Genetic population structure of the alpine species Rhododendron pseudochrysanthum sensu lato (Ericaceae) inferred from chloroplast and nuclear DNA.
Genetic population structure of the alpine species Rhododendron pseudochrysanthum sensu lato (Ericaceae) inferred from chloroplast and nuclear DNA.
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DOI：
10.1186/1471-2148-11-108
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发表时间：
2011-04-19
影响因子：
3.4
通讯作者：
Chiang TY
中科院分区：
文献类型：
--
作者：
Huang CC;Hung KH;Hwang CC;Huang JC;Lin HD;Wang WK;Wu PY;Hsu TW;Chiang TY
具有不同形态或生态分化程度的早期物种复合体为研究物种分化提供了理想的模型。对伪菊杜鹃（Rhododendron pseudochrysanthum s.l）的系统地理学和进化历史进行了研究，发现cpDNA和nrDNA的基因谱系存在系统的不一致性。这两棵树的根系都以高曲红木和台湾红木为基础，它们的复合体的所有成员都缺乏相互的单系性。伪菊cpDNA的空间分布具有明显的遗传分化模式（FST = 0.56 ~ 0.72）。不完全的谱系分选和种间杂交/渐渗可能是造成高花叶、台湾花叶和假菊花叶间缺乏单系性的原因。独立的定殖，加上种子在当前环境下的低传播能力，可能导致不同山区居群间的遗传分化。在人口水平上，中央山脉和佘山山脉的人口可能经历了冰期后的人口扩张，而玉山山脉的人口可能自殖民以来一直保持稳定。相比之下，具有固定cpDNA单倍型的阿里山单一种群可能经历了瓶颈/创始人事件。
A complex of incipient species with different degrees of morphological or ecological differentiation provides an ideal model for studying species divergence. We examined the phylogeography and the evolutionary history of the Rhododendron pseudochrysanthum s. l. Systematic inconsistency was detected between gene genealogies of the cpDNA and nrDNA. Rooted at R. hyperythrum and R. formosana, both trees lacked reciprocal monophyly for all members of the complex. For R. pseudochrysanthum s.l., the spatial distribution of the cpDNA had a noteworthy pattern showing high genetic differentiation (FST = 0.56-0.72) between populations in the Yushan Mountain Range and populations of the other mountain ranges. Both incomplete lineage sorting and interspecific hybridization/introgression may have contributed to the lack of monophyly among R. hyperythrum, R. formosana and R. pseudochrysanthum s.l. Independent colonizations, plus low capabilities of seed dispersal in current environments, may have resulted in the genetic differentiation between populations of different mountain ranges. At the population level, the populations of Central, and Sheishan Mountains may have undergone postglacial demographic expansion, while populations of the Yushan Mountain Range are likely to have remained stable ever since the colonization. In contrast, the single population of the Alishan Mountain Range with a fixed cpDNA haplotype may have experienced bottleneck/founder's events.
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影响因子：
4.9
作者：
Chiang, YC;Hung, KH;Chiang, TY
通讯作者：
Chiang, TY
影响因子：
4.1
作者：
Chung, Jeng-Der;Lin, Tsan-Piao;Hwang, Shih-Ying
通讯作者：
Hwang, Shih-Ying
影响因子：
2.8
作者：
Chiang, TY;Hong, KH;Peng, CI
通讯作者：
Peng, CI
影响因子：
2.4
作者：
Denda, T;Yokota, M
通讯作者：
Yokota, M
影响因子：
4.9
作者：
Chiang, TY;Schaal, BA
通讯作者：
Schaal, BA