Zea mays L.
Half-sib reciprocal recurrent selection
Full-sib reciprocal recurrent selection
Springer Online Journal Archives 1860-2000
Summary The nature and magnitude of variability in the interpopulation cross of ‘Mezcla Amarillo Selection’ (MAS), an introduction from CIMMYT, Mexico, and ‘J607’, a population developed in India using indigenous, American, and Yugoslavian germplasm, were studied. Interpopulation progenies developed by following the North Carolina Design I were evaluated at two locations. The additive genetic variance component in interpopulation cross,σ A(12) 2 , and in one population assuming the other population as tester,σ A12 2 andσ A21 2 were significant for all the traits evaluated, namely ear length, ear girth, kernel rows and days to silk, with one exception. For kernel rows, the dominance variance component,σ A(12) 2 , was also significant but it was smaller thanσ A(12) 2 . The variance component due to dominance X location interaction,σ DL(12) 2 , was significant for all traits except kernel rows. In the case of ear length and ear girth,σ DL(12) 2 was greater than the other components.σ AL(12) 2 ,σ AL12 2 andσ AL21 2 were not significant for any trait. Expected genetic advance indicated a superiority of half-sib reciprocal recurrent selection over full-sib reciprocal recurrent selection.
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