Assessment of combining ability, heterosis and heterotic status of grain sorghum (Sorghum bicolor) hybrids
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Authors
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KARTIK SHIVANAND ANGADI
Keladi Shivappa Nayaka University of Agricultural and Horticultural Sciences, Iruvakki, Shivamogga, Karnataka, India
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SOMU G
AICRP on Sorghum (University of Agricultural Sciences, Bengaluru, Karnataka), Chamarajanagar, Karnataka
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VIJAY KUMAR L
University of Agricultural Sciences, Bengaluru, Karnataka 560 065, India
Keywords:
Combining ability, Heterosis, Overall heterotic status, SorghumAbstract
The study was carried out during rainy (kharif) season of 2023 and 2024 at AICRP on Sorghum, Agriculture Research Station, Chamarajanagar, Karnataka to study the magnitude of combining ability and quantify the extent of heterosis among 40 hybrids, which were evaluated in comparison with two checks (CSH-30 and CSH-14) in randomised complete block design (RCBD). The parental materials consisted of four male sterile lines, viz. 279 A, 463 A, 456 A and 415 A and 10 restorer lines namely SOR 3350, SOR 3289, SOR 11938, SOR 11942, SOR 11943, SOR 3182, SOR 6852, SOR 5002, SOR 3570 and SOR 4346. Parents 456 A and SOR 3570 (with GCA status ‘H’) were ascertained as the best general combiners for most of the yield and its component traits. The elite crosses, namely, 456 A × SOR 3570, 463 A × SOR 3570 and 463 A × SOR 4346 were identified with high per se performance, highly significant SCA effects coupled with highly significant standard heterotic effects for grain yield/plant over both the checks and overall heterotic status of these hybrids were of either H × H or H × L/L × H cross combinations.
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