Contrasting population structure and demographic history of cereal aphids in different environmental and agricultural landscapes

文献类型： 外文期刊

第一作者： Morales-Hojas, Ramiro

作者： Morales-Hojas, Ramiro;Alvira Iraizoz, Fernando;Sun, Jingxuan;Tan, Xiaoling;Chen, Julian;Sun, Jingxuan

作者机构：

关键词： cereal aphids; China; England; insecticide resistance; population genetics

期刊名称：ECOLOGY AND EVOLUTION （ 影响因子：2.912； 五年影响因子：3.271 ）

ISSN： 2045-7758

年卷期： 2020 年 10 卷 18 期

页码：

收录情况： SCI

摘要： Genetic diversity of populations has important ecological and evolutionary consequences, whose understanding is fundamental to improve the sustainability of agricultural production. Studies of how differences in agricultural management and environment influence the population structure of insect pests are central to predict outbreaks and optimize control programs. Here, we have studied the population genetic diversity and evolution ofSitobion avenaeandSitobion miscanthi, which are among the most relevant aphid pests of cereals across Europe and Asia, respectively. We have used genotyping by sequencing (GBS) to identify genome-wide single nucleotide polymorphisms (SNPs) to infer the geographic structure and migration patterns. In the present study, we show that the population structure in present-day populations is different from that described in previous studies, which suggest that they have evolved recently possibly as a response to human-induced changes in agriculture. This study shows thatS. avenaein England is predominantly parthenogenetic and there has been a demographic and spatial expansion of a single genetic cluster, which could correspond with the insecticide resistance superclone identified in previous studies. Conversely, in China,S. miscanthipopulations are mostly cyclical parthenogenetic, with one sexual stage in autumn to produce overwintering eggs, and there are six genetically differentiated subpopulations and high genetic differentiation between geographic locations, which suggests that further taxonomical research is needed. UnlikeS. avenaein England, there is no evidence for insecticide resistance and there is no predominance of a single lineage inS. miscanthiin China.

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