Nature and magnitude of heterosis for yield and related traits in rice (Oryza sativa L.)Pantnagar Journal of Research, Volume - 18, Issue - 1 ( January-April, 2020)
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Heterosis was studied for 12 characters in 60 crosses developed by crossing 20 lines and tree testers (2 CMS & 1 TGMS) a line x tester mating design. Promising hybrids expressed highest SCA effects for grain yield were obtained with general combiners involved into different parental combinations of UPR 3403-4-1-1 x UPRI 95-167 (L1 x T1), UPRI 2008-62 x UPRI 95-17A (L20 x T2) and UPR 3428-4-1-1 x UPRI 95-17A(L11 x T2). The per cent estimate for standard heterosis for grain yield was recorded highest for UPRI 2008-39 x PUSA6A(L19 x T3) followed by UPR 3403-4-1-1 x UPRI 95-17A(L1 x T1) and UPRI 2008-62 x PUSA6A (L20 x T3). These identified hybrids have potential and can be channelized in rice hybrid development programme after further testing in station/multiplications trials.
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