12Regional Agricultural Research Station, Nandyal-581 503
1Part of a Ph.D. thesis submitted by the senior author to A.P. Agril. University, Hyderabad.
An analysis of 32 hybrids involving four varieties of G. hirsutum and eight varieties of G. barbadense as testers in a line × tester mating design revealed that among female parents, American nectariless and K 3400 and among the male parents, SB 289E and SB 1085-6, were the best general combiners for seed cotton yield. American nectariless is an American upland variety and K 3400 is a Russian type. Both the male parents are of Russian origin and are short branch types. The hybrid, Gujarat 67×Suvin, showed the highest and positive specific combining ability effect.
