Phylogenomics of the adaptive radiation of Triturus newts supports gradual ecological niche expansion towards an incrementally aquatic lifestyle
Autor: | Ben Wielstra, Evan McCartney-Melstad, Howard Bradley Shaffer, Roger K. Butlin, Jan W. Arntzen |
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Jazyk: | angličtina |
Rok vydání: | 2019 |
Předmět: |
Morphology
Sequence capture 0106 biological sciences 0301 basic medicine Aquatic Organisms Target enrichment 010603 evolutionary biology 01 natural sciences 03 medical and health sciences Species Specificity Phylogenetics Systematics Phylogenomics Adaptive radiation Genetics Animals 14. Life underwater Molecular Biology Ecosystem Phylogeny Ecology Evolution Behavior and Systematics Coevolution 030304 developmental biology Ecological niche 0303 health sciences Geography biology Phylogenetic tree Gene tree Genomics biology.organism_classification Triturus 030104 developmental biology Cladogenesis Evolutionary biology embryonic structures Transcriptome |
Zdroj: | Molecular Phylogenetics and Evolution Molecular Phylogenetics and Evolution, 133, 120-127 |
ISSN: | 1055-7903 |
Popis: | Newts of the genusTriturus(marbled and crested newts) exhibit substantial variation in the number of trunk vertebrae (NTV) and a higher NTV corresponds to a longer annual aquatic period. Because theTriturusphylogeny has thwarted resolution to date, the evolutionary history of NTV, annual aquatic period, and their potential coevolution has remained unclear. To resolve the phylogeny ofTriturus, we generated a c. 6,000 transcriptome-derived marker data set using a custom target enrichment probe set, and conducted phylogenetic analyses using: 1) data concatenation with RAxML, 2) gene-tree summary with ASTRAL, and 3) species-tree estimation with SNAPP. All analyses produce the same, highly supported topology, despite cladogenesis having occurred over a short timeframe, resulting in short internal branch lengths. Our new phylogenetic hypothesis is consistent with the minimal number of inferred changes in NTV count necessary to explain the diversity in NTV observed today. Although a causal relationship between NTV, body form, and aquatic ecology has yet to be experimentally established, our phylogeny indicates that these features have evolved together, and suggest that they may underlie the adaptive radiation that characterizesTriturus. |
Databáze: | OpenAIRE |
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