Heterosis for seed cotton yield and attributing traits in American cotton (Gossypium hirsutum L.)

摘要

The present study was undertaken to estimate economic heterosis with the objective of exploring possibilities of commercial utilization of newly developed hybrids. Material for this investigation comprised of forty American cotton hybrids developed onfour 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 kharif2014-2015 in a randomized block design with three replications. Observations were recorded for eight characters namely, plant height, monopods, bolls, boll weight, ginning outturn, seed index, lint index and seed cotton yield/plant. The economic heterosis was calculated over standard check HHH 223. Considerable amount of heterosis were recorded for seed cotton yield and other related characters under study. The hybrids HI 117 * GS-10, HI 117 x HS180, HI 117 x PUSA1803, H1098 * HS180 , H1098 x RED 5-7, HI 117 xTamcot SP23 and H1098 x GS10 exhibited heterosis of more than 70 per cent and hence warrant their further testing over locations for commercial utilization.