Heterosis Studies of Newly developed intra-hirsutum Cotton Hybrids for Seed Cotton and Lint Yield and their Performance for Economic, Morphological and Fibre Quality Traits under Rainfed condition in Cotton (Gossypium hirsutum L.)

Author: K.S. Baig*, V.N. Chinchane, A.R. Gaikwad and U.V. Surewad

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Abstract

Stagnation in yield is observed in cotton since last one decade across all the zones of country mainly because of involvement of parental lines with narrow genetic base. The present study was aimed to develop F1 cotton hybrids by involving parents with wide genetic base for commercial exploitation of useful and standard heterosis for seed cotton yield as estimation of heterosis over mid parent and better parent may not be given desirable cross combinations over commercially cultivated varieties or hybrids. Fifty intra-hirsutum cotton hybrids developed during kharif season of 2017-2018 from Line × Tester mating design (5 lines × 10 testers) were evaluated in randomised block design with two replications at Cotton Research Station, Nanded during kharif season of 2018-2019 along with one local varietal check, NH 615 for estimating useful heterosis and three standard hybrid checks viz., NCS 145, NHH 250 and NHH 44 for estimating standard heterosis for seed cotton yield and lint yield. T

Keywords

Gossypium hirsutum, intra-hirsutum hybrids, useful heterosis, standard heterosis seed cotton yield, mean performance.

Conclusion

Cotton is among those of few often cross pollinated crop which is accessible to development of homozygous genotypes as varieties as well as amenable for commercial exploitation of heterosis by exploitation of additive as well as non-additive genetic variance (Ranganatha et al., 2013). The present study revealed of considerable amount of heterosis for seed cotton yield and lint yield which indicates larger scope for commercial exploitation of heterosis in hybrid breeding of cotton. Based on the above results, the hybrid combinations viz., NHH 1245, NHH 1235, NHH 1204, NHH 1165 and NHH 1075 may be utilized on large scale for commercial exploitation of heterosis in cotton particularly for seed cotton and lint yield. These hybrids may be introduced directly into the market in non Bt version to fulfil the demand of organic cotton cultivators. Simultaneously, parental lines of these hybrids may be converted into BG II version to develop Bt version of these hybrids to meet the needs of non-o

References

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How to cite this article

Baig, K.S.; Chinchane, V. N.; Gaikwad, A. R. and Surewad, U. V. (2022). Heterosis Studies of Newly developed intra-hirsutum Cotton Hybrids for Seed Cotton and Lint Yield and their Performance for Economic, Morphological and Fibre Quality Traits under Rai