State Key Laboratory of Biocontrol, Guangdong Provincial Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University, Guangzhou, 510275, China.
Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, School of Life Sciences, Fudan University, Shanghai, 200438, China.
Nat Commun. 2024 Feb 21;15(1):1182. doi: 10.1038/s41467-024-45447-0.
High reproductive compatibility between crops and their wild relatives can provide benefits for crop breeding but also poses risks for agricultural weed evolution. Weedy rice is a feral relative of rice that infests paddies and causes severe crop losses worldwide. In regions of tropical Asia where the wild progenitor of rice occurs, weedy rice could be influenced by hybridization with the wild species. Genomic analysis of this phenomenon has been very limited. Here we use whole genome sequence analyses of 217 wild, weedy and cultivated rice samples to show that wild rice hybridization has contributed substantially to the evolution of Southeast Asian weedy rice, with some strains acquiring weed-adaptive traits through introgression from the wild progenitor. Our study highlights how adaptive introgression from wild species can contribute to agricultural weed evolution, and it provides a case study of parallel evolution of weediness in independently-evolved strains of a weedy crop relative.
作物与其野生亲缘之间的高繁殖兼容性可为作物育种带来益处，但也为农业杂草进化带来风险。杂草稻是水稻的野生亲缘种，它侵害稻田并在全球范围内造成严重的作物损失。在亚洲热带地区，水稻的野生祖先存在的地方，杂草稻可能会受到与野生种杂交的影响。对这种现象的基因组分析非常有限。在这里，我们使用 217 个野生、杂草和栽培稻样本的全基因组序列分析表明，野生稻杂交对东南亚杂草稻的进化做出了重大贡献，一些品系通过从野生祖先的渐渗获得了杂草适应性特征。我们的研究强调了野生种的适应性渐渗如何促进农业杂草的进化，并为杂草作物相对独立进化的品系中杂草性的平行进化提供了一个案例研究。
