Variation among 532 genomes unveils the origin and evolutionary history of a global insect herbivore

作者：Minsheng You, Fushi Ke, Shijun You, Zhangyan Wu, Qingfeng Liu, Weiyi He, Simon W. Baxter, Zhiguang Yuchi, Liette Vasseur, Geoff M. Gurr, Christopher M. Ward, Hugo Cerda, Guang Yang, Peng Lü, Yuan-Chun Jin, Miao Xie, Lijun Cai, Carl J. Douglas, Murray B. Isman, Mark S. Goettel, Qisheng Song, Qing‐Hai Fan, Gefu Wang‐Pruski, David C. Lees, Zhen Yue, Jianlin Bai, Tiansheng Liu, Lianyun Lin, Yunkai Zheng, Zhaohua Zeng, Sheng Lin, Yue Wang, Qian Zhao, Xiaofeng Xia, Wenbin Chen, Li‐Lin Chen, Mingmin Zou, Jinying Liao, Qiang Gao, Xiaodong Fang, Ye Yin, Huanming Yang, Jian Wang, Liwei Han, Yingjun Lin, Yanping Lu, Mousheng Zhuang · 发表于：Nature Communications · 年份：2020 · DOI：10.1038/s41467-020-16178-9 · 被引用次数：93 · 研究领域：Plant and animal studies、Insect-Plant Interactions and Control、Forest Insect Ecology and Management

The diamondback moth, Plutella xylostella is a cosmopolitan pest that has evolved resistance to all classes of insecticide, and costs the world economy an estimated US $4-5 billion annually. We analyse patterns of variation among 532 P. xylostella genomes, representing a worldwide sample of 114 populations. We find evidence that suggests South America is the geographical area of origin of this species, challenging earlier hypotheses of an Old-World origin. Our analysis indicates that Plutella xylostella has experienced three major expansions across the world, mainly facilitated by European colonization and global trade. We identify genomic signatures of selection in genes related to metabolic and signaling pathways that could be evidence of environmental adaptation. This evolutionary history of P. xylostella provides insights into transoceanic movements that have enabled it to become a worldwide pest.