Performance of IRRI [International Rice Research Inst., Los Banos, Laguna (Philippines)] rice hybrids at Rice Research Institute (IRRI), Kala Shah Kaku, Lahore, Pakistan
1993
Ali, S.S. | Jafri, J.H. | Anwar Butt, M. (Rice Research Inst., Kala Shah Kaku, Lahore (Pakistan))
Panicles/sq m ranged from 195 to 400, plant height from 77 to 103 cm, and panicle length from 23.7 to 30.3 cm. Spikelets/panicle ranged from 115 to 234 and 100-seed weight from 1.87 to 2.76 g. Maximum spikelet sterility was observed in IR62829 A/ IR35366-62-1-2-2-3R. Only hybrids IR58025 A/ IR40750-82-2-2-3R and IR58025 A/IR10198-66-2R significantly outperformed all other hybrids and checks. The IR58025 A combinations, however, significantly outperformed IR62829 A hybrids and checks for most traits. Of the 21 IRRI hybrids, eight performed significantly better than high-yielding check IR6 and three performed significantly better than KS282. IR6 had more panicles/sq m and heavier 100-seed weight and other hybrid combinations. IR58025 A/ Pusa 150-9-3-1R matured in 93d, IR62829 A/IR40750-82-2-2-3R in 111d, and IR58025 A/ IR40750-82-2-2-3R in 119d. These hybrid combinations showed 47.1, 47.9, and 74.8% more standard heterosis over KS282, and 28.8, 29.5, and 53.1% over IR6, respectively. Cross IR62829 A/IR40750-2-2-3R showed 3.8, 8.4, and 61.2% more standard heterosis over KS282 for panicles /sq m, panicle length, and spikelets/panicle, respectively. Severe attacks of leaffolder and whitebacked planthopper, partial spikelet sterility (50-75% fertile spikelets for most genotypes), complete panicle exsertion, late transplanting of seedlings, and water stress at flowering caused low yields of hybrids and checks
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