Divergence in sex steroid hormone signaling between sympatric species of Japanese threespine stickleback.
Divergence in sex steroid hormone signaling between sympatric species of Japanese threespine stickleback.
复制标题
DOI：
10.1371/journal.pone.0029253
复制
发表时间：
2011
期刊：
影响因子：
3.7
通讯作者：
Kusakabe M
中科院分区：
文献类型：
--
作者：
Kitano J;Kawagishi Y;Mori S;Peichel CL;Makino T;Kawata M;Kusakabe M
性类固醇介导性二形或性别特异性特征的表达，这些特征对物种内的配偶选择和物种间的行为隔离都很重要。我们调查了性类固醇信号的分歧两个同域物种的threespine棘鱼（Gasterosteus aculeatus）：日本海的形式和太平洋的形式。这些同域形式在雄性展示特征和雌性择偶行为上都存在分歧，共同导致了同域中的不对称行为隔离。在这里，我们发现，血浆中的睾酮和17β-雌二醇水平不同的产卵雌性的两个同域形式。日本海产卵雌鱼脑垂体中FSHβ基因的转录水平也高于太平洋产卵雌鱼脑垂体。相比之下，没有性类固醇检查之间的两种形式的筑巢男性显着不同。然而，将血浆性类固醇数据与睾丸转录组数据相结合表明，睾酮转化为11-酮睾酮的效率可能在不同形式之间存在差异。在形式内，雄性的血浆睾酮水平与雄性的体型显着相关，这是两个同域物种中雌性择偶的重要特征。这些结果表明，性类固醇信号的实质性分歧，可以发生在初期同域物种之间。我们认为，调查的遗传和生态机制的基础分歧激素信号之间的初期同域物种将提供一个更好的理解的机制，在动物物种形成。
Sex steroids mediate the expression of sexually dimorphic or sex-specific traits that are important both for mate choice within species and for behavioral isolation between species. We investigated divergence in sex steroid signaling between two sympatric species of threespine stickleback (Gasterosteus aculeatus): the Japan Sea form and the Pacific Ocean form. These sympatric forms diverge in both male display traits and female mate choice behaviors, which together contribute to asymmetric behavioral isolation in sympatry. Here, we found that plasma levels of testosterone and 17β-estradiol differed between spawning females of the two sympatric forms. Transcript levels of follicle-stimulating hormone-β (FSHβ) gene were also higher in the pituitary gland of spawning Japan Sea females than in the pituitary gland of spawning Pacific Ocean females. By contrast, none of the sex steroids examined were significantly different between nesting males of the two forms. However, combining the plasma sex steroid data with testis transcriptome data suggested that the efficiency of the conversion of testosterone into 11-ketotestosterone has likely diverged between forms. Within forms, plasma testosterone levels in males were significantly correlated with male body size, a trait important for female mate choice in the two sympatric species. These results demonstrate that substantial divergence in sex steroid signaling can occur between incipient sympatric species. We suggest that investigation of the genetic and ecological mechanisms underlying divergence in hormonal signaling between incipient sympatric species will provide a better understanding of the mechanisms of speciation in animals.
登录
查看更多内容
影响因子：
2.7
作者：
BORG, B
通讯作者：
BORG, B
影响因子：
2.7
作者：
Hellqvist, A;Bornestaf, C;Schmitz, M
通讯作者：
Schmitz, M
DOI：
10.1111/j.1095-8312.1990.tb00512.x
发表时间：
1990-03-01
影响因子：
1.9
作者：
BLOUW, DM;HAGEN, DW
通讯作者：
HAGEN, DW
影响因子：
2.1
作者：
Cox, R. M.;Stenquist, D. S.;Calsbeek, R.
通讯作者：
Calsbeek, R.
影响因子：
2.5
作者：
Bell, AM
通讯作者：
Bell, AM