Gene Family Expansions in Aphids Maintained by Endosymbiotic and Nonsymbiotic Traits

Genome Biology and Evolution
Rebecca P DuncanAlex C C Wilson

Abstract

Facilitating the evolution of new gene functions, gene duplication is a major mechanism driving evolutionary innovation. Gene family expansions relevant to host/symbiont interactions are increasingly being discovered in eukaryotes that host endosymbiotic microbes. Such discoveries entice speculation that gene duplication facilitates the evolution of novel, endosymbiotic relationships. Here, using a comparative transcriptomic approach combined with differential gene expression analysis, we investigate the importance of endosymbiosis in retention of amino acid transporter paralogs in aphid genomes. To pinpoint the timing of amino acid transporter duplications we inferred gene phylogenies for five aphid species and three outgroups. We found that while some duplications arose in the aphid common ancestor concurrent with endosymbiont acquisition, others predate aphid divergence from related insects without intracellular symbionts, and still others appeared during aphid diversification. Interestingly, several aphid-specific paralogs have conserved enriched expression in bacteriocytes, the insect cells that host primary symbionts. Conserved bacteriocyte enrichment suggests that the transporters were recruited to the aphid/endosymbiont...Continue Reading

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Citations

Nov 1, 2016·Nature Reviews. Microbiology·Angela E Douglas
Dec 23, 2017·Molecular Ecology·Honglin FengAlex C C Wilson
Aug 31, 2018·Genome Biology and Evolution·Peter ThorpeJorunn I B Bos
Jun 8, 2019·Molecular Biology and Evolution·Yiyuan LiNancy A Moran
May 3, 2020·Molecular Biology and Evolution·Rosa FernándezDenis Tagu
Jul 25, 2019·Proceedings of the National Academy of Sciences of the United States of America·Honglin FengDavid T Thwaites
Jul 28, 2018·G3 : Genes - Genomes - Genetics·Edward B JamesAlex C C Wilson
Nov 26, 2020·Scientific Reports·Lucy M GormanSimon K Davy
Feb 29, 2020·Insect Biochemistry and Molecular Biology·Rosanna GiordanoUNKNOWN Soybean aphid research community

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Datasets Mentioned

BETA
PRJNA296778
SRX1304838
PRJNA301746
PRJNA294954

Methods Mentioned

BETA
RNAseq

Software Mentioned

RAxML
Seaview
TRIMAL
BLAST
TBLASTN
PERL script
SumTrees
PERL
bowtie2
edgeR

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