*Department of Crop Physiology, University of Agricultural Sciences, Dharwad-05
Department of Genetics and Plant Breeding, University of Agricultural Sciences, Dharwad-05
Online published on 6 May, 2013.
The performance of the 44 hybrids developed by Line x Tester crossing was estimated for heterosis, over KRH-2 in respect of seed yield and its contributing characters. The analysis of variance indicated highly significant differences among genotypes and hybrids for all the characters. The hybrid IR-68897Ax KMR 3 showed standard heterosis and heterobeltiosis for panicles per plant, panicle weight, 1000 seed weight and grain yield. Relative heterosis for grain yield per plant ranged between -57.26 to 421.22 coupled with significant heterobeltiosis from -59.89 to 364.41. The standard heterosis ranged from 65.52 to 204.52 for grain yield per plant. Based on per se performance and standard heterosis, the hybrids IR-68897A x KMR 3, IR-68897A x IR -60199-B-B-2-1R, IR-68888A x KMR 3 and IR-68897A x IR-65912-90-1-6-3-2-3R were identified as the superior hybrids for panicle length, grains per panicle and grain yield.
Cytoplasmic male sterility, heterosis, hybrid rice, aerobic
