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Missing something? Codon aversion as a new character system in phylogenetics
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DOI：10.1111/cla.12183.png)
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Although many studies have documented codon usage bias in different species, the importance of codon usage in a phylogenetic framework remains largely unknown. We demonstrate that a phylogenetic signal is present in the codon usage and non-usage biases of 17 717 orthologues evaluated across 72 tetrapod species using a simple parsimony analysis of a binary matrix of codon characters. Phylogenies estimated using stop codons were more congruent with previous hypotheses than phylogenies based on any other single codon or a combination of codons. Although each codon is present in every species, specific genes have different codon preferences and may or may not use every possible codon. This observation allowed us to map the pattern of codon usage and non-usage across the topology. These results suggest that codon usage is phylogenetically conserved across shallow and deep levels within tetrapods. (C) The Willi Hennig Society 2017.
Keyword:
TREE SHREWS
USAGE
BIAS
SELECTION
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