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The transcriptomic signature of responses to larval crowding in Drosophila melanogaster

Insect Science 2023年第2期30卷 539-554页

作者： Juliano Morimoto marius wenzel Davina Derous Youn Henry Herve Colinet School of Biological Sciences University of AberdeenAberdeenUnited Kingdom Programa de Pos-graduacao em Ecologia e Conservacao Universidade Federal do ParanaCuritibaBrazil Institute of Mathematics King's CollegeUniversity of AberdeenAberdeenUnited Kingdom CNRS ECOBIO(Ecosystemesbiodiversiteévolution)—UMR 6553University of RennesRennesFrance Department of Ecology and Evolution University of LausanneLausanneSwitzerland

Intraspecific competition at the larval stage is an important ecological factor affecting life-history,adaptation and evolutionary trajectory in holometabolous ***,the molecular pathways underpinning these ecological processes are poorly *** reared Drosophila melanogaster at three egg densities(5,60,and 300 eggs/mL)and sequenced the transcriptomes of pooled third-instar *** also examined emergence time,egg-to-adult viability,adult mass,and adult sex-ratio at each *** crowding had minor detrimental effects on adult phenotypes compared to low density and yielded 24 differentially expressed genes(DEGs),including several chitinase *** contrast,high crowding had substantial detrimental effects on adult phenotypes and yielded 2107 *** these,upregulated gene sets were enriched in sugar,steroid and amino acid metabolism as well as DNA replication pathways,whereas downregulated gene sets were enriched in ABC transporters,taurine,Toll/Imd signaling,and P450 xenobiotics metabolism ***,our findings show that larval crowding has a large consistent effect on several molecular pathways(i.e.,core responses)with few pathways displaying density-specific regulation(i.e.,idiosyncratic responses).This provides important insights into how holometabolous insects respond to intraspecific competition during development.

关键词： intraspecific competition larval crowding life-history trade-offs transcriptomics

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