Estimating gene action and combining ability for yield and fiber quality in cotton (Gossypium hirsutum L.)

Genetic evaluation of segregating populations is one the primary activities cotton breeders. Seven genotypes were crossed in a line ? tester mating design. The population 12 F1, F2 and their parents tested Randomized Complete Block Design with three replications at Nazilli Cotton Research Institute T?rkiye during 2014/2015 cotton-growing season. genetic variability was significant for all characters studied. ?2GCA/?2SCA indicated non-additive gene action controlling seed yield (F2), ginning out-turn (F1) fiber quality traits both generations. highly favourable GCA effects strength recorded Carmen cultivar. Carisma hybrid exhibited high mean performance SCA strength, while Gloria ST-468 superior terms out-turn. We concluded that individual plants desired should be selected later generations due to preponderance actions.