Environmental heterogeneity drives population genetic divergence of a key agricultural pest, Empoasca onukii

文献类型： 外文期刊

第一作者： Li, Jinyu

作者： Li, Jinyu;Shi, Longqing;Chen, Wei;Mao, Yi;Vasseur, Liette;Gurr, Geoff;You, Minsheng;You, Shijun;Li, Jinyu;Mao, Yi;Li, Jinyu;Shi, Longqing;Chen, Wei;Mao, Yi;Vasseur, Liette;Gurr, Geoff;You, Minsheng;You, Shijun;Li, Jinyu;Shi, Longqing;Chen, Wei;Mao, Yi;You, Minsheng;You, Shijun;Shi, Longqing;Vasseur, Liette;Gurr, Geoff

作者机构：

关键词： climate change; adaptation; landscape genetics; evolution; population divergence

期刊名称：ENTOMOLOGIA GENERALIS （ 影响因子：6.9； 五年影响因子：5.2 ）

ISSN： 0171-8177

年卷期： 2023 年 43 卷 2 期

页码：

收录情况： SCI

摘要： Genetic variance and functional connectivity are key for species resilience to environmental change. The tea green leafhopper Empoasca onukii has become the predominant and ubiquitous insect pest of tea in East Asia over the past decades, presenting an opportunity to explore associations between genetic variation/functional connectivity and environment. Here, we examined inter-population genetic differentiation of E. onukii, and explicitly quantified the contributions of geographic distance, environmental heterogeneity, and landscape barriers, using data from 1704 individuals from 56 locations in mainland China and offshore islands. Analyses showed a pattern of reduced gene flow and higher genetic dif- ferentiation across the mountainous region of Western China, and the islands of Taiwan and Hainan. Aside the expected influence of geographic distance and landscape barriers, climatic differences contributed more strongly to population diver- gence than geographic distance and landscape barriers. Additionally, population genetic diversity significantly increased with the amplitude of local temperature fluctuations. These results suggest that the spatial genetic structure of E. onukii is primarily shaped by climatic differences. The findings may explain the observed increasing outbreak frequency under climate change and suggest a potentially good adaptation and accelerating performance of E. onukii under more variable future temperatures. This situation may also apply to other arthropod pests that have become more problematic under climate change. More broadly, this study demonstrates the usefulness of molecular genetic approaches in addressing the effects of environmental heterogeneity on natural population genetic variation.

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