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dc.contributor.authorMENDES, R. F. M.pt_BR
dc.contributor.authorBRITTO, F. B.pt_BR
dc.contributor.authorFREIRE FILHO, F. R.pt_BR
dc.contributor.authorLIMA, P. S. da C.pt_BR
dc.date.accessioned2015-11-30T11:11:11Zpt_BR
dc.date.available2015-11-30T11:11:11Zpt_BR
dc.date.created2015-11-30pt_BR
dc.date.issued2015pt_BR
dc.identifier.citationAfrican Journal of Biotechnology, Nairobi, v. 14, n. 36, p. 2652-2661, Sep. 2015.pt_BR
dc.identifier.issn1684-5315pt_BR
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/1029936pt_BR
dc.descriptionCowpea [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%).pt_BR
dc.language.isoengeng
dc.rightsopenAccesseng
dc.subjectDiversidade genéticapt_BR
dc.subjectMelhoramento de plantapt_BR
dc.subjectEstresse hídricopt_BR
dc.subjectDrought stresspt_BR
dc.subjectGenetic diversitypt_BR
dc.subjectPlant improvementpt_BR
dc.titleGenetic variability of indigenous cowpea genotypes as determined using inter-simple sequence repeats markers.pt_BR
dc.typeArtigo de periódicopt_BR
dc.date.updated2016-02-25T11:11:11Zpt_BR
dc.subject.thesagroFeijão de cordapt_BR
dc.subject.thesagroVigna Unguiculatapt_BR
riaa.ainfo.id1029936pt_BR
riaa.ainfo.lastupdate2016-02-25pt_BR
dc.identifier.doi10.5897/AJB2015.14671pt_BR
dc.contributor.institutionR. 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.pt_BR
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