Artículos de revistas
Epistatic effects on grain yield of soybean [Glycine max (L.) Merrill]
Efeitos epistáticos para produção de grãos em soja [Glycine max (L.) Merrill]
Fecha
2012Registro en:
Crop Breed. Appl. Biotechnol.,v.12,n.4,p.231-236,2012
1984-7033
10.1590/S1984-70332012000400001
Autor
Barona, Marco Antonio Acevedo
Colombari Filho, José Manoel
Santos, Vanderlei da Silva
Geraldi, Isaias Olívio
Institución
Resumen
Studies addressing the estimation of genetic parameters in soybean have not emphasized the epistatic effects. The purpose of this study was to estimate the significance of these effects on soybean grain yield, based on the Modified Triple Test Cross design. Thirty-two inbred lines derived from a cross between two contrasting lines were used, which were crossed with two testers (L1 and L2). The experiments were carried out at two locations, in 10 x 10 triple lattice designs with 9 replications, containing 32 lines (Pi ), 64 crosses (32 Pi x L1 and 32 Pi x L2 ) and controls. The variation between ( ͞L1i + ͞L2i - ͞Pi ) revealed the presence of epistasis, as well as an interaction of epistasis x environment. Since the predominant component of epistasis in autogamous species is additive x additive (i type), we suggest postponing the selection for grain yield to later generations of inbreeding in order to exploit the beneficial effects of additive x additive epistasis.