4.6 Article

Genome sequencing of a predominant clonal lineage of the grain aphid Sitobion avenae

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出版社

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ibmb.2022.103742

关键词

Grain aphid; Genome; Detoxification; Selection; Gene family expansion

资金

  1. super-computing infrastructure of the NLHPC [ECM-02]
  2. University of Talca postdoc program [100462]
  3. Chilean Ministry of Economy through Iniciativa Cientifica Milenio [NC120027]
  4. ANID-Programa Iniciativa Cientifica [Milenio-ICN17_022]
  5. Comision Nacional de Investigacion Cientifica y Tecnologica CONICYT through Fondecyt [1210713]

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This study reports a highly complete de novo draft genome of the English grain aphid, providing insights into gene family evolution, resistance mechanisms, and invasive success in agroecosystems.
The English grain aphid, Sitobion avenae, is a cosmopolitan pest that feeds on cereals, provoking substantial yield losses by injuring plant tissue and by vectoring plant viruses. Here we report a highly complete, de novo draft genome of the grain aphid using long-read sequencing. We generated an assembly of 2740 contigs with a N50 of 450 kb. We compared this draft genome with that of other aphid species, inspecting gene family evolution, genome-wide positive selection, and searched for horizontal gene transfer events. In addition, we described a recent copy number variant expansion of gene families involving aconitase, ABC transporter, and esterase genes that could be associated with resistance to insecticides and plant chemical defenses. This S. avenae genome obtained from a predominant invasive genotype can provide a framework for studying the spatial-temporal success of these clonal lineages in invaded agroecosystems.

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