Global versus Chinese perspectives on the phylogeny of the N‐fixing clade
Global versus Chinese perspectives on the phylogeny of the N‐fixing clade
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DOI：
10.1111/jse.12201
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发表时间：
2016-07
影响因子：
3.7
通讯作者：
Hong‐Lei Li;Wei Wang;Rui‐Qi Li;Jing-Bo Zhang;Miao-miao Sun;R. Naeem;Junyan Su;X. Xiang;P. Mortimer;De-Zhu Li;K. Hyde;Jian-chu Xu;D. Soltis;P. Soltis;Jianhua Li;Shouzhou Zhang;Hong Wu;Zhiduan Chen;An‐ming Lu
中科院分区：
文献类型：
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作者：
Hong‐Lei Li;Wei Wang;Rui‐Qi Li;Jing-Bo Zhang;Miao-miao Sun;R. Naeem;Junyan Su;X. Xiang;P. Mortimer;De-Zhu Li;K. Hyde;Jian-chu Xu;D. Soltis;P. Soltis;Jianhua Li;Shouzhou Zhang;Hong Wu;Zhiduan Chen;An‐ming Lu
在生态学研究中，将区域性的生命树与群落聚集规则相结合已引起越来越多的关注。这就提出了问题的影响，在区域与全球尺度上的拓扑结构的分类单元采样策略。为了解决这一问题，我们构建了两个固氮分支树：（i）包括1023属的属级全球树;（ii）包括303属的区域树，分类单元采样仅限于中国。我们使用超矩阵方法，并对matK、rbcL和trnL-F质体序列进行了最大似然分析。我们发现，N固定分支的全局树和区域树的拓扑结构通常是一致的。然而，虽然与全球树获得的四个订单之间的关系同意与接受的拓扑结构中获得更多的基因集中分析，区域拓扑结构获得不同的关系，虽然弱支持。在一个更细的尺度上，家庭杨梅科的系统发育位置被发现是敏感的采样密度。我们预计，在整个系统发育的内部支持，可以提高与密集的分类群采样。分类单元取样方法（全球与区域）对固氮进化枝的细级分支模式没有重大影响。因此，在这种情况下，在区域尺度上具有相对密集的分类单元采样策略的良好解析的系统发育似乎是整体系统发育模式的良好代表，并且可以用于生态学研究。否则，区域树应根据相应的可靠全局树进行调整。
There has been increasing interest in integrating a regional tree of life with community assembly rules in the ecological research. This raises questions regarding the impacts of taxon sampling strategies at the regional versus global scales on the topology. To address this concern, we constructed two trees for the nitrogen‐fixing clade: (i) a genus‐level global tree including 1023 genera; and (ii) a regional tree comprising 303 genera, with taxon sampling limited to China. We used the supermatrix approach and performed maximum likelihood analyses on combined matK, rbcL, and trnL‐F plastid sequences. We found that the topology of the global and the regional tree of the N‐fixing clade were generally congruent. However, whereas relationships among the four orders obtained with the global tree agreed with the accepted topology obtained in focused analyses with more genes, the regional topology obtained different relationships, albeit weakly supported. At a finer scale, the phylogenetic position of the family Myricaceae was found to be sensitive to sampling density. We expect that internal support throughout the phylogeny could be improved with denser taxon sampling. The taxon sampling approach (global vs. regional) did not have a major impact on fine‐level branching patterns of the N‐fixing clade. Thus, a well‐resolved phylogeny with relatively dense taxon sampling strategy at the regional scale appears, in this case, to be a good representation of the overall phylogenetic pattern and could be used in ecological research. Otherwise, the regional tree should be adjusted according to the correspondingly reliable global tree.