Estimation of heterosis and combining ability under low soil phosphorus condition in rice (Oryza sativa L.).

ABSTRACT: Exploiting yield heterosis under low soil phosphorus (P) inputs is a possible strategy for enhancing rice productivity and resource use efficiency in the changing climate scenario. In the present study, Line (L) × Tester (T) analysis was conducted with five restorers, three maintainer lines and 15 derived hybrids. The hybrids and parents were evaluated for two wet seasons (Kharif- 2017 and 2019) across the graded levels of applied P (low-P20 kg ha^-1; Moderate-P40 kg ha^-1; Normal-P60 kgha^-1). Pooled analysis across years revealed highly significant variances in the interaction of the General Combining Ability (GCA) of parents and the Specific Combining Ability (SCA) of hybrids with a predominance of non-additive genetic variance. Testers contributed higher v

SUBMITTER: Madhusudan N 

PROVIDER: S-EPMC12541075 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature