Resolution of the early placental mammal radiation using Bayesian phylogenetics
Resolution of the early placental mammal radiation using Bayesian phylogenetics
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DOI：
10.1126/science.1067179
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发表时间：
2001-12-14
期刊：
影响因子：
56.9
通讯作者：
Springer, MS
中科院分区：
文献类型：
--
作者：
Murphy, WJ;Eizirik, E;Springer, MS
分子系统发育研究已经解决了胎盘。哺乳动物分为四个主要类群，但尚未建立序间关系的完整层次结构，包括根的位置。后者对于了解胎盘动物的早期地理历史至关重要。我们使用贝叶斯和最大似然方法和16.4-β-淀粉酶分子数据集研究胎盘发生。序数间关系几乎完全解决了。非洲兽亚目和其他胎盘类的基底分裂约在1.03亿年前，可能是由于南美洲和非洲在白垩纪的分离。冠群真兽目可能在南半球（冈瓦纳）有最近的共同祖先。
Molecular phylogenetic studies have resolved placental. mammals into four major groups, but have not established the full hierarchy of interordinal relationships, including the position of the root. The latter is critical for understanding the early biogeographic history of placentals. We investigated placental phylogeny using Bayesian and maximum-likelihood methods and a 16.4-kilobase molecular data set. Interordinal. relationships are almost entirely resolved. The basal split is between Afrotheria and other placentals, at about 103 million years, and may be accounted for by the separation of South America and Africa in the Cretaceous. Crown-group Eutheria may have their most recent common ancestry in the Southern Hemisphere (Gondwana).