A genomic timescale for placental mammal evolution

• 成果类型: Article
• 署名作者: Foley, Nicole M.; Mason, Victor C.; Harris, Andrew J.; Bredemeyer, Kevin R.; Damas, Joana; Lewin, Harris A.; Eizirik, Eduardo; Gatesy, John; Karlsson, Elinor K.; Lindblad-Toh, Kerstin; Zoonomia Consortium, Zoonomia Consortium; Springer, Mark S.; Murphy, William J.
• 署名单位: Texas A&M University System; Texas A&M University College Station; University of Bern; Texas A&M University System; Texas A&M University College Station; University of California System; University of California Davis; University of California System; University of California Davis; Pontificia Universidade Catolica Do Rio Grande Do Sul; American Museum of Natural History (AMNH); University of Massachusetts System; UMass Chan Medical School; University of Massachusetts Worcester; Harvard University; Massachusetts Institute of Technology (MIT); Broad Institute; University of Massachusetts System; UMass Chan Medical School; University of Massachusetts Worcester; Uppsala University; University of California System; University of California Riverside
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-13922
• DOI: 10.1126/science.abl8189
• 发表日期: 2023-04-28
• 页码: 365-+
• 关键词: phylogenetic analysis; radiation; diversification; biogeography; RESOLUTION; reveals; TREE

摘要

The precise pattern and timing of speciation events that gave rise to all living placental mammals remain controversial. We provide a comprehensive phylogenetic analysis of genetic variation across an alignment of 241 placental mammal genome assemblies, addressing prior concerns regarding limited genomic sampling across species. We compared neutral genome-wide phylogenomic signals using concatenation and coalescent-based approaches, interrogated phylogenetic variation across chromosomes, and analyzed extensive catalogs of structural variants. Interordinal relationships exhibit relatively low rates of phylogenomic conflict across diverse datasets and analytical methods. Conversely, X-chromosome versus autosome conflicts characterize multiple independent clades that radiated during the Cenozoic. Genomic time trees reveal an accumulation of cladogenic events before and immediately after the Cretaceous-Paleogene (K-Pg) boundary, implying important roles for Cretaceous continental vicariance and the K-Pg extinction in the placental radiation.