Details

Autor(en) / Beteiligte

• 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
• Springer, Mark S
• Murphy, William J

Titel

A genomic timescale for placental mammal evolution

Ist Teil von

• Science (American Association for the Advancement of Science), 2023-04, Vol.380 (6643), p.eabl8189-eabl8189

Ort / Verlag

United States: The American Association for the Advancement of Science

Erscheinungsjahr

2023

Link zum Volltext

Quelle

Science Online_科学在线

Beschreibungen/Notizen

• 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.