期刊
BIOLOGY LETTERS
卷 8, 期 5, 页码 783-786出版社
ROYAL SOC
DOI: 10.1098/rsbl.2012.0331
关键词
turtles; ultraconserved elements; phylogenomics; evolution; archosaurs
资金
- National Science Foundation [DEB-1119734, DEB-0841729, DEB-0956069]
- Amazon Web Services Education Grant
- Direct For Biological Sciences
- Division Of Environmental Biology [0841729] Funding Source: National Science Foundation
- Div Of Biological Infrastructure
- Direct For Biological Sciences [0956069] Funding Source: National Science Foundation
We present the first genomic-scale analysis addressing the phylogenetic position of turtles, using over 1000 loci from representatives of all major reptile lineages including tuatara. Previously, studies of morphological traits positioned turtles either at the base of the reptile tree or with lizards, snakes and tuatara (lepidosaurs), whereas molecular analyses typically allied turtles with crocodiles and birds (archosaurs). A recent analysis of shared microRNA families found that turtles are more closely related to lepidosaurs. To test this hypothesis with data from many single-copy nuclear loci dispersed throughout the genome, we used sequence capture, high-throughput sequencing and published genomes to obtain sequences from 1145 ultraconserved elements (UCEs) and their variable flanking DNA. The resulting phylogeny provides overwhelming support for the hypothesis that turtles evolved from a common ancestor of birds and crocodilians, rejecting the hypothesized relationship between turtles and lepidosaurs.
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