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

Abstract

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 F 7 generation using three breeding methods: bulk-population, bulk within F 2 families, and single seed descent. Fifteen F 8 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 dif-V.A.P. Júnior et al. 5764©FUNPEC-RP www.funpecrp.com.br Genetics and Molecular Research 14 (2): 5763-5774 (2015) ferent 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.

Effectiveness of breeding selection for grain quality in common bean

“…The effects of the environment and of the genotype × environment interaction for CP (Pontes et al, 2015;Silva, Melo, Melo, Bassinello, & Pereira, 2013), CF (Buratto et al, 2009;Dalla Corte et al, 2003), CT (Bertoldo, Coimbra, Barili, Vale, & Rocha, 2009;Perina et al, 2014), the appearance of the grain SCH and SCS (Alvares, Silva, Melo, Melo, & Pereira, 2016;Silva et al, 2014), yield (Pereira et al, 2009;Rocha, Moda-Cirino, Destro, Fonseca Júnior, & Prete, 2010), 100GW (Oliveira, Silva, Santos, Cancellier, & Fidelis, 2014;Pereira et al, 2012Pereira et al, , 2013, and SY (Farinelli & Lemos, 2010) have been extensively detected for genotypes of the carioca group and other groups of grains. The genotype × environment interaction represents a challenge for breeding for grain commercial quality and indicates the difficulty of selecting lines based only on mean values of a single environment.…”

“…Furthermore, it is possible to combine grain nutritional and technological quality with grain yield and commercial quality to meet the requirements of the bean production chain. Through breeding, it is possible to develop high-yielding cultivars with grain of high nutritional value and reduced CT (Buratto & Moda-Cirino, 2017;Pontes, Melo, Pereira, Bassinello, & Melo, 2015).…”

Genetic potential of common bean progenies obtained by different breeding methods evaluated in various environments

“…As a result, sufficient genetic variability must be available to successfully develop higher-yielding cultivars in breeding programs, and efficient strategies should exist to detect differences between elite genotypes, allowing genetic gains. The factors that most affect the efficiency of this process are the existence of genotype-environment (GE) interactions and the choice of an adequate breeding method for segregating populations, following careful identification of the parents (Raposo et al, 2000;Pontes Júnior et al, 2015).…”