Introgression and selection shaping the genome and adaptive loci of weedy rice in northern China

文献类型： 外文期刊

第一作者： Sun, Jian

作者： Sun, Jian;Ma, Dian-Rong;Xu, Zheng-Jin;Liu, Dan;Du, Hong-Bo;Chen, Wen-Fu;Sun, Jian;Ma, Dian-Rong;Xu, Zheng-Jin;Liu, Dan;Du, Hong-Bo;Chen, Wen-Fu;Qian, Qian

作者机构：

关键词： adaptation;domestication;introgression;seed longevity;weedy rice

期刊名称：NEW PHYTOLOGIST （ 影响因子：10.151； 五年影响因子：10.475 ）

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收录情况： SCI

摘要： As a weed of rice paddy fields, weedy rice has spread worldwide. In northern China, the expansion of weedy rice has been rapid over the past two decades. Its evolutionary history and adaptive mechanisms are poorly understood. Evolutionary relationships between northern weedy rice and rice cultivars were analyzed using presumed neutral markers sampled across the rice genome. Genes involved in rice domestication were evaluated for their potential roles in weedy rice adaptation. Seed longevity, a critical trait of weedy rice, was examined in an F2 population derived from a cross between weedy rice and a rice cultivar to evaluate weedy rice adaptation and the potential effect of candidate genes. Weedy rice in northern China was not derived directly fromclosely related wild Oryza species or from the introgression of indica subspecies. Introgression with local cultivars, coupled with selection that maintained weedy identity, shaped the evolution of weedy rice in northern China. Weedy rice is a unique system with which to investigate how weedy plants adapt to an agricultural environment. Our finding that extensive introgression from local cultivars, combined with the continuing ability to maintain weedy genes, is characteristic of weedy rice in northern

分类号： Q94

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