National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
Line × tester analysis was undertaken to assess the magnitude of heterosis in 32 interspecific heterotic group hybrids (G. hirsutum x G. barbadense) of cotton for seed cotton yield and its components developed by crossing eight elite hirsutum lines with four elite barbadense testers during Kharif 2010-11 at Main Agricultural Research Station, Dharwad. The Line × tester analysis consisting 32 interspecific heterotic group hybrids along with checks (RAHB 87 and DCH 32). The results revealed that the variances among genotypes for all the characters were significant. The mean sum of squares for parents was significant for all the characters except for seed index. The hirsutum lines viz., RAH-16 and DHMS and barbadense lines viz., RAB-8 and DB 534 recorded highest mean seed cotton yield. Among hirsutum x barbadense crosses viz., the hybrids viz., DHMS × SNICB75-10 (110.2), DH2752 × DB534 (95.8), DHMS × DB534 (94.4), RAH-25-17 × DB534 (90.9) and DH2752 × SNICB75-10 (89.4) exhibited highest significant positive heterosis over commercial check DCH-32. These interspecific crosses have shown desirable heterosis for seed cotton yield along with other yield components which may be tested in large scale trial to confirm the superiority in heterosis. Based on the predicted double cross performance, the cross combination DHMS × SNICB75-10 and DH2752 × DB534 has recorded the highest mean seed cotton yield of 3287 kg per ha and was selected as diverse F1 base populations for initiating next phase of reciprocal selection for combining ability.
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