Heterosis for seed cotton yield and its quantitative characters of Gossypium barbadense L.

摘要

A diallel crossing programme was takenup with six different Gossypium barbadense genotypes to estimate the extent of heterosis for yield and other quantitative traits in some crosses of G. barbadense. A total of 15 hybrids which were developed by using six parents during winter 2008 and raised during winter 2009 along with their parents and Suvin (check). Among the hybrids, the maximum heterosis for seed cotton yield was observed in hybrid TCB 47 x CCB 6 (184.34 %) followed by TCB 47 x CCB 5 (145.60%) and CCB 5 x CCB 6 (106.48 %). These hybrids also showed significant heterosis for sympodia and bolls/plant, boll weight, lint index, seed index and ginning outturn. From this study, it was concluded that the hybrids TCB 45 x CCB 7, TCB 45 x CCB 5, TCB45 x CCB 2 and CCB 7 X CCB 2 exhibited significant positive heterosis over mid parent, better parent and standard check for seed cotton yield/plant. So these hybrids may be utilized for commercial exploitation after testing their stability.