The XX-XY sex-determination system in Oryzias luzonensis and O-mekongensis revealed by the sex ratio of the progeny of sex-reversed fish

被引：23

作者：

Hamaguchi, Satoshi ^{[1
]}

Toyazaki, Yota ^{[1
]}

Shinomiya, Ai ^{[1
]}

Sakaizumi, Mitsuru ^{[1
]}

机构：

[1] Niigata Univ, Grad Sch Sci & Technol, Niigata 9502181, Japan

来源：

ZOOLOGICAL SCIENCE | 2004年 / 21卷 / 10期

关键词：

Oryzias; sex-determination; sex chromosome; sex reversal;

D O I：

10.2108/zsj.21.1015

中图分类号：

Q95 [动物学];

学科分类号：

071002 ;

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 analyzed 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.

引用

页码：1015 / 1018

页数：4

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