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Testing for adaptive changes linked to range expansion following a single introduction of the fall webworm

文献类型： 外文期刊

作者： Dai, Jin-Xu 1 ; Cao, Li-Jun 2 ; Chen, Jin-Cui 2 ; Yang, Fangyuan 2 ; Shen, Xiu-Jing 2 ; Ma, Li-Jun 2 ; Hoffmann, Ary Anthony 3 ; Chen, Min 1 ; Wei, Shu-Jun 2 ;

作者机构： 1.Beijing Forestry Univ, Beijing Key Lab Forest Pests Control, Beijing, Peoples R China

2.Beijing Acad Agr & Forestry Sci, Inst Plant Protect, 9 Shuguanghuayuan Middle Rd, Beijing 100097, Peoples R China

3.Univ Melbourne, Bio21 Inst, Sch Biosci, Parkville, Vic, Australia

4.Beijing Forestry Univ, Coll Forestry, Beijing Key Lab Forest Pests Control, 35 Qinghua East Rd, Beijing 100083, Peoples R China

关键词： climate change; Hyphantria cunea; invasive alien species; local adaptation; population genetic structure

期刊名称：MOLECULAR ECOLOGY （ 影响因子：4.9； 五年影响因子：5.6 ）

ISSN： 0962-1083

年卷期： 2023 年

页码：

收录情况： SCI

摘要： Adaptive evolution following colonization can affect the impact of invasive species. The fall webworm (FWW) invaded China 40 years ago through a single introduction event involving a severe bottleneck and subsequently diverged into two genetic groups. The well-recorded invasion history of FWW, coupled with a clear pattern of genetic divergence, provides an opportunity to investigate whether there is any sign of adaptive evolution following the invasion. Based on genome-wide SNPs, we identified genetically separated western and eastern groups of FWW and correlated spatial variation in SNPs with geographical and climatic factors. Geographical factors explained a similar proportion of the genetic variation across all populations compared with climatic factors. However, when the two population groups were analysed separately, environmental factors explained more variation than geographical factors. SNP outliers in populations of the western group had relatively stronger response to precipitation than temperature-related variables. Functional annotation of SNP outliers identified genes associated with insect cuticle protein potentially related to desiccation adaptation in the western group and genes associated with lipase biosynthesis potentially related to temperature adaptation in the eastern group. Our study suggests that invasive species may maintain the evolutionary potential to adapt to heterogeneous environments despite a single invasion event. The molecular data suggest that quantitative trait comparisons across environments would be worthwhile.

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