Divergent selection on opsins drives incipient speciation in Lake Victoria cichlids

Yohey Terai, Ole Seehausen, Takeshi Sasaki, Kazuhiko Takahashi, Shinji Mizoiri, Tohru Sugawara, Tetsu Sato, Masakatsu Watanabe, Nellie Konijnendijk, Hillary D.J. Mrosso, Hidenori Tachida, Hiroo Imai, Yoshinori Shichida, Norihiro Okada

研究成果: Contribution to journalArticle査読

143 被引用数 (Scopus)

抄録

Divergent natural selection acting on ecological traits, which also affect mate choice, is a key element of ecological speciation theory, but has not previously been demonstrated at the molecular gene level to our knowledge. Here we demonstrate parallel evolution in two cichlid genera under strong divergent selection in a gene that affects both. Strong divergent natural selection fixed opsin proteins with different predicted light absorbance properties at opposite ends of an environmental gradient. By expressing them and measuring absorbance, we show that the reciprocal fixation adapts populations to divergent light environments. The divergent evolution of the visual system coincides with divergence in male breeding coloration, consistent with incipient ecological by-product speciation.

本文言語英語
ページ(範囲)2244-2251
ページ数8
ジャーナルPLoS Biology
4
12
DOI
出版ステータス出版済み - 12 2006

All Science Journal Classification (ASJC) codes

  • 神経科学(全般)
  • 生化学、遺伝学、分子生物学(全般)
  • 免疫学および微生物学(全般)
  • 農業および生物科学(全般)

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