Hierarchical additive effects on heterosis in rice (Oryza sativa L.).

ABSTRACT: Exploitation of heterosis in crops has contributed greatly to improvement in global food and energy production. In spite of the pervasive importance of heterosis, a complete understanding of its mechanisms has remained elusive. In this study, a small test-crossed rice population was constructed to investigate the formation mechanism of heterosis for 13 traits. The results of the relative mid-parent heterosis and modes of inheritance of all investigated traits demonstrated that additive effects were the foundation of heterosis for complex traits in a hierarchical structure, and multiplicative interactions among the component traits were the framework of heterosis in complex traits. Furthermore, new balances between unit traits and related component traits provided hybrids with the opportuni

SUBMITTER: Dan Z 

PROVIDER: S-EPMC4566041 | biostudies-literature | 2015

REPOSITORIES: biostudies-literature