Epistasis in intra- and inter-gene pool crosses of the common bean.

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dc.contributorJ. C. BOREL, UNIVERSIDADE FEDERAL DO VALE DO SÃO FRANCISCO, Petrolina-PE; MAGNO ANTONIO PATTO RAMALHO, UFLA; ANGELA DE FATIMA BARBOSA ABREU, CNPAF.
dc.creatorBOREL, J. C.
dc.creatorRAMALHO, M. A. P.
dc.creatorABREU, A. F. B.
dc.date2018-01-18T22:18:04Z
dc.date2018-01-18T22:18:04Z
dc.date2018-01-18
dc.date2016
dc.date2018-01-18T22:18:04Z
dc.date.accessioned2026-07-01T00:04:06Z
dc.descriptionEpistasis has been shown to have an important role in the genetic control of several quantitative traits in the common bean. This study aimed to investigate the occurrence of epistasis in intra-and inter-pool gene crosses of the common bean. Four elite lines adapted to Brazilian conditions were used as parents, two from the Andean gene pool (ESAL 686; BRS Radiante) and two from the Mesoamerican gene pool (BRSMG Majestoso; BRS Valente). Four F-2 populations were obtained: "A" (ESAL 686 x BRS Radiante), "B" (BRSMG Majestoso x BRS Valente), "C" (BRS Radiante x BRSMG Majestoso), and "D" (BRS Valente x ESAL 686). A random sample of F2 plants from each population was backcrossed to parents and F-1 individuals, according to the triple test cross. Three types of progenies from each population were evaluated in contiguous trials. Seed yield and 100-seed weight were evaluated. Dominance genetic variance was predominant in most cases. However, the estimates of genetic variance may be biased by the occurrence of linkage disequilibrium and epistasis. Epistasis was detected for both traits; however, the occurrence differed among the populations and between the two traits. The results of this study reinforce the hypothesis that epistasis is present in the genetic control of traits in the common bean and suggest that the phenomenon is more frequent in inter-gene pool crosses than in intra-gene pool crosses.
dc.identifierGenetics and Molecular Research, v. 15, n. 1, gmr15017573, Feb. 2016.
dc.identifier1676-5680
dc.identifierhttp://www.alice.cnptia.embrapa.br/alice/handle/doc/1085752
dc.identifier10.4238/gmr.15017573
dc.identifier.urihttp://hdl.handle.net/123456789/396657
dc.languageeng
dc.rightsopenAccess
dc.subjectTriple test cross
dc.subjectFeijão
dc.subjectPhaseolus vulgaris
dc.subjectMelhoramento genético vegetal
dc.subjectBeans
dc.subjectOutbreeding depression
dc.subjectPlant breeding
dc.titleEpistasis in intra- and inter-gene pool crosses of the common bean.
dc.typeArtigo de periódico

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