Genomic revolution of US weedy rice in response to 21st century agricultural technologies

• 全文链接

应对21世纪农业技术的美国杂草稻基因组革命

关键词：

来源：

COMMUNICATIONS BIOLOGY

全文链接：

//agri.nais.net.cn/topic/downloadFile/9fb1d950-9899-4e85-92a5-e3bdf2249ff7

来源地址：

//agri.nais.net.cn/topic/downloadFile/9fb1d950-9899-4e85-92a5-e3bdf2249ff7

资源所属：

杂交水稻专题

类型：

学术文献

语种：

英语

原文发布日期：

2022-09-08

摘要：

Weedy rice is a close relative of cultivated rice that devastates rice productivity worldwide. In the southern United States, two distinct strains have been historically predominant, but the 21(st) century introduction of hybrid rice and herbicide resistant rice technologies has dramatically altered the weedy rice selective landscape. Here, we use whole-genome sequences of 48 contemporary weedy rice accessions to investigate the genomic consequences of crop-weed hybridization and selection for herbicide resistance. We find that population dynamics have shifted such that most contemporary weeds are now crop-weed hybrid derivatives, and that their genomes have subsequently evolved to be more like their weedy ancestors. Haplotype analysis reveals extensive adaptive introgression of cultivated alleles at the resistance gene ALS, but also uncovers evidence for convergent molecular evolution in accessions with no signs of hybrid origin. The results of this study suggest a new era of weedy rice evolution in the United States.