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

A - Papers appearing in refereed journals

Morales-Hojas, R., Jingxuan, S., Alvira-Iraizoz, F., Tan, X. and Chen, J. 2020. Contrasting population structure and demographic history of cereal aphids in different environmental and agricultural landscapes. Ecology and Evolution. 10 (18), pp. 9647-9662. https://doi.org/10.1002/ece3.6565

AuthorsMorales-Hojas, R., Jingxuan, S., Alvira-Iraizoz, F., Tan, X. and Chen, J.
Abstract

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 optimise control programmes. Here, we have studied the population genetic diversity and evolution of Sitobion avenae and Sitobion 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 are different from that described in previous studies, which suggests that they have evolved recently possibly as a response to human-induced changes in agriculture. This study shows that S. avenae in 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. miscanthi populations 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. Unlike S. avenae in England, there is no evidence for insecticide resistance and there is no predominance of a single lineage in S. miscanthi in China.

KeywordsCereal aphids; Population genetics; China; England; Insecticide resistance
Year of Publication2020
JournalEcology and Evolution
Journal citation10 (18), pp. 9647-9662
Digital Object Identifier (DOI)https://doi.org/10.1002/ece3.6565
Open accessPublished as ‘gold’ (paid) open access
FunderBiotechnology and Biological Sciences Research Council
Funder project or codeUK-China Joint Centre for Sustainable Intensification in Agriculture (CSIA).
BBSRC Strategic Programme in Smart Crop Protection
The Rothamsted Insect Survey - National Capability [2017-2022]
Publisher's version
Accepted author manuscript
Output statusPublished
Publication dates
Online11 Sep 2020
Publication process dates
Accepted10 Jun 2020
PublisherWiley
ISSN2045-7758

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