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 Julian Chen 2020. Contrasting population structure and demographic history of cereal aphids in different environmental and agricultural landscapes. bioRxiv.

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

Genetic diversity of populations has important ecological and evolutionary consequences, which are 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 fundamental to predict outbreaks and optimise control programmes. Here, we have studied the population genetic diversity and evolution of Sitobion avenae and Sitobion miscanthi (previously mistaken for S. avenae), which are among the most relevant aphid pests of cereals across Europe and China, respectively. We have used a genomic approach that allows the identification of weak geographic structure and migration patterns at scales that were previously not discernible. 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. In the UK, S. avenae is predominantly anholocyclic and, as a result of the evolution of insecticide resistance, a superclone is now dominant across the geographic distribution in the country and the genetic diversity is low. In China, S. miscanthi populations are mostly holocyclic, 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 in the case of 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.

Year of Publication2020
JournalbioRxiv
Digital Object Identifier (DOI)doi:10.1101/2020.01.16.909077
Open accessPublished as green open access
FunderBiotechnology and Biological Sciences Research Council
National Key Technologies R&D Program of China
Funder project or codeUK-China Joint Centre for Sustainable Intensification in Agriculture (CSIA).
The Rothamsted Insect Survey - National Capability [2017-2022]
BBSRC Strategic Programme in Smart Crop Protection
Publisher's version
Supplemental file
Output statusPublished
Publication dates
Online17 Jan 2020
PublisherPublic Library of Science (PLOS)

Permalink - https://repository.rothamsted.ac.uk/item/97188/contrasting-population-structure-and-demographic-history-of-cereal-aphids-in-different-environmental-and-agricultural-landscapes

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