The role of doublesex in the evolution of exaggerated horns in the Japanese rhinoceros beetle

Yuta Ito, Ayane Harigai, Moe Nakata, Tadatsugu Hosoya, Kunio Araya, Yuichi Oba, Akinori Ito, Takahiro Ohde, Toshinobu Yaginuma, Teruyuki Niimi

Research output: Contribution to journalArticlepeer-review

44 Citations (Scopus)

Abstract

Male-specific exaggerated horns are an evolutionary novelty and have diverged rapidly via intrasexual selection. Here, we investigated the function of the conserved sex-determination gene doublesex (dsx) in the Japanese rhinoceros beetle (Trypoxylus dichotomus) using RNA interference (RNAi). Our results show that the sex-specific T. dichotomus dsx isoforms have an antagonistic function for head horn formation and only the male isoform has a role for thoracic horn formation. These results indicate that the novel sex-specific regulation of dsx during horn morphogenesis might have been the key evolutionary developmental event at the transition from sexually monomorphic to sexually dimorphic horns.

Original languageEnglish
Pages (from-to)561-567
Number of pages7
JournalEMBO Reports
Volume14
Issue number6
DOIs
Publication statusPublished - Jun 2013

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Molecular Biology
  • Genetics

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