Neogene and Quaternary climate changes shaped the lineage differentiation and demographic history of Fokienia hodginsii (Cupressaceae s.l.), a Tertiary relict in East Asia
Neogene and Quaternary climate changes shaped the lineage differentiation and demographic history of Fokienia hodginsii (Cupressaceae s.l.), a Tertiary relict in East Asia
复制标题
新近纪和第四纪的气候变化塑造了东亚第三纪遗迹福建柏（Cupressaceae s.l.）的谱系分化和人口历史
DOI：
10.1111/jse.12582
复制
发表时间：
--
影响因子：
3.7
通讯作者：
Liao Wen-Bo
中科院分区：
文献类型：
--
作者：
Yin Qian-Yi;Fan Qiang;Li Pan;Truong DoVan;Zhao Wan-Yi;Zhou Ren-Chao;Chen Su-Fang;Liao Wen-Bo
历史上的气候振荡和构造事件影响了许多生物的物种形成和进化历史。本研究以福建柏Fokienia hodginsii（Dunn）A.亨利& H. H.托马斯（柏科），第三纪残存针叶树，用于推断新近纪以来的人口历史。对来自28个种群的497个个体的5个叶绿体区域和2个单拷贝核基因进行了扩增和测序。叶绿体数据表明，F.群体遗传多样性水平较高（HT = 0.860 ± 0.0279），地理结构显著（N ST > G ST，P < 0.05）。根据叶绿体和细胞核数据构建的系统发育图，两个主要谱系的分歧时间可以追溯到中新世早期（约1000年）。19.34-19.95 Ma），这与亚洲季风的爆发和加强相吻合。在此期间，田中线两侧不同气候条件下的环境适应可能在维持和/或加强两个主要谱系的分歧方面发挥了重要作用。生态位模拟结果表明，F. hodginsii经历了栖息地破碎化和加强遗传障碍在末次盛冰期，随后在冰后期的局部扩张。我们的研究结果表明，新第三纪以来的古气候变化可能引发了所有的福建柏物种，但一个灭绝和种内谱系分化。本研究还表明，亚热带和热带地区的第三纪孑遗可能具有复杂的演化历史，其种内分化时间可能比预期的要早。
Historical climate oscillations and tectonic events have influenced the speciation and evolutionary history of many organisms. In this study, we chose Fokienia hodginsii (Dunn) A. Henry & H. H. Thomas (Cupressaceae s.l.), a Tertiary relict conifer, for the inference of the demographic history since the Neogene. Five chloroplast regions and two single‐copy nuclear genes were amplified and sequenced in 497 individuals from 28 populations. The chloroplast data showed that F. hodginsii presented a high level of genetic diversity (H T = 0.860 ± 0.0279) and significant phylogeographic structure (N ST > G ST , P < 0.05). According tobeast analysis, the divergence time of the two major lineages indicated by the phylogenetic construction produced from chloroplast and nuclear data could be dated to the early Miocene (ca. 19.34–19.95 Ma), which coincided with the onset and intensification of the Asian monsoon. During this time, environmental adaption under the different climatic conditions on either side of the Tanaka Line could have played important roles in maintaining and/or reinforcing the divergence of the two major lineages. The ecological niche modeling results showed that F. hodginsii experienced habitat fragmentation and strengthening of genetic barriers during the Last Glacial Maximum, followed by local expansion during postglacial periods. Our findings show that paleoclimate changes since the Neogene might have triggered the extinction of all but one Fokienia species and its intraspecific lineage differentiation. This study also suggests that Tertiary relicts in subtropical and tropical areas might have had a complex evolutionary history and their intraspecific differentiation time might have been earlier than expected.