2013•BIOINFOLET - A Quarterly Journal of Life SciencesRequires access
Heterosis for yield and yield traits in hybrid rice (Oryza sativa L.) underaerobic condition
B. A. Veeresha, N. G. Hanamaratti, P. M. Salimath, Mahadev B. Chetti
Open publisher page 2 citations
Abstract
The performance of the 44 hybrids developed by Line x Tester cr ossing was estimated for heterosis, over KRH-2 in respect of seed yiel d and its contributing characters. The analysis of variance indicated hig hly significant differences among genotypes and hybrids for all the characters. The hybrid IR68897A x KMR 3 showed standard heterosis and heterobeltiosis fo r panicles per plant, panicle weight, 1000 seed weight and grain yield. Relati ve heterosis for grain yield per plant ranged between -57.26 to 421.22 coupled w ith significant heterobeltiosis from -59.89 to 364.41. The standard heterosis r anged 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-BB-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 p er panicle and grain yield.