Population expanding with the phalanx model and lineages split by environmental heterogeneity: a case study of Primula obconica in subtropical China.
Population expanding with the phalanx model and lineages split by environmental heterogeneity: a case study of Primula obconica in subtropical China.
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方阵模型下的种群扩张和环境异质性导致的谱系分裂：以中国亚热带报春花为例
DOI：
10.1371/journal.pone.0041315
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发表时间：
2012
期刊：
影响因子：
3.7
通讯作者：
Hao G
中科院分区：
文献类型：
--
作者：
Yan HF;Zhang CY;Wang FY;Hu CM;Ge XJ;Hao G
背景当前和历史事件都影响了植物的当前分布格局和种内分化。虽然许多研究都集中在青藏高原（QTP），这些事件对中国亚热带植物群的影响仍然知之甚少。亚热带中国以其高度复杂的地形和更新世冰川作用的有限影响而闻名;这可能导致该地区物种的遗传遗产与完全冰川化地区相比有所不同。方法/主要发现我们使用质体和核DNA序列数据和分布模型来分析的分歧模式和人口统计学的历史报春obconica Hance，一个广泛的草本山地种在亚热带中国。系统发育分析显示，两个主要的谱系（谱系A和谱系B），代表一个东西分裂为云南和东部组，四川和中部组，分别。东部和中部组包括相对较新的衍生单倍型。巢式进化枝分析和贝叶斯Skyline Plot分析均表明，倒锥原甲种群主要经历了一个逐渐扩展的过程。此外，模拟的倒锥松在末次盛冰期的分布略大于现在的分布。结论/意义我们的研究结果是第一次确定一个西向东迁移的P. obconica。倒锥松种群的逐渐扩展模式和冷季较大的潜在分布范围表明该种群的扩展符合方阵模型。此外，由于中国亚热带地区存在广泛的环境异质性，目前的遗传分化模式一直存在。
Background Current and historical events have both affected the current distribution patterns and intraspecific divergence of plants. While numerous studies have focused on the Qinghai-Tibetan Plateau (QTP), the impacts of such events on the flora of subtropical China remain poorly understood. Subtropical China is famous for its highly complex topography and the limited impact from glaciation during the Pleistocene; this may have resulted in a different genetic legacy for species in this region compared to fully glaciated areas. Methodology/Principal Findings We used plastid and nuclear DNA sequence data and distribution modeling to analyze the divergence patterns and demographic history of Primula obconica Hance, a widespread herbaceous montane species in subtropical China. The phylogenetic analysis revealed two major lineages (lineage A and lineage B), representing a west-east split into the Yunnan and Eastern groups, and the Sichuan and Central groups, respectively. The Eastern and Central groups comprised relatively new derived haplotypes. Nested Clade Analysis and Bayesian Skyline Plot analyses both indicated that P. obconica mainly experienced a gradual expansion of populations. In addition, the simulated distribution of P. obconica during the Last Glacial Maximum was slightly larger than its present-day distribution. Conclusion/Significance Our results are the first to identify a west-east migration of P. obconica. The gradual expansion pattern and a larger potential distribution range in cold periods detected for P. obconica indicate that the population expansion of this species is consistent with the phalanx model. In addition, the current patterns of genetic differentiation have persisted as a result of the extensive environmental heterogeneity that exists in subtropical China.
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DOI：
10.1111/j.1095-8312.1999.tb01160.x
发表时间：
1999-09-01
影响因子：
1.9
作者：
Hewitt, GM
通讯作者：
Hewitt, GM
影响因子：
4.9
作者：
Clement, M;Posada, D;Crandall, KA
通讯作者：
Crandall, KA
影响因子：
9.8
作者：
Drummond AJ;Ho SY;Phillips MJ;Rambaut A
通讯作者：
Rambaut A
影响因子：
3.3
作者：
DeChaine, EG;Martin, AP
通讯作者：
Martin, AP
影响因子：
2.6
作者：
Excoffier, Laurent;Laval, Guillaume;Schneider, Stefan
通讯作者：
Schneider, Stefan