populations using multivariable statistics. The experiment was carried out in randomized blocks design with three repetitions, with 14 black oat populations collected in several municipalities of Rio Grande do Sul state. Agronomic important traits were assessed at physiological maturation stage. Variance components and genetic parameters were estimated considering within-block information. In addition, Mahalanobis distance, relative contribution of traits, and canonical variables were used to distinguish the populations. Selection based on panicle length, number of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Avena strigosa; Genetic divergence; Genotypic variance. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052019000100043 |
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| Carpentieri-Pípolo,Valéria; Pípolo,Antônio Eduardo; Silva,Flávio André Martins da; Petek,Marcos Rafael. |
| Thirty-four soybean lines were assessed for twelve traits. The genetic distances were estimates using multivariate techniques, to identify parents to be included in breeding programs for hybridization. Grouping by the Tocher method, from generalized Mahalanobis distances, divided the 34 lines into four groups. The most important agronomic traits, weight of seeds per plot, plant height, height of first pod and days to maturity were considered when recommending for crossing. The following crosses were recommended based on the genetic divergence and the key agronomic traits: lines 23, 10, 2, 27 and 25 (group I) with genotype 6 (group II) and genotype 16 (group III). Thus only ten crosses would be made, representing only 2% of the total crosses which could be... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soybean; Genetic divergence; Mahalanobis; Multivariate analysis. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132000000300008 |
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| Vieira,Eduardo Alano; Carvalho,Fernando Irajá Félix de; Bertan,Ivandro; Kopp,Mauricio Marini; Zimmer,Paulo Dejalma; Benin,Giovani; Silva,José Antônio Gonzalez da; Hartwig,Irineu; Malone,Gaspar; Oliveira,Antônio Costa de. |
| Molecular and morphological data analyses matrices are very informative tools for the estimation of genetic distances. We used AFLP markers, morphological traits and combined analysis to estimate the genetic distances between wheat genotypes and ascertain any associations between the two techneques. Nineteen wheat (Triticum aestivum L.) genotypes were analyzed using amplified fragment length polymorphism (AFLP) markers and field evaluated for two years. The matrices obtained by morphological and molecular marker data analyses revealed a significant but moderate correlation (r = 0.47), indicating that such techniques sample distinct genome regions. The combined analysis was found to be highly correlated with AFLP (r = 0.97) and moderately correlated with... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Reeding; Genetic divergence; Molecular markers; Morphological traits. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572007000300016 |
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| Techio,Vânia Helena; Davide,Lisete Chamma; Pereira,Antônio Vander; Bearzoti,Eduardo. |
| Cytotaxonomic studies were carried out on 26 accessions of Pennisetum spp. originating from the Active Germplasm Bank of Embrapa Gado de Leite-Juiz de Fora, Minas Gerais, Brazil.This study presents cytogenetics and reproductive morphological data for each one of these accessions, which allowed groupings and suggest botanical identifications to be established. The metaphases of the accessions characterized as P. purpureum confirmed the presence of 2n = 28 chromosomes that have already been described for this species. For the hybrids between P. purpureum and P. glaucum and for the hexaploids, resulting from the chromosome duplication of these hybrids, 2n = 21 and 2n = 42 chromosomes were confirmed, respectively. The wild accession identified as P. setosum... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pennisetum; Cytogenetic; Taxonomy; Germplasm; Genetic divergence. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572002000200014 |
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| Soares,Sabrina Delgado; Bandeira,Ludmila Ferreira; Ribeiro,Stela Barros; Telles,Mariana Pires de Campos; Silva,João Augusto da; Borges,Canrobert Tormin; Coelho,Alexandre Siqueira Guedes; Novaes,Evandro. |
| Abstract Given its high-valued wood, the African mahogany (Khaya grandifoliola) has been envisaged as a renewable source of tropical hardwoods in Brazil. However, there are concerns about the hypothesized low diversity among the few K. grandifoliola germplasm sources introduced in the country. Using eight microsatellite markers, we evaluated the genetic diversity and divergence among 53 superior trees selected from three provenances of K. grandifoliola located in the state of Para. These populations are among the oldest plantations (>15 years) in Brazil and, therefore, the country's main seed sources. The average number of alleles per locus was 5.9, expected heterozygosity was moderate (^=0.56) and lower than the high observed heterozygosity (HO=0.74).... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Microsatellites; SSR; Genetic structure; Genetic divergence; Hardwood. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572020000400301 |
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| Meyer,Andréia da Silva; Garcia,Antonio Augusto Franco; Souza,Anete Pereira de; Souza Jr.,Cláudio Lopes de. |
| The objective of this study was to evaluate whether different similarity coefficients used with dominant markers can influence the results of cluster analysis, using eighteen inbred lines of maize from two different populations, BR-105 and BR-106. These were analyzed by AFLP and RAPD markers and eight similarity coefficients were calculated: Jaccard, Sorensen-Dice, Anderberg, Ochiai, Simple-matching, Rogers and Tanimoto, Ochiai II and Russel and Rao. The similarity matrices obtained were compared by the Spearman correlation, cluster analysis with dendrograms (UPGMA, WPGMA, Single Linkage, Complete Linkage and Neighbour-Joining methods), the consensus fork index between all pairs of dendrograms, groups obtained through the Tocher optimization procedure and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Genetic divergence; Heterotic groups; AFLP; RAPD; Multivariate analysis. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572004000100014 |
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| Oliveira,Rosana de Cássia; Nunes,Francis de Morais Franco; Campos,Ana Paula Soraggi; Vasconcelos,Soraya Matos de; Roubik,David; Goulart,Luiz Ricardo; Kerr,Warwick Estevam. |
| One of the commonest neotropical stingless bees is Tetragonisca angustula (Latreille, 1811), popularly known in Portuguese as jataí, which occurs in variable nesting sites from Mexico to Argentina. We used 18 primers to generate 218 RAPD markers which we used to determined the genetic distance between T. angustula populations from 25 localities in three different Latin America countries, using Tetragonisca weyrauchi from the Brazilian state of Acre and the common honey bee (Apis mellifera) as outgroups. Genetic distance, calculated as the Percentage of Dissimilarity (14%), based on all markers divided the T. angustula population into eastern (group 1) and western (group 2) groups. However, we were able to separate the two groups by using only two primers... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Tetragonisca angustula; Genetic divergence; Molecular markers; UPGMA. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572004000200009 |
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| Tavares,Mara Garcia; Dias,Luiz Antonio dos Santos; Borges,Andréia Arantes; Lopes,Denilce Meneses; Busse,Angélica Helene Pereira; Costa,Ronaldo Guimarães; Salomão,Tânia Maria Fernandes; Campos,Lucio Antonio de Oliveira. |
| Allozyme, microsatellite and random amplified polymorphic DNA (RAPD) molecular markers were used to investigate the within and between population genetic variability and between population genetic differentiation of the Brazilian stingless bee uruçu amarela (nominally Melipona rufiventris Lepeletier, 1836) present in savanna and Atlantic forest habitats of the Brazilian state of Minas Gerais (MG). We found low levels of within population variability, although there were a large number of private alleles that specifically characterized these populations. The F ST values indicated a high level of genetic diversity between populations. Analysis of molecular variance (AMOVA) showed a high degree of population differentiation between the savanna and Atlantic... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Endangered species; Genetic divergence; Molecular markers; Stingless bees; Uruçu amarela. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572007000400027 |
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| Arnaud-haond, Sophie; Moalic, Yann; Hernandez-garcia, Emilio; Eguiluz, Victor M.; Alberto, Filipe; Serrao, Ester A.; Duarte, Carlos M.. |
| The recurrent lack of isolation by distance reported at regional scale in seagrass species was recently suggested to stem from stochastic events of large-scale dispersal. We explored the usefulness of phylogenetic information contained in microsatellite loci to test this hypothesis by using the Genetic Diversity Spectrum (GDS) on databases containing, respectively, 7 and 9 microsatellites genotypes for 1541 sampling units of Posidonia oceanica and 1647 of Cymodocea nodosa. The simultaneous increase of microsatellite and geographic distances that emerges reveals a coherent pattern of isolation by distance in contrast to the chaotic pattern previously described using allele frequencies, in particular, for the long-lived P. oceanica. These results suggest... |
| Tipo: Text |
Palavras-chave: Clonality; Genetic Diversity Spectrum; Genetic divergence; Microsatellites; Seagrass; Stepwise mutation. |
| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00182/29292/27733.pdf |
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| Rota, E.; Martinsson, S.; Bartoli, M.; Beylich, A.; Graefe, U.; Laini, A.; Wetzel, M.J.; Erséus, C.. |
| We analysed samples of Sparganophilus taken at the corners of its distribution area in Europe (UK, Germany and Italy). No mitochondrial genetic divergence within and amongst them was found, neither in COI nor in 16S. Further, the COI haplotype was also identical to two sequences from Ontario, Canada in the Barcoding of Life Data System (BOLD) database. Our European COI and 16S sequences showed only minimal differentiation (only 1 or 2 substitutions) from specimens newly collected in Illinois and Washington states (USA), as well as from a COI haplotype from Tennessee (USA) in BOLD. An additional COI haplotype from Illinois (found in BOLD) is 2.1% different from the other haplotypes but clearly belongs to the same lineage of Sparganophilus. This... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Aquatic megadriles; Genetic divergence; Oligochaeta; Recent introduction; Sparganophilus eiseni; Synonymy. |
| Ano: 2016 |
URL: http://www.repository.naturalis.nl/record/607666 |
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| Scheepmaker, Maarten. |
| Genetic differentiation among population samples of G. gauthieri on both sides of the Strait of Gibraltar was investigated by enzyme electrophoresis at 20 enzyme loci with reference to G. gauthieri and G. ibericus from different areas in the Iberian peninsula. Levels of divergence resolved suggest that G. gauthieri reached North Africa from the Iberian peninsula, and not vice versa. With reference to geological evidence, this was likely to occur during the Messinian (6—5 My ago). As the opening of the Strait of Gibraltar represents a well dated geological event, an attempt has been made to calibrate the molecular clock for the G. pulex-group. Indirect estimations of gene flow levels were shown to be extremely low. Probably as a consequence of frequently... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Distribution; Genetic divergence; Gene flow; Molecular clock; Gammarus. |
| Ano: 1990 |
URL: http://www.repository.naturalis.nl/record/503962 |
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| Registros recuperados: 28 | |
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