Nonlinear phenotypic variation uncovers the emergence of heterosis in Arabidopsis thaliana.

ABSTRACT: Heterosis describes the phenotypic superiority of hybrids over their parents in traits related to agronomic performance and fitness. Understanding and predicting nonadditive inheritance such as heterosis is crucial for evolutionary biology as well as for plant and animal breeding. However, the physiological bases of heterosis remain debated. Moreover, empirical data in various species have shown that diverse genetic and molecular mechanisms are likely to explain heterosis, making it difficult to predict its emergence and amplitude from parental genotypes alone. In this study, we examined a model of physiological dominance initially proposed by Sewall Wright to explain the nonadditive inheritance of traits like metabolic fluxes at the cellular level. We evaluated Wright's model for two fitn

SUBMITTER: Vasseur F 

PROVIDER: S-EPMC6481775 | biostudies-literature | 2019 Apr

REPOSITORIES: biostudies-literature