Introgression and selection shaping the genome and adaptive loci of weedy rice in northern China.
Introgression and selection shaping the genome and adaptive loci of weedy rice in northern China.
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DOI：
10.1111/nph.12012
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
Jian Sun;Q. Qian;Dianrong Ma;Zhengjin Xu;Dan Liu;Hongyang Du;Wenfu Chen
中科院分区：
文献类型：
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作者：
Jian Sun;Q. Qian;Dianrong Ma;Zhengjin Xu;Dan Liu;Hongyang Du;Wenfu Chen
杂草稻作为稻田中的一种杂草，已经在世界范围内蔓延开来。在过去的二十年里，中国北方杂草水稻的种植一直在迅速扩张。其进化历史和适应机制尚不清楚。利用在水稻基因组中取样的假定中性标记，分析了北方杂草稻与水稻品种之间的进化关系。对水稻驯化相关基因在杂草水稻适应中的潜在作用进行了评估。种子寿命是杂草稻的一个重要性状，在杂草稻与一个水稻品种杂交的F(2)群体中进行了研究，以评估杂草稻的适应性和候选基因的潜在影响。中国北方的杂草稻不是直接从近缘野生稻种或籼稻亚种的渐渗而来。与地方品种的渐渗，加上保持杂草特性的选择，形成了中国北方杂草稻的进化。杂草水稻是一个独特的系统，用来研究杂草植物如何适应农业环境。我们的研究发现，来自地方品种的广泛渗入，结合持续保持杂草基因的能力，是中国北方杂草稻的特征，为杂草稻的田间防治提供了线索。
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 F(2) 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 from closely 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 China provides a clue for the field control of weedy rice.