The sex-determination genes fruitless and doublesex specify a neural substrate required for courtship song.
The sex-determination genes fruitless and doublesex specify a neural substrate required for courtship song.
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DOI:
10.1016/j.cub.2007.07.047
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发表时间:
2007-09-04
期刊:
影响因子:
9.2
通讯作者:
Goodwin, Stephen F.
中科院分区:
文献类型:
--
作者:
Rideout, Elizabeth J.;Billeter, Jean-Christophe;Goodwin, Stephen F.
Courtship song is a critical component of male courtship behavior in Drosophila, making the female more receptive to copulation and communicating species-specific information. Sex mosaic studies have shown that the sex of certain regions of the central nervous system (CNS) is critical to song production. Our examination of one of these regions, the mesothoracic ganglion (Msg), revealed the coexpression of two sex-determination genes, fruitless (fru) and doublesex (dsx). Because both genes are involved in creating a sexually dimorphic CNS and are necessary for song production, we investigated the individual contributions of fru and dsx to the specification of a male CNS and song production. We show a novel requirement for dsx in specifying a sexually dimorphic population of fru-expressing neurons in the Msg. Moreover, by using females constitutively expressing the male-specific isoforms of fru (FruM), we show a critical requirement for the male isoform of dsx (DsxM), alongside FruM, in the specification of courtship song. Therefore, although FruM expression is sufficient for the performance of many male-specific behaviors, we have shown that without DsxM, the determination of a male-specific CNS and thus a full complement of male behaviors are not realized.
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