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Registro Completo |
Biblioteca(s): |
Embrapa Amazônia Oriental; Embrapa Meio-Norte. |
Data corrente: |
30/11/2015 |
Data da última atualização: |
26/05/2022 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
MENDES, R. F. M.; BRITTO, F. B.; FREIRE FILHO, F. R.; LIMA, P. S. da C. |
Afiliação: |
R. F. M. Mendes, Universidade Federal do Piauí, Campus Universitário Ministro Petrônio Portella, Ininga, 64049-550, Teresina, PI; F. B. Britto, Universidade Federal do Piauí, Campus Universitário Ministro Petrônio Portella, Ininga, 64049-550, Teresina, PI; FRANCISCO RODRIGUES FREIRE FILHO, CPATU; PAULO SARMANHO DA COSTA LIMA, CPAMN. |
Título: |
Genetic variability of indigenous cowpea genotypes as determined using inter-simple sequence repeats markers. |
Ano de publicação: |
2015 |
Fonte/Imprenta: |
African Journal of Biotechnology, Nairobi, v. 14, n. 36, p. 2652-2661, Sep. 2015. |
DOI: |
10.5897/AJB2015.14671 |
Idioma: |
Inglês |
Conteúdo: |
Cowpea [Vigna unguiculata (L.) Walp.] is cultivated widely by small farmers in the semiarid region of Northeastern Brazil for subsistence purposes, especially to complement the family income. However, owing to the limited availability of water in this region, there is an urgent need for novel highly productive drought-tolerant cultivars. The aim of the present study was to establish the genetic variability of 14 cowpea populations (60 indigenous genotypes from 13 microregions of Rio Grande do Norte and 4 domesticated cultivars produced by Embrapa) using inter-simple sequence repeats (ISSR) markers. The set of 13 selected primers generated a total of 257 loci, 247 (96.11%) of which were polymorphic, with sizes ranging between 200 and 2000 bp. Genetic similarities between accessions were estimated from Jaccard coefficients and genetic relationships were determined from the dendrogram constructed using the unweighted pair group method with arithmetic average (UPGMA) technique. Bayesian statistics coupled with the Markov chain Monte Carlo technique was applied to determine population structure, while the genetic variability was established by analysis of molecular variance. UPGMA analysis allowed the separation of the genotypes into three groups, but no relationship between the genetic and geographical distances was observed. The fixation index was considered intermediary (FST = 0.0818), the average heterozygosity was low (HS = 0.39) and the coefficient of endogamy was high (f = 92.6%). The results show the presence of genetic diversity among the studied populations and revealed that such variability could be attributed mainly to intra-population variability (91.82%). MenosCowpea [Vigna unguiculata (L.) Walp.] is cultivated widely by small farmers in the semiarid region of Northeastern Brazil for subsistence purposes, especially to complement the family income. However, owing to the limited availability of water in this region, there is an urgent need for novel highly productive drought-tolerant cultivars. The aim of the present study was to establish the genetic variability of 14 cowpea populations (60 indigenous genotypes from 13 microregions of Rio Grande do Norte and 4 domesticated cultivars produced by Embrapa) using inter-simple sequence repeats (ISSR) markers. The set of 13 selected primers generated a total of 257 loci, 247 (96.11%) of which were polymorphic, with sizes ranging between 200 and 2000 bp. Genetic similarities between accessions were estimated from Jaccard coefficients and genetic relationships were determined from the dendrogram constructed using the unweighted pair group method with arithmetic average (UPGMA) technique. Bayesian statistics coupled with the Markov chain Monte Carlo technique was applied to determine population structure, while the genetic variability was established by analysis of molecular variance. UPGMA analysis allowed the separation of the genotypes into three groups, but no relationship between the genetic and geographical distances was observed. The fixation index was considered intermediary (FST = 0.0818), the average heterozygosity was low (HS = 0.39) and the coefficient of endogamy was high (f =... Mostrar Tudo |
Palavras-Chave: |
Diversidade genética; Drought stress; Estresse hídrico; Genetic diversity; Melhoramento de planta; Plant improvement. |
Thesagro: |
Feijão de corda; Vigna Unguiculata. |
Categoria do assunto: |
G Melhoramento Genético |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/134270/1/ArtigoSarmanhoAfricanJournalBiotechnology.pdf
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Marc: |
LEADER 02529naa a2200265 a 4500 001 2030738 005 2022-05-26 008 2015 bl uuuu u00u1 u #d 024 7 $a10.5897/AJB2015.14671$2DOI 100 1 $aMENDES, R. F. M. 245 $aGenetic variability of indigenous cowpea genotypes as determined using inter-simple sequence repeats markers. 260 $c2015 520 $aCowpea [Vigna unguiculata (L.) Walp.] is cultivated widely by small farmers in the semiarid region of Northeastern Brazil for subsistence purposes, especially to complement the family income. However, owing to the limited availability of water in this region, there is an urgent need for novel highly productive drought-tolerant cultivars. The aim of the present study was to establish the genetic variability of 14 cowpea populations (60 indigenous genotypes from 13 microregions of Rio Grande do Norte and 4 domesticated cultivars produced by Embrapa) using inter-simple sequence repeats (ISSR) markers. The set of 13 selected primers generated a total of 257 loci, 247 (96.11%) of which were polymorphic, with sizes ranging between 200 and 2000 bp. Genetic similarities between accessions were estimated from Jaccard coefficients and genetic relationships were determined from the dendrogram constructed using the unweighted pair group method with arithmetic average (UPGMA) technique. Bayesian statistics coupled with the Markov chain Monte Carlo technique was applied to determine population structure, while the genetic variability was established by analysis of molecular variance. UPGMA analysis allowed the separation of the genotypes into three groups, but no relationship between the genetic and geographical distances was observed. The fixation index was considered intermediary (FST = 0.0818), the average heterozygosity was low (HS = 0.39) and the coefficient of endogamy was high (f = 92.6%). The results show the presence of genetic diversity among the studied populations and revealed that such variability could be attributed mainly to intra-population variability (91.82%). 650 $aFeijão de corda 650 $aVigna Unguiculata 653 $aDiversidade genética 653 $aDrought stress 653 $aEstresse hídrico 653 $aGenetic diversity 653 $aMelhoramento de planta 653 $aPlant improvement 700 1 $aBRITTO, F. B. 700 1 $aFREIRE FILHO, F. R. 700 1 $aLIMA, P. S. da C. 773 $tAfrican Journal of Biotechnology, Nairobi$gv. 14, n. 36, p. 2652-2661, Sep. 2015.
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Registro original: |
Embrapa Amazônia Oriental (CPATU) |
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Registro Completo
Biblioteca(s): |
Embrapa Pantanal. |
Data corrente: |
26/09/2018 |
Data da última atualização: |
03/12/2018 |
Tipo da produção científica: |
Artigo de Divulgação na Mídia |
Autoria: |
SILVA, J. C. B.; ABREU, U. G. P. de. |
Afiliação: |
JULIANA CORREA BORGES SILVA, CPAP; URBANO GOMES PINTO DE ABREU, CPAP. |
Título: |
Por que investir em touros avaliados geneticamente e qual a importância do manejo reprodutivo? |
Ano de publicação: |
2018 |
Fonte/Imprenta: |
Revista Katayama, ano 10, n. 8, p. 32-37, 2018. |
Idioma: |
Português |
Conteúdo: |
A escolha dos reprodutores é fundamental para a atividade pecuária, pois é a partir do que é reproduzido que estabeleceremos um processo de melhoramento genético animal, em harmonia com o sistema de produção, seja ele qual for. Assim, colocar na ponta do lápis o incremento de produção com a utilização de touros melhoradores em função da relação touro:vaca e da fertilidade do rebanho, é o que justifica o investimento. Desse modo, aumentar a taxa de natalidade, juntamente com a qualidade desses animais nascidos, é o objetivo de todo pecuarista. |
Thesagro: |
Melhoramento Genético Animal; Pecuária. |
Thesaurus NAL: |
Animal breeding; Livestock. |
Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/187585/1/ADM-Urbano-2018.pdf
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Marc: |
LEADER 01100nam a2200169 a 4500 001 2096340 005 2018-12-03 008 2018 bl uuuu u00u1 u #d 100 1 $aSILVA, J. C. B. 245 $aPor que investir em touros avaliados geneticamente e qual a importância do manejo reprodutivo?$h[electronic resource] 260 $aRevista Katayama, ano 10, n. 8, p. 32-37$c2018 520 $aA escolha dos reprodutores é fundamental para a atividade pecuária, pois é a partir do que é reproduzido que estabeleceremos um processo de melhoramento genético animal, em harmonia com o sistema de produção, seja ele qual for. Assim, colocar na ponta do lápis o incremento de produção com a utilização de touros melhoradores em função da relação touro:vaca e da fertilidade do rebanho, é o que justifica o investimento. Desse modo, aumentar a taxa de natalidade, juntamente com a qualidade desses animais nascidos, é o objetivo de todo pecuarista. 650 $aAnimal breeding 650 $aLivestock 650 $aMelhoramento Genético Animal 650 $aPecuária 700 1 $aABREU, U. G. P. de
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