Additive and partially dominant effects from genomic variation contribute to rice heterosis
Authors: Dan, Z., Chen, Y., Zhou, W., Xu, Y., Huang, J., Chen, Y., Meng, J., Yao, G., Huang, W.
Category: Plant Biology
Model Organism: Oryza sativa
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The study systematically identified heterosis-associated genes and metabolites in rice, functionally validated three genes influencing seedling length, and integrated these molecules into network modules to explain heterosis variance. Predominant additive and partially dominant inheritance patterns were linked to parental genomic variants and were shown to affect 17 agronomic traits in rice, as well as yield heterosis in maize and biomass heterosis in Arabidopsis. The work highlights the quantitative contribution of transcriptomic and metabolomic variation, especially in phenylpropanoid biosynthesis, to hybrid vigor.