Slow Mitochondrial COI Sequence Evolution at the Base of the Metazoan Tree and Its Implications for DNA Barcoding

The evolution rates of mtDNA in early metazoans hold important implications for DNA barcoding. Here, we present a comprehensive analysis of intra- and interspecific COI variabilities in Porifera and Cnidaria (separately as Anthozoa, Hydrozoa, and Scyphozoa) using a data set of 619 sequences from 224...

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Vydáno v:	Journal of molecular evolution Ročník 66; číslo 2; s. 167 - 174
Hlavní autoři:	Huang, Danwei, Meier, Rudolf, Todd, Peter A, Chou, Loke Ming
Médium:	Journal Article
Jazyk:	angličtina
Vydáno:	New York New York : Springer-Verlag 01.02.2008 Springer-Verlag Springer Nature B.V
Témata:	Animal Genetics and Genomics Animals Anthozoa Base Sequence Bilateria Biological evolution Biomedical and Life Sciences Cell Biology Cnidaria Cnidaria - genetics Deoxyribonucleic acid Divergence DNA DNA barcoding DNA, Mitochondrial - genetics Electron Transport Complex IV - genetics Electronic Data Processing - methods Evolution Evolution, Molecular Evolutionary Biology Fungi Gene sequencing Genetic Variation Genomics Hydrozoa Interspecific Life Sciences Medusozoa Metazoa Microbiology Mitochondria Mitochondria - enzymology Mitochondria - genetics Mitochondrial DNA Molecular biology Molecular Sequence Data Plant Genetics and Genomics Plant Sciences Porifera Porifera - genetics Scyphozoa Species Specificity Success Identification Success Rate Interspecific Variability Intraspecific Distance Interspecific Distance Taxon Coverage
ISSN:	0022-2844, 1432-1432
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Shrnutí:	The evolution rates of mtDNA in early metazoans hold important implications for DNA barcoding. Here, we present a comprehensive analysis of intra- and interspecific COI variabilities in Porifera and Cnidaria (separately as Anthozoa, Hydrozoa, and Scyphozoa) using a data set of 619 sequences from 224 species. We found variation within and between species to be much lower in Porifera and Anthozoa compared to Medusozoa (Hydrozoa and Scyphozoa), which has divergences similar to typical metazoans. Given that recent evidence has shown that fungi also exhibit limited COI divergence, slow-evolving mtDNA is likely to be plesiomorphic for the Metazoa. Higher rates of evolution could have originated independently in Medusozoa and Bilateria or been acquired in the Cnidaria + Bilateria clade and lost in the Anthozoa. Low identification success and substantial overlap between intra- and interspecific COI distances render the Anthozoa unsuitable for DNA barcoding. Caution is also advised for Porifera and Hydrozoa because of relatively low identification success rates as even threshold divergence that maximizes the “barcoding gap” does not improve identification success.
Bibliografie:	http://dx.doi.org/10.1007/s00239-008-9069-5 ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 14 content type line 23
ISSN:	0022-2844 1432-1432
DOI:	10.1007/s00239-008-9069-5