Unknown

Dataset Information

0

A genomic timescale for placental mammal evolution.


ABSTRACT: 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.

SUBMITTER: Foley NM 

PROVIDER: S-EPMC10233747 | biostudies-literature | 2023 Apr

REPOSITORIES: biostudies-literature

altmetric image

Publications


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 ana  ...[more]

Similar Datasets

| S-EPMC8327908 | biostudies-literature
| S-EPMC7617171 | biostudies-literature
| S-EPMC6029115 | biostudies-literature
| S-EPMC2249597 | biostudies-literature
| S-EPMC1832088 | biostudies-literature
| S-EPMC1942079 | biostudies-literature
| S-EPMC7280037 | biostudies-literature
| S-EPMC298725 | biostudies-literature
| S-EPMC5877938 | biostudies-literature
| S-EPMC533871 | biostudies-literature