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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Bibliographic Details
Published in:Journal of molecular evolution Vol. 66; no. 2; pp. 167 - 174
Main Authors: Huang, Danwei, Meier, Rudolf, Todd, Peter A, Chou, Loke Ming
Format: Journal Article
Language:English
Published: New York New York : Springer-Verlag 01.02.2008
Springer-Verlag
Springer Nature B.V
Subjects:
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
Online Access:Get full text
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Summary: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.
Bibliography:http://dx.doi.org/10.1007/s00239-008-9069-5
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ISSN:0022-2844
1432-1432
DOI:10.1007/s00239-008-9069-5