Combining ability study for yield and its component traits through diallele mating design in upland cotton [Gossypium hirsutum L.)

摘要

The analysis of variance for combining ability revealed that, the variance due to SCA variances were higher than GCA variances for all the characters except for days to 50 per cent flowering and 2.5 per cent span length indicating the predominance ofnon additive gene action. The estimates of gca effects revealed that the parents NDLH 1938, RAH 1004 and L 770 were found best general combiners for yield and its component traits in desired direction. The crosses, NDLH 1938 * L 604, L 770* RAH 1004 andSURABHIx HYPS 152 recorded high perse performance (309.2, 276.65 and 257.19 g) and significant positive sea effects (80.99, 72.25 and 51.92) for seed cotton yield/plant, respectively. These hybrids were also recorded high per se performance and significant positive sea effects for bolls/plant, boll weight, lint yield/plant.