Genomic insights into the postintroduction failure of the Asian icefish Protosalanx chinensis in China
文献类型： 外文期刊
作者： Qi, Jiwei 1 ; Pan, Huijuan 2 ; Wang, Xiaochen 1 ; Xuan, Zhongya 4 ; Pan, Xiaofu 5 ; Li, Xuanzhao 1 ; Shen, Ying 1 ; Yang, Jian 7 ; Zhang, Jie 1 ; Li, Ming 1 ;
作者机构： 1.CAS Key Lab Anim Ecol & Conservat Biol, Inst Zool, Beijing, Peoples R China
2.Beijing Forestry Univ, Sch Ecol & Nat Conservat, Beijing, Peoples R China
3.Univ Chinese Acad Sci, Coll Life Sci, Beijing, Peoples R China
4.Nanjing Agr Univ, Wuxi Fisheries Coll, Wuxi, Peoples R China
5.Chinese Acad Sci, Kunming Inst Zool, State key Lab Genet Resources & Evolut, Kunming, Peoples R China
6.Hebei Univ, Coll Life Sci, Baoding, Peoples R China
7.Chinese Acad Fishery Sci, Freshwater Fisheries Res Ctr, Key Lab Fishery Ecol Environm Assessment & Resourc, Wuxi, Peoples R China
8.Chinese Acad Sci, Ctr Excellence Anim Evolut & Genet, Kunming, Peoples R China
9.Chinese Acad Sci, Inst Zool, Key Lab Anim Ecol & Conservat Biol, 1 5 Beichenxi Rd, Beijing 100101, Peoples R China
关键词： adaptation; genetic load; population genomics; postintroduction extinctions; salangids; sampling effects
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 32 卷 14 期
页码：
收录情况： SCI
摘要： Biological introductions provide a natural ecological experiment unfolding in a recent historical timeframe to elucidate how evolutionary processes (such as founder effects, genetic diversity and adaptation) shape the genomic landscape of populations postintroduction. The Asian icefish, Protosalanx chinensis, is an economically important fishery resource, deliberately introduced into dozens of provinces across China for decades. However, while invading and disturbing the local ecosystem, many introduced populations declined, disappearing mysteriously in a very short time. The way in which various evolutionary forces integrate to result in invasion failure of an introduced population remains unknown. Here, we performed whole-genome sequencing of 10 species from the Salangidae family and 70 Asian icefish (Protosalanx chinensis) individuals from 7 geographic populations in China, aiming to characterize the evolutionary fate of introduced populations. Our results show that compared to other Salangidae species, P. chinensis has low genetic diversity, potentially due to the long-lasting decline in population size. In a recently introducted population, Lugu lake, severe sampling effects and a strong bottleneck further deteriorated the genomic landscape. Although the introduced population showed signs of reduced genetic load, the purging selection efficiency was low. Our selective sweep analysis revealed site frequency changes in candidate genes, including gata1a and hoxd4b, which could be associated with a decrease in dissolved oxygen in the deep-water plateau lake. These findings caution against the widespread introduction of P. chinensis in China and lay the groundwork for future use of this economically species.
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