Molecular cloning of doublesex genes of four cladocera (water flea) species

Kenji Toyota, Yasuhiko Kato, Masaru Sato, Naomi Sugiura, Shinichi Miyagawa, Hitoshi Miyakawa, Hajime Watanabe, Shigeto Oda, Yukiko Ogino, Chizue Hiruta, Takeshi Mizutani, Norihisa Tatarazako, Susanne Paland, Craig Jackson, John K Colbourne, Taisen Iguchi

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Abstract

The gene doublesex (dsx) is known as a key factor regulating genetic sex determination in many organisms. We previously identified two dsx genes (DapmaDsx1 and DapmaDsx2) from a freshwater branchiopod crustacean, Daphnia magna, which are expressed in males but not in females. D. magna produces males by parthenogenesis in response to environmental cues (environmental sex determination) and we showed that DapmaDsx1 expression during embryonic stages is responsible for the male trait development. The D. magna dsx genes are thought to have arisen by a cladoceran-specific duplication; therefore, to investigate evolutionary conservation of sex specific expression of dsx genes and to further assess their functions in the environmental sex determination, we searched for dsx homologs in four closely related cladoceran species.
Original languageEnglish
Article number239
JournalBMC Genomics
Volume14
Issue number1
DOIs
Publication statusPublished - 10 Apr 2013

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