Comparative analysis of the brain transcriptome in a hyper-aggressive fruit fly, Drosophila prolongata

Ayumi Kudo, Shuji Shigenobu, Koji Kadota, Masafumi Nozawa, Tomoko F. Shibata, Yukio Ishikawa, Takashi Matsuo

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

Aggressive behavior is observed in many animals, but its intensity differs between species. In a model animal of genetics, Drosophila melanogaster, genetic basis of aggressive behavior has been studied intensively, including transcriptome analyses to identify genes whose expression level was associated with intra-species variation in aggressiveness. However, whether these genes are also involved in the evolution of aggressiveness among different species has not been examined. In this study, we performed de novo transcriptome analysis in the brain of Drosophila prolongata to identify genes associated with the evolution of aggressiveness. Males of D. prolongata were hyper-aggressive compared with closely related species. Comparison of the brain transcriptomes identified 21 differentially expressed genes in males of D. prolongata. They did not overlap with the list of aggression-related genes identified in D. melanogaster, suggesting that genes involved in the evolution of aggressiveness were independent of those associated with the intra-species variation in aggressiveness in Drosophila. Although females of D. prolongata were not aggressive as the males, expression levels of the 21 genes identified in this study were more similar between sexes than between species.

Original languageEnglish
Pages (from-to)11-20
Number of pages10
JournalInsect Biochemistry and Molecular Biology
Volume82
DOIs
Publication statusPublished - 2017 Mar 1

Keywords

  • Gene expression levels
  • Inter-species comparison
  • RNA-seq analysis
  • de novo transcriptome analysis

ASJC Scopus subject areas

  • Biochemistry
  • Molecular Biology
  • Insect Science

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