Produção Nacional
Revisado por pares
Potential of maize single-cross hybrids for extraction of inbred lines using the mean components and mixed models with microsatellite marker information
2008; Research Foundation of Ribeirão Preto; Volume: 7; Issue: 4 Linguagem: Inglês
10.4238/vol7-4gmr491
ISSN1676-5680
AutoresMárcio Balestre, Renzo Garcia Von Pinho, José Camisão de Souza, Juarez Campolina Machado,
Tópico(s)Genetic Mapping and Diversity in Plants and Animals
ResumoThe present study examined the importance of mean (m+a' and d) components in the performance of single-cross hybrids for the formation of new populations and determined the contribution of the mixed model (best linear unbiased predictor of random effects, BLUP) method associated with molecular markers for the choice of crosses to obtain interpopulation hybrids.Ten single-cross commercial hybrids of different companies were used for this purpose, producing all possible doublecross hybrids through a complete diallel.The hybrids were evaluated in 15 locations in the agricultural year 2005/2006, using randomized complete block design with three repetitions.In three of these locations, estimates of m+a' and d were obtained.DNA was extracted from the single-cross hybrids and 20 SSR primers were used, nine of which were linked to QTL for yield.There was no correlation between m+a' of the single-cross hybrids with general combining ability (r = -0.15)inferring that populations with lines with high means do not always produce good hybrids.Also, it was observed that the correlation between the genetic distances with specific combining ability varied from 0.31 to 0.80 in the inter-group hybrids, while in the intra-group hybrids these estimates were low and non-significant.The heritability value obtained by BLUP ©FUNPEC-RP www.funpecrp.com.br
Referência(s)