A role for a neo-sex chromosome in stickleback speciation.
A role for a neo-sex chromosome in stickleback speciation.
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作者：
性对抗，或两性之间的冲突，被认为是性染色体更新和物种形成的驱动力。虽然密切相关的物种往往有不同的性染色体系统，它是未知的性染色体更替是否有助于物种之间的生殖隔离的演变。在这项研究中，我们表明，一个新进化的性染色体窝藏的基因，有助于物种在threespine棘鱼（Gasterosteus aculeatus）。我们首先确定了一个新的性染色体系统，只发现在一个成员的同域物种对在日本。然后，我们进行了遗传连锁图谱的男性特异性特征的重要生殖隔离之间的日本物种对。新的X染色体窝藏基因座的男性求爱显示特性，有助于行为隔离，而祖先的X染色体包含基因座的行为隔离和杂交雄性不育。我们的工作不仅提供了强有力的证据表明，在脊椎动物系统中的生殖隔离的大X的影响，但也提供了直接的证据，年轻的新X染色体之间的生殖隔离密切相关的物种。我们的数据表明，性染色体周转可能发挥更大的作用，在物种形成比以前认识到。
Sexual antagonism, or conflict between the sexes, has been proposed as a driving force in both sex chromosome turnover and speciation. Although closely related species often have different sex chromosome systems, it is unknown whether sex chromosome turnover contributes to the evolution of reproductive isolation between species. In this study, we show that a newly evolved sex chromosome harbours genes that contribute to speciation in threespine stickleback fish (Gasterosteus aculeatus). We first identified a neo-sex chromosome system found only in one member of a sympatric species pair in Japan. We then performed genetic linkage mapping of male-specific traits important for reproductive isolation between the Japanese species pair. The neo-X chromosome harbours loci for male courtship display traits that contribute to behavioural isolation, while the ancestral X chromosome contains loci for both behavioural isolation and hybrid male sterility. Our work not only provides strong evidence for a large-X effect on reproductive isolation in a vertebrate system, but also provides direct evidence that a young neo-X chromosome contributes to reproductive isolation between closely related species. Our data suggest that sex chromosome turnover might play a greater role in speciation than previously appreciated.
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刺鱼（gasterosteidae）性染色体的更新。
影响因子：
4.5
作者：
Ross JA;Urton JR;Boland J;Shapiro MD;Peichel CL
通讯作者：
Peichel CL
DOI：
10.1073/pnas.231478798
发表时间：
2001-11-06
影响因子：
11.1
作者：
Tao, Y;Hartl, DL;Laurie, CC
通讯作者：
Laurie, CC
影响因子：
3.3
作者：
RICE, WR
通讯作者：
RICE, WR
DOI：
10.1111/j.1095-8312.2006.00558.x
发表时间：
2006-01-01
影响因子：
1.9
作者：
Mank, JE;Promislow, DEL;Avise, JC
通讯作者：
Avise, JC
影响因子：
1.5
作者：
Lande, R;Seehausen, O;van Alphen, JJM
通讯作者：
van Alphen, JJM