PJB-1995-14
COMBINING ABILITY ESTIMATES FOR EARLY MATURITY AND AGRONOMIC TRAITS IN PEANUT (ARACHIS HYPOGAEA L.)
NAAZAR ALl, J.C. WYNNE AND J.P. MURPHY*
Abstract
To develop early maturing and large seeded cultivars of peanut (Arachis hypogaea L) virginia type alltivars (No. 334, Banki and NC-9) were crossed with four early spanish type lines (ICGSE-4, ICGSE-130, ICGSE-147 and 'Chico') in a factorial mating design. Fl and F2 generations were evaluated in the field to clctermine the combining ability of the parents for maturity and other agronomic traits. General combining ability (GCA) estimates were highly significant for all traits except maturity index in the F1 Specific combinina ability (SCA) estimates were nonsignificant for all traits except 100 seed weight in the F2 generation. The magnitude of GCA was much greater than SCA for all the traits in both generations indicating that additive genetic variance was more important than nonadditive genetic variance. Among male parents, ICGSE130 gave highest GCA for yield per plant, maturity, and 100 seed weight, whereas ICGSE-147 gave highest GCA for 20 pod length and seed number per 50 pods. Among adapted female parents, NC 9 gave the best GCA for yield per plant, 20 pod length, seed weight, and shelling percentage.
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