Estimation of heterosis for seed cotton yield and biochemical parameters in genetic male sterile based hybrids of Gossypium arboreum L.
The present investigation was undertaken to study heterosis and explore its commercial utilization in desi cotton (G. arboreum L.) by using Line x Tester design with four genetic male sterile females and fifteen male parents. Out of sixty hybrids studied, a total thirty three hybrids showed positive heterobeltiosis and seventeen hybrids showed positive economic heterosis over standard check, AAH 1 and thirty nine crosses showed positive mid parent heterosis for seed cotton yield. The F1 hybrids DGMS 34 x HD 517 (53.19 %), DGMS 34 x HD 523 (40.00 %), DGMS 2 x HD 528 (39.96 %) and DGMS 1 x HD 432 (39.97 %) recorded positive standard heterosis for number of bolls, seed cotton yield and low gossypol content, while the maximum heterobeltiosis for seed cotton yield per plant was exhibited by the hybrid DGMS 2 x HD 528 (121.82 %) followed by DGMS 1 x HD 432 (114.48 %) and DGMS 1 x CNA 398 (84.62 %). Hybrid DGMS 34 x HD 517 had reduced level of gossypol and DGMS 1 x LD 1026 had high level of protein while DGMS 9 x CNA 398 had high level of oil content over standard check AAH 1.
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