The role of doublesex in the evolution of exaggerated horns in the Japanese rhinoceros beetle
The role of doublesex in the evolution of exaggerated horns in the Japanese rhinoceros beetle
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DOI：
10.1038/embor.2013.50
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发表时间：
2013-06-01
期刊：
影响因子：
7.7
通讯作者：
Niimi, Teruyuki
中科院分区：
文献类型：
--
作者：
Ito, Yuta;Harigai, Ayane;Niimi, Teruyuki
雄性特有的夸张的角是一种进化上的新奇事物，并通过性内选择迅速分化。在这里，我们调查的功能保守的性别决定基因doublex（dsx）在日本犀牛甲虫（Trypoxylus dichotomus）使用RNA干扰（RNAi）。我们的研究结果表明，性别特异性T。二叉属DSX同种型对头角形成具有拮抗功能，并且只有雄性同种型对胸角形成具有作用。这些结果表明，角形态发生过程中dsx的性别特异性调控可能是角从性单态向性二态转变的关键进化发育事件。
Male-specific exaggerated horns are an evolutionary novelty and have diverged rapidly via intrasexual selection. Here, we investigated the function of the conserved sex-determination gene doublesex (dsx) in the Japanese rhinoceros beetle (Trypoxylus dichotomus) using RNA interference (RNAi). Our results show that the sex-specific T. dichotomus dsx isoforms have an antagonistic function for head horn formation and only the male isoform has a role for thoracic horn formation. These results indicate that the novel sex-specific regulation of dsx during horn morphogenesis might have been the key evolutionary developmental event at the transition from sexually monomorphic to sexually dimorphic horns.