Vol. 11, Issue 10 (2022)

Author(s):
Krina N Patel, Pathik B Patel and Himansuman

Abstract:
The present investigation was carried out at Main Rice Research Centre, Navsari Agricultural University, Navsari during kharif-2020-2021. This study comprised three crosses using four diverse lines to study heterosis and inbreeding depression for yield, its components and qualitative traits in rice (Oryza sativa L.) through generation mean analysis (each having P₁, P₂, F₁, F₂, BC₁ and BC₂ generations) in a Compact Family Block Design (CFBD) with three replications. For grain yield per plant (g), best heterotic combination for relative heterosis and heterobeltiosis was recorded for cross III (IR-64 x GR-11) which also recorded significant relative heterosis in desired direction for days to flowering, plant height (cm), productive tillers per plant, grains per panicle, 100-grain weight (g), kernel length (mm), kernel breadth (mm), L:B ratio and amylose content (%) and also showed significant heterobeltiosis in the desired direction for plant height (cm), productive tillers per plant and grains per panicle. Standard heterosis for grain yield per plant (g) in cross I stood significant with its all components except panicle length (cm), 100-grain weight (g) as well as amylose content (%). So, heterosis breeding might be effective for this cross.