The present Line x tester analysis was attempted to obtain information on the magnitude of gca and sca variances and gca and sca effects for individual parents and crosses in respect of eight traits through combining ability analysisMaterial for this investigation comprised of forty American cotton hybrids developed on four female parents (testers) using ten male parents (lines) in line x testers mating design and one standard check (HHH 223).The experimental material was grown at CCS Haryana Agricultural University, Cotton Research Station Sirsa, during Kharif
2014-2015 in a randomized block design with three replications. Observations were recorded for eight characters namely, plant height, number of monopods, number of bolls, boll weight, ginning outturn, seed index, lint index and seed cotton yield/plant. Combining ability analysis revealed that additive variance was more than non-additive variance in the expression of all the traits. For seed cotton yield high sca effects shown crosses H1098 Ã— RED 5-7, H1300 Ã— RED 5-7, H1300 Ã— PUSA-180, H1226 Ã— FM 531B LINE-7 and H1300 Ã— HS-60 were cross combinations of poor combining parents. The study of gca effects revealed that male parents HS-180 and PUSA-1803 were best general combiner for seed cotton yield, number of bolls, ginning out turn, seed index, lint index and number of monopods. The respective best combiners for various traits could be used for improvement in that trait. However, considering the economic important of various characters HS-180, GS-10, PUSA-1803 and RED 5-7 among the male and H1117 among female may be used for future breeding programme.
Ankit Kumar, KS Nirania, Chhavikant and AH Bankar. Combining ability for seed cotton yield and attributing traits in American cotton (Gossypium hirsutum L.). J Pharmacogn Phytochem 2017;6(6):376-378.