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1999•BIOINFOLET - A Quarterly Journal of Life SciencesRequires access

Heterosis for yield and yield components in rice (Oryza sativa L.)

S. K. Singh, Vikash Sahu, Amita Sharma, Pradeep Kumar Bhati

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Abstract

Heterobeltiosis for grain yield ranged from - 41.07 to 38.20%, standard heterosis 1 (SH1) from -52.61 to 10.03% and standard heterosis (SH2) from 26.20 to 71.38%. The higher heterotic effect among yield components was observed for number of effective tillers/plant, followed by number of grains/panicle and panicle length. Top two high yielding crosses were IR68897A XCR2496 and Pusa6A X CR2496. These two crosses showed negative standard heterosis for days to maturity.

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Heterobeltiosis for grain yield ranged from - 41.07 to 38.20%, standard heterosis 1 (SH1) from -52.61 to 10.03% and standard heterosis (SH2) from 26.20 to 71.38%. The higher heterotic effect among yield components was observed for number of effective tillers/plant, followed by number of grains/panicle and panicle length. Top two high yielding crosses were IR68897A XCR2496 and Pusa6A X CR2496. These two crosses showed negative standard heterosis for days to maturity.

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Available abstract

Heterobeltiosis for grain yield ranged from - 41.07 to 38.20%, standard heterosis 1 (SH1) from -52.61 to 10.03% and standard heterosis (SH2) from 26.20 to 71.38%. The higher heterotic effect among yield components was observed for number of effective tillers/plant, followed by number of grains/panicle and panicle length. Top two high yielding crosses were IR68897A XCR2496 and Pusa6A X CR2496. These two crosses showed negative standard heterosis for days to maturity.

Key concepts: Heterosis, Panicle, Oryza sativa, Yield (engineering), Grain yield, Agronomy, Biology, Hybrid

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