Chloroplast diversity and population differentiation of Castanopsis fargesii (Fagaceae): a dominant tree species in evergreen broad-leaved forest of subtropical China
Chloroplast diversity and population differentiation of Castanopsis fargesii (Fagaceae): a dominant tree species in evergreen broad-leaved forest of subtropical China
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中国亚热带常绿阔叶林优势树种壳斗科叶绿体多样性及种群分化
DOI：
10.1007/s11295-014-0776-3
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发表时间：
2014-07
期刊：
影响因子：
--
通讯作者：
Fabian Vargas-Mendoza, Carlos
中科院分区：
文献类型：
--
作者：
Sun, Ye;Hu, Huaqiang;Huang, Hongwen;Fabian Vargas-Mendoza, Carlos
中国的亚热带森林构成了东亚主要的常绿阔叶林。由于亚热带中国地区自西向东地貌和环境变化较大，其核心树种的遗传分化是可以预见的。本研究利用8个叶绿体微卫星标记对分布于中国大陆中国地区的27个种群的652个个体进行了遗传多样性、种群分化和种群历史的研究。种群间的系统地理结构通过排列检验得到，NST显著高于GST。种群间存在较强的遗传分化，符合距离隔离模型。此外，在人群中检测到明显的海拔隔离。通过近似贝叶斯计算(ABC)揭示了西部、中部和东部地区之间的显著遗传差异。这种遗传分化可能反映了更新世云贵高原和武夷山山脉快速剧烈隆升的区域响应。在西部、中部和东部发现了收缩-膨胀过程，表明地貌改造和更新世的气候变化对华东冷杉的遗传结构产生了强烈的影响。
Subtropical forests in China constitute the major expanse of evergreen broad-leaved forest in East Asia. The significant genetic divergence of the keystone tree species should be expected due to the huge geomorphological and environmental changes from west to east in subtropical China. In this study, a total of 652 individuals from 27 populations of Castanopsis fargesii throughout its natural range in mainland China were genotyped with eight chloroplast microsatellite markers to investigate genetic diversity, population differentiation, and demographic history of C. fargesii. Phylogeographic structure among populations of C. fargesii was evidenced by the permutation test, revealing that NST was significantly higher than GST. The strong genetic differentiation found among populations was well in accordance with isolation-by-distance model. In addition, significant isolation by elevation was detected among populations. Significant genetic differentiations were revealed among the west, center, and east regions by approximate Bayesian computations (ABC). The genetic divergence might reflect the regional responses to the fast and dramatic uplift of Yunnan-Guizhou Plateau and Wuyi mountain range in the Pleistocene. In the present study, contraction-expansion process was detected in the west, center, and east regions, indicating that geomorphological remodeling together with climatic changes in the Pleistocene had strong impact on genetic structure of C. fargesii.
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影响因子：
2.8
作者：
Cindy Q. Tang;M. Ohsawa
通讯作者：
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影响因子：
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作者：
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通讯作者：
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