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首页> 外文期刊>Zoological Science >The XX-XY sex-determination system in Oryzias luzonensis and O. mekongensis revealed by the sex ratio of the progeny of sex-reversed fish.
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The XX-XY sex-determination system in Oryzias luzonensis and O. mekongensis revealed by the sex ratio of the progeny of sex-reversed fish.

机译：通过性反转鱼后代的性别比揭示了水稻（Oryzias luzonensis）和湄公河（O. mekongensis）的XX-XY性别决定系统。

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摘要

The sex-determining gene in Oryzias latipes and O. curvinotus has been proved to be DMY. Although O. curvinotus has the DMY gene on the Y chromosome which is homologous to the Y chromosome of O. latipes, the sex-determining mechanism of other Oryzias fishes has not been identified. In order to uncover the sex-determining mechanism of O. luzonensis and O. mekongensis, which are most closely related species to O. latipes and O. curvinotus, we analysed the sex ratio of the progeny of sex-reversed fish. We were able to obtain sex-reversed males by the administration of methyltestosterone, and found that these yielded all-female offspring in both species. These results indicate that O. luzonensis and O. mekongensis have the XX-XY sex-determination system.
机译：证实了Oryzias latipes和O.curvinotus的性别决定基因是DMY。尽管O.curvinotus的Y染色体上的DMY基因与O. latipes的Y染色体同源，但尚未确定其他稻类鱼类的性别决定机制。为了揭示与O. latipes和O. curvinotus关系最密切的物种O. luzonensis和O. mekongensis的性别决定机制，我们分析了逆性鱼后代的性别比。通过使用甲基睾丸激素，我们能够获得性反转的雄性，并发现它们在这两个物种中都产生了全雌性后代。这些结果表明，吕宋曲霉和湄公河曲霉具有XX-XY性别决定系统。

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