Arabidopsis hybrid speciation processes
Arabidopsis hybrid speciation processes
复制标题
拟南芥杂交物种形成过程
DOI：
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发表时间：
2011
影响因子：
11.1
通讯作者：
M. Koch
中科院分区：
文献类型：
--
作者：
R. Schmickl;M. Koch
拟南芥属为利用二倍体模式种拟南芥和拟南芥研究植物科学中的基本生物学问题提供了独特的机会。然而，只有少数研究集中在拟南芥的渗入和杂交物种形成，尽管多倍体是该属的常见现象。最近，越来越多的证据表明，不同拟南芥物种之间存在显著的基因流动。到目前为止，我们知道suecica和kamchatica是完全稳定的异源多倍体物种。这两个物种分别在芬诺-斯堪的纳维亚半岛和两栖-白令陆桥地区的更新世冰期和去冰期循环中进化。这些杂交研究要么在系统地理尺度上进行，要么在实验室进行实验重建。在我们的研究中，我们将重点放在区域和人口层面。我们的研究区域位于奥地利东部阿尔卑斯山脉的山麓，这里有两种拟南芥，拟南芥和拟南芥。都是对称分布的。我们的基因渗入、迁移和适应更新世环境变化的假设已经得到证实：我们观察到两个物种之间显著的、主要是单向的基因流动，这导致了四倍体A. lyrata的产生。这种细胞型能够摆脱二倍体水蛭所占据的狭窄生态位。彼得雷亚在石灰岩上露头，向北迁移到硅质地区，留下了遗传分化的痕迹。
The genus Arabidopsis provides a unique opportunity to study fundamental biological questions in plant sciences using the diploid model species Arabidopsis thaliana and Arabidopsis lyrata. However, only a few studies have focused on introgression and hybrid speciation in Arabidopsis, although polyploidy is a common phenomenon within this genus. More recently, there is growing evidence of significant gene flow between the various Arabidopsis species. So far, we know Arabidopsis suecica and Arabidopsis kamchatica as fully stabilized allopolyploid species. Both species evolved during Pleistocene glaciation and deglaciation cycles in Fennoscandinavia and the amphi-Beringian region, respectively. These hybrid studies were conducted either on a phylogeographic scale or reconstructed experimentally in the laboratory. In our study we focus at a regional and population level. Our research area is located in the foothills of the eastern Austrian Alps, where two Arabidopsis species, Arabidopsis arenosa and A. lyrata ssp. petraea, are sympatrically distributed. Our hypothesis of genetic introgression, migration, and adaptation to the changing environment during the Pleistocene has been confirmed: We observed significant, mainly unidirectional gene flow between the two species, which has given rise to the tetraploid A. lyrata. This cytotype was able to escape from the narrow ecological niche occupied by diploid A. lyrata ssp. petraea on limestone outcrops by migrating northward into siliceous areas, leaving behind a trail of genetic differentiation.
影响因子：
3.3
作者：
Alan R. Templeton;K. Crandall;C. Sing
通讯作者：
Alan R. Templeton;K. Crandall;C. Sing
使用多位点基因型数据推断群体结构：连锁位点和相关等位基因频率。
影响因子：
3.3
作者：
Falush,Daniel;Stephens,Matthew;Pritchard,JonathanK
通讯作者：
Pritchard,JonathanK
影响因子：
9.4
作者：
Brennan, Adrian C.;Bridle, Jon R.;Abbott, Richard J.
通讯作者：
Abbott, Richard J.