Phylotranscriptomics resolves interspecific relationships and indicates multiple historical out-of-North America dispersals through the Bering Land Bridge for the genus Picea (Pinaceae)
Phylotranscriptomics resolves interspecific relationships and indicates multiple historical out-of-North America dispersals through the Bering Land Bridge for the genus Picea (Pinaceae)
复制标题
系统转录组学解决了种间关系，并表明云杉属（松科）历史上曾多次通过白令陆桥向北美以外扩散
DOI：
10.1016/j.ympev.2019.106610
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发表时间：
2019
影响因子：
4.1
通讯作者：
Wang Xiao-Quan
中科院分区：
文献类型：
--
作者：
Shao Cheng-Cheng;Shen Ting-Ting;Jin Wei-Tao;Mao Han-Jie;Ran Jin-Hua;Wang Xiao-Quan
一个健全的系统发育是理解生物进化和生物地理学的先决条件。然而，古代和近代的进化辐射发生在许多植物谱系中，这给系统发育分析带来了巨大的挑战，特别是对于有效种群规模大、世代时间长的针叶树。杉木是北半球暗针叶林的重要组成部分。先前的研究提高了我们对其进化史的理解，但其种间关系和生物地理历史在很大程度上仍未得到解决。在本研究中，我们在一个完整的物种样本的基础上，通过比较转录组学分析重建了一个很好的解决了picee5的系统发育。系统发育分析、分子定年和祖先区域重建进一步支持了云杉属的北美起源假说，并表明该属经过白令海陆桥多次向北美外扩散。我们还发现日本群岛的云杉有多个起源，而p。本研究首次在基因组水平上提供了杉木属植物的完整系统发育，这对今后杉木属植物的研究具有重要意义。
A robust phylogeny is prerequisite to understand the evolution and biogeography of organisms. However, ancient and recent evolutionary radiations occurred in many plant lineages, which pose great challenges for phylogenetic analysis, especially for conifers characterized by large effective population sizes and long generation times.Piceais an important component of the dark coniferous forests in the Northern Hemisphere. Previous studies improved our understanding of its evolutionary history, but its interspecific relationships and biogeographic history remain largely unresolved. In the present study, we reconstructed a well-resolved phylogeny ofPiceaby comparative transcriptomic analysis based on a complete species sampling. The phylogenetic analysis, together with molecular dating and ancestral area reconstruction, further supports the North American origin hypothesis forPicea, and indicates that this genus experienced multiple out-of-North America dispersals by the Bering Land Bridge. We also found that spruces in the Japanese Archipelago have multiple origins, andP. morrisonicolafrom the Taiwan Island has a close relationship with species from the Qinghai-Tibetan Plateau and adjacent regions. Our study provides the first complete phylogeny ofPiceaat the genomic level, which is important for future studies of this genus.