Diploidization in a wild rice allopolyploid is both episodic and gradual

作者：Xin Wang, Ning Li, Qian Wang, Tianyu Lei, Ju-Min Zhou, Fu-min Zhang, Xue‐Zhu Liao, Cheng-Gen Qiang, Wen-Hao Yu, Jing-Dan Han, Yang Ye, Chun-Yan Jing, Meixia Wang, Qiang Gao, Jinfeng Chen, Yuannian Jiao, Zhiqiang Wu, Ya-long Guo, R. Wing, Jeff J. Doyle, Song Ge, Xin-Hui Zou · 发表于：Proceedings of the National Academy of Sciences of the United States of America · 年份：2025 · DOI：10.1073/pnas.2424854122 · 被引用次数：7 · 研究领域：Medicine

Significance Diploidization plays a crucial role in overcoming the initial challenges following polyploidy and generating novel variation, thereby contributing to the evolutionary success of angiosperms. However, the search for general “rules” regarding the tempo and mode of diploidization has been difficult. We demonstrate that a population genomic approach which accounts for variation in parental diploid species is critical for understanding polyploid evolution, not only for discrimination of sources of evolutionary variation but also for ascertaining the tempo of change. Our analyses document how the tempo of diploidization in a single species can be both episodic and gradual, depending on the mutation types, which captures the nature of the independence of the heterogeneous genomic processes lumped under “diploidization.”