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DNA barcoding reveal patterns of species diversity among northwestern Pacific molluscs
Sun, S.; Li, Q.; Kong, L.; Yu, H.; Zheng, X.; Yu, H.; Dai, L.; Sun, Y.; Chen, J.; Liu, J.; Ni, L.; Feng, Y.; Yu, Z.; Zou, S.; Lin, J. (2016). DNA barcoding reveal patterns of species diversity among northwestern Pacific molluscs. NPG Scientific Reports 6(33367 ): 17 pp. http://dx.doi.org/10.1038/srep33367
In: Scientific Reports (Nature Publishing Group). Nature Publishing Group: London. ISSN 2045-2322; e-ISSN 2045-2322
|   |
| Auteurs | | Top |
- Sun, S.
- Li, Q.
- Kong, L.
- Yu, H.
- Zheng, X.
|
- Yu, H.
- Dai, L.
- Sun, Y.
- Chen, J.
- Liu, J.
|
- Ni, L.
- Feng, Y.
- Yu, Z.
- Zou, S.
- Lin, J.
|
| Abstract |
This study represents the first comprehensive molecular assessment of northwestern Pacific molluscs. In total, 2801 DNA barcodes belonging to 569 species from China, Japan and Korea were analyzed. An overlap between intra- and interspecific genetic distances was present in 71 species. We tested the efficacy of this library by simulating a sequence-based specimen identification scenario using Best Match (BM), Best Close Match (BCM) and All Species Barcode (ASB) criteria with three threshold values. BM approach returned 89.15% true identifications (95.27% when excluding singletons). The highest success rate of congruent identifications was obtained with BCM at 0.053 threshold. The analysis of our barcode library together with public data resulted in 582 Barcode Index Numbers (BINs), 72.2% of which was found to be concordantly with morphology-based identifications. The discrepancies were divided in two groups: sequences from different species clustered in a single BIN and conspecific sequences divided in one more BINs. In Neighbour-Joining phenogram, 2,320 (83.0%) queries fromed 355 (62.4%) species-specific barcode clusters allowing their successful identification. 33 species showed paraphyletic and haplotype sharing. 62 cases are represented by deeply diverged lineages. This study suggest an increased species diversity in this region, highlighting taxonomic revision and conservation strategy for the cryptic complexes. |
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