Department of Natural History, NTNU University Museum, Norwegian University of Science and Technology (NTNU), Trondheim, Norway.
School of Biological Sciences, Monash University, Melbourne, Australia.
Sci Adv. 2022 Aug 26;8(34):eabo5115. doi: 10.1126/sciadv.abo5115. Epub 2022 Aug 24.
Invasive species are a key driver of the global biodiversity crisis, but the drivers of invasiveness, including the role of pathogens, remain debated. We investigated the genomic basis of invasiveness in (common ragweed), introduced to Europe in the late 19th century, by resequencing 655 ragweed genomes, including 308 herbarium specimens collected up to 190 years ago. In invasive European populations, we found selection signatures in defense genes and lower prevalence of disease-inducing plant pathogens. Together with temporal changes in population structure associated with introgression from closely related species, escape from specific microbial enemies likely favored the plant's remarkable success as an invasive species.
入侵物种是全球生物多样性危机的主要驱动因素，但入侵的驱动因素，包括病原体的作用，仍存在争议。我们通过重测序 655 个豚草基因组（包括 308 个采集于 190 年前的标本），研究了（普通豚草）的入侵性的基因组基础，这种植物于 19 世纪末引入欧洲。在入侵的欧洲种群中，我们在防御基因中发现了选择信号，同时植物病原体的发病率也较低。与种群结构的时间变化相关的基因渐渗，以及对特定微生物天敌的逃避，可能使这种植物成为一种极具侵略性的入侵物种。
