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Data/hora: 11/06/2024 04:00:38

Genetic diversity assessed by microsatellite markers in sweet corn cultivars
Provedor de dados: Scientia Agricola
Autores: Lopes,Ana Daniela; Scapim,Carlos Alberto; Machado,Maria de Fátima Pires da Silva; Mangolin,Claudete Aparecida; Silva,Tereza Aparecida; Cantagali,Liriana Belizário; Teixeira,Flávia França; Mora,Freddy.
Information on genetic diversity is essential to the characterization and utilization of germplasm. The genetic diversity of twenty-two sweet corn cultivars (seventeen open-pollinated varieties, OPV, and five hybrids, H) was investigated by applying simple sequence repeat markers. A total of 257 primers were tested, of which 160 were found to be usable in terms of high reproducibility for all the samples tested; 45 were polymorphic loci, of which 30 were used to assess the genetic diversity of sweet corn cultivars. We detected a total of 86 alleles using 30 microsatellite primers. The mean polymorphism was 82 %. The highest heterozygosity values (Ho = 0.20) were found in the PR030-Doce Flor da Serra and BR427 III OPVs, whereas the lowest values (0.14) were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Simple sequence repeats; Neighbor-joining; Maize germplasm.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162015000600513

Bayesian analysis of the genetic structure of a Brazilian popcorn germplasm using data from simple sequence repeats (SSR)
Provedor de dados: Chilean Journal of Agricultural Research
Autores: 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