Research Article

Genetic potential of common bean progenies selected for crude fiber content obtained through different breeding methods

Published: May 29, 2015
Genet. Mol. Res. 14 (2) : 5763-5774 DOI: https://doi.org/10.4238/2015.May.29.8
Cite this Article:
(2015). Genetic potential of common bean progenies selected for crude fiber content obtained through different breeding methods. Genet. Mol. Res. 14(2): gmr5078. https://doi.org/10.4238/2015.May.29.8
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Abstract

Gastrointestinal health is of great importance due to the increasing consumption of functional foods, especially those concern­ing diets rich in fiber content. The common bean has been valorized as a nutritious food due to its appreciable fiber content and the fact that it is consumed in many countries. The current study aimed to evalu­ate and compare the genetic potential of common bean progenies of the carioca group, developed through different breeding methods, for crude fiber content. The progenies originated through hybridization of two advanced strains, CNFC 7812 and CNFC 7829, up to the F7 gen­eration using three breeding methods: bulk-population, bulk within F2 families, and single seed descent. Fifteen F8 progenies were evaluated in each method, as well as two check cultivars and both parents, us­ing a 7 x 7 simple lattice design, with experimental plots comprised of two 4-m long rows. Field trials were conducted in eleven environments encompassing four Brazilian states and three different sowing times during 2009 and 2010. Estimates of genetic parameters indicate differ­ences among the breeding methods, which seem to be related to the dif­ferent processes for sampling the advanced progenies inherent to each method, given that the trait in question is not subject to natural selec­tion. Variability amongst progenies occurred within the three breeding methods and there was also a significant effect of environment on the progeny for all methods. Progenies developed by bulk-population at­tained the highest estimates of genetic parameters, had less interaction with the environment, and greater variability.

Gastrointestinal health is of great importance due to the increasing consumption of functional foods, especially those concern­ing diets rich in fiber content. The common bean has been valorized as a nutritious food due to its appreciable fiber content and the fact that it is consumed in many countries. The current study aimed to evalu­ate and compare the genetic potential of common bean progenies of the carioca group, developed through different breeding methods, for crude fiber content. The progenies originated through hybridization of two advanced strains, CNFC 7812 and CNFC 7829, up to the F7 gen­eration using three breeding methods: bulk-population, bulk within F2 families, and single seed descent. Fifteen F8 progenies were evaluated in each method, as well as two check cultivars and both parents, us­ing a 7 x 7 simple lattice design, with experimental plots comprised of two 4-m long rows. Field trials were conducted in eleven environments encompassing four Brazilian states and three different sowing times during 2009 and 2010. Estimates of genetic parameters indicate differ­ences among the breeding methods, which seem to be related to the dif­ferent processes for sampling the advanced progenies inherent to each method, given that the trait in question is not subject to natural selec­tion. Variability amongst progenies occurred within the three breeding methods and there was also a significant effect of environment on the progeny for all methods. Progenies developed by bulk-population at­tained the highest estimates of genetic parameters, had less interaction with the environment, and greater variability.