Magnitude of heterosis and heritability in sunflower over environments
2008
Khan, H. (Agricultural Research Station, Mansehra (Pakistan)) | Hidayat-ur-Rahman (NWFP Agricultural Univ., Peshawar (Pakistan). Dept. of Plant Breeding and Genetics) | Ahmad, H. (Hazara Univ., Mansehra (Pakistan). Dept. of Genetics) | Ali, H. (Karachi Univ. (Pakistan). Dept. of Botany) | Inamullah | Alam, M.
This study was conducted using 5 cytoplasmic male sterile (CMS) lines and 5 restorers of sunflower, in a line x tester fashions at two locations to determine and quantify the magnitude of heterosis and heritability over environments. The traits studied were days to 50% flowering, days to maturity, 1000-seed weight, seeds per head, oil content and seed yield. Heterotic studies revealed that not a single cross combination showed consistent promising results for all traits. Best cross combinations at Peshawar were TS-18 x TR-13 (-3.06) for early flowering, TS-18 x TR-6023 (-37.91) for early maturity, TS-4 x TR-6 (47.56) for 1000-seed weight, TS-11 x TR-5 (80.70) for seeds per head, TS-11 x TR-6023 (98.25) for oil contents and T335 x TR-5 (117.97) for seed yield.
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