QTL mapping for the cooking time of common beans
Carregando...
Data
2012
Título da Revista
ISSN da Revista
Título de Volume
Editor
Resumo
The decrease in the per capita consumption
of beans has been partially attributed to their lengthy
cooking time and the aggregated capital costs of their
preparation. The aim of this study was to map
microsatellite (SSR) markers linked to quantitative
trait loci (QTLs) that govern the cooking time of
common beans. An F2 generation consisting of 140
families was generated from a cross between lines
CNFM7875 and Laranja. The cooking time of the F2:4
and F2:5 generations was then evaluated, and the latter
generation was tested in two environments. The
analysis of variance found a significant effect for the
interactions between the families (P\0.01) in both
the F2:4 and F2:5 generations, as well as for the group analyses performed in the two environments. The
experimental coefficient of variation varied from 9.42
to 17.94%. The Pearson’s correlation test indicated no
significant association between water absorption and
cooking time. The heritability coefficients had values
of 0.532 and 0.739 for the F2:5 families evaluated at the
two different locations, and the group analysis of the
F2:5 generation indicated that there was a significant
genotype 9 environment interaction. Of the 105 polymorphic
SSRs evaluated, 91 mapped to 12 linkage
groups with an estimated map size of 1,303.7 cM. Six
significant QTLs were detected in both environments,
and the percentage of the phenotypic variation that was
explained by these loci ranged from 11.54 to 21.63%.
As the genetic control was oligogenic, the identification
of QTLs should serve as an optimal starting point
for the implementation of a selection program.
Descrição
Palavras-chave
Phaseolus vulgaris, SSR markers, Grain quality, QTL, Linkage map
Citação
GARCIA, Robertha Augusta Vasconcelos et al. QTL mapping for the cooking time of common beans. Euphytica, Wageningen, v. 186, n. 3, p. 1-14, 2012.