Teasing apart the joint effect of demography and natural selection in the birth of a contact zone.
Teasing apart the joint effect of demography and natural selection in the birth of a contact zone.
复制标题
DOI：
10.1111/nph.18480
复制
发表时间：
2022-12
期刊：
影响因子：
9.4
通讯作者：
Lascoux, Martin
中科院分区：
文献类型：
--
作者：
Li, Lili;Milesi, Pascal;Tiret, Mathieu;Chen, Jun;Sendrowski, Janek;Baison, John;Chen, Zhi-Qiang;Zhou, Linghua;Karlsson, Bo;Berlin, Mats;Westin, Johan;Garcia-Gil, Maria Rosario;Wu, Harry X.;Lascoux, Martin
关键词：
由周期性气候循环引起的大规模人口迁移塑造了植物物种的遗传结构。在冰川时期，物种被限制在低纬度的避难所，随着气候的改善，它们从那里迁移到高纬度地区。这种多管齐下的进化导致了许多血统，后来相遇并形成了大的接触区。我们利用5000云杉树的基因组数据，以测试在斯堪的纳维亚半岛的接触区的建立和建立过程中的自然选择的存在。斯堪的纳维亚P. abies今天是由一个起源于波罗的海的南部遗传集群和一个起源于北方俄罗斯的北方遗传集群组成。它们之间的接触带与两个主要气候区之间的界限非常吻合。我们表明，自然选择有助于其建立和维护。首先，具有全基因组连锁选择的隔离迁移模型比纯粹的中性模型更适合数据。第二，许多基因座显示出选择的特征或与环境变量有关。这些基因座在染色体上重组成簇，通常与物候有关。总而言之，我们的研究结果说明了气候周期，同化和选择可以建立强大的本地适应沿着接触带和影响适应性状的遗传结构。
Vast population movements induced by recurrent climatic cycles have shaped the genetic structure of plant species. During glacial periods species were confined to low‐latitude refugia from which they recolonized higher latitudes as the climate improved. This multipronged recolonization led to many lineages that later met and formed large contact zones. We utilize genomic data from 5000 Picea abies trees to test for the presence of natural selection during recolonization and establishment of a contact zone in Scandinavia. Scandinavian P. abies is today made up of a southern genetic cluster originating from the Baltics, and a northern one originating from Northern Russia. The contact zone delineating them closely matches the limit between two major climatic regions. We show that natural selection contributed to its establishment and maintenance. First, an isolation‐with‐migration model with genome‐wide linked selection fits the data better than a purely neutral one. Second, many loci show signatures of selection or are associated with environmental variables. These loci, regrouped in clusters on chromosomes, are often related to phenology. Altogether, our results illustrate how climatic cycles, recolonization and selection can establish strong local adaptation along contact zones and affect the genetic architecture of adaptive traits.
登录
查看更多内容
影响因子：
2.6
作者：
Bernhardsson, Carolina;Vidalis, Amaryllis;Ingvarsson, Par K.
通讯作者：
Ingvarsson, Par K.
影响因子：
9.2
作者：
Chang CC;Chow CC;Tellier LC;Vattikuti S;Purcell SM;Lee JJ
通讯作者：
Lee JJ
影响因子：
3.3
作者：
Coop, Graham;Witonsky, David;Pritchard, Jonathan K.
通讯作者：
Pritchard, Jonathan K.
影响因子：
4.9
作者：
Bucci, G;Vendramin, GG
通讯作者：
Vendramin, GG
影响因子：
7.7
作者：
Fraiesse, Christelle;Popovic, Iva;Roux, Camille
通讯作者：
Roux, Camille