Nuclear and chloroplast DNA phylogeography reveals Pleistocene divergence and subsequent secondary contact of two genetic lineages of the tropical rainforest tree species Shorea leprosula (Dipterocarpaceae) in South‐East Asia
Nuclear and chloroplast DNA phylogeography reveals Pleistocene divergence and subsequent secondary contact of two genetic lineages of the tropical rainforest tree species Shorea leprosula (Dipterocarpaceae) in South‐East Asia
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DOI：
10.1111/mec.12243
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发表时间：
2013-04
影响因子：
4.9
通讯作者：
M. Ohtani;T. Kondo;N. Tani;S. Ueno;L. S. Lee;K. Ng;N. Muhammad;R. Finkeldey;M. Na’iem;S. Indrioko;K. Kamiya;K. Harada;B. Diway;Eyen Khoo;K. Kawamura;Y. Tsumura
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作者：
M. Ohtani;T. Kondo;N. Tani;S. Ueno;L. S. Lee;K. Ng;N. Muhammad;R. Finkeldey;M. Na’iem;S. Indrioko;K. Kamiya;K. Harada;B. Diway;Eyen Khoo;K. Kawamura;Y. Tsumura
东南亚的热带雨林在过去的冰河时期受到气候波动的影响。为了研究伴随的土地面积和温度变化如何影响该地区雨林树木的遗传特性，我们研究了一种广泛分布的双重果果物种——麻风树的系统地理格局。使用两种类型的DNA标记：基于表达序列标签的简单序列重复和叶绿体DNA （cpDNA）序列变异。这两组标记显示了婆罗洲种群与马来半岛和苏门答腊（马来/苏门答腊）种群之间明显的遗传分化。然而，在婆罗洲西南部，在两种标记类型中观察到谱系的遗传混合。基于cpDNA序列变异的聚结模拟表明，这两个谱系在距今28 - 9万年之前就已经出现了，从马来/苏门答腊到婆罗洲的分化迁移大大超过了相反方向的迁移。我们认为麻风菌的遗传结构主要形成于中更新世，并在随后的东迁过程中经过了巽他陆架的改造。
Tropical rainforests in South‐East Asia have been affected by climatic fluctuations during past glacial eras. To examine how the accompanying changes in land areas and temperature have affected the genetic properties of rainforest trees in the region, we investigated the phylogeographic patterns of a widespread dipterocarp species, Shorea leprosula. Two types of DNA markers were used: expressed sequence tag‐based simple sequence repeats and chloroplast DNA (cpDNA) sequence variations. Both sets of markers revealed clear genetic differentiation between populations in Borneo and those in the Malay Peninsula and Sumatra (Malay/Sumatra). However, in the south‐western part of Borneo, genetic admixture of the lineages was observed in the two marker types. Coalescent simulation based on cpDNA sequence variation suggested that the two lineages arose 0.28–0.09 million years before present and that following their divergence migration from Malay/Sumatra to Borneo strongly exceeded migration in the opposite direction. We conclude that the genetic structure of S. leprosula was largely formed during the middle Pleistocene and was subsequently modified by eastward migration across the subaerially exposed Sunda Shelf.