Abstract
Background
In nucleotide public repositories, studies discovered data errors which resulted in incorrect species identification of several accipitrid raptors considered for conservation. Mislabeling, particularly in cases of cryptic species complexes and closely related species, which were identified based on morphological characteristics, was discovered. Prioritizing accurate species labeling, morphological taxonomy, and voucher documentation is crucial to rectify spurious data.
Objective
Our study aimed to identify an effective DNA barcoding tool that accurately reflects the efficiency status of barcodes in raptor species (Accipitridae).
Methods
Barcode sequences, including 889 sequences from the mitochondrial cytochrome c oxidase I (COI) gene and 1052 sequences from cytochrome b (Cytb), from 150 raptor species within the Accipitridae family were analyzed.
Results
The highest percentage of intraspecific nearest neighbors from the nearest neighbor test was 88.05% for COI and 95.00% for Cytb, suggesting that the Cytb gene is a more suitable marker for accurately identifying raptor species and can serve as a standard region for DNA barcoding. In both datasets, a positive barcoding gap representing the difference between inter-and intra-specific sequence divergences was observed. For COI and Cytb, the cut-off score sequence divergences for species identification were 4.00% and 3.00%, respectively.
Conclusion
Greater accuracy was demonstrated for the Cytb gene, making it the preferred primary DNA barcoding marker for raptors.
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Data availability
The full dataset and metadata used in this study are available from the Dryad Digital Repository. Data set: https://datadryad.org/stash/share/XofELd3yZewjORV3D5DvZrRVK92ZkaGasj10bl7Pw9I
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Acknowledgements
We wish to thank the public data repository for supplying accession numbers to the raptors. We also wish to thank the Faculty of Veterinary Medicine and the Faculty of Science, Kasetsart University and the Center for Bio-Medical Engineering Core Facility, Dankook University for providing supporting research facilities. This research was financially supported in part by the Graduate grants scholarship of the Faculty of Science, Kasetsart University (6417400239) grant awarded to JS, a Thailand Science Research and Innovation grant through the Kasetsart University Reinventing University Program 2021 (3/2564) awarded to TP and KS, the High-Quality Research Graduate Development Cooperation Project between Kasetsart University and the National Science and Technology Development Agency awarded to TP and KS, and the Higher Education for Industry Consortium (Hi-FI) (6514400931 and 6414400777) awarded to WJ and NA.
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Contributions
Conceptualization: WJ, JS, and KS. Data curation: WJ, JS, TP, and KS. Formal analysis: WJ, JS, TP, PW, NA, WS, SFA, and KS. Funding acquisition: KS. Investigation: WJ and JS. Methodology: WJ, JS, TP, and KS. Project administration: KS. Visualization: NM, PD, CK, and KS. Writing—original draft: WJ, JS, and KS. Writing—review and editing: WJ, JS, TP, PW, NA, TT, WS, SFA, EK, NM, KH, AA, RS, AK, PD, CK, and KS. All authors have read and agreed to the published version of the manuscript.
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The authors declare no competing financial interests or personal relationships that influenced this study.
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All animal care and experimental procedures were approved by the Animal Experiment Committee of Kasetsart University, Thailand (Approval No. ACKU64-VET-002 and ACKU64-VET-052) and conducted in accordance with the Regulations on Animal Experiments at Kasetsart University.
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Supplementary Information
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Supplementary Fig. 1
A cladogram clarifying the phylogenetic relationships among the 889 GenBank accessions was constructed from a Bayesian inference analysis using mitochondrial cytochrome c oxidase I (COI) sequences. The bPTP model highlights species with an orange hue, the GMYC model with green, and overlap** indications are represented in black (DOCX 300 KB)
Supplementary Fig. 2
A cladogram clarifying the phylogenetic relationships among the 1,062 GenBank accessions was constructed from a Bayesian inference analysis using mitochondrial cytochrome b (Cytb) sequences. The bPTP model highlights species with an orange hue, the GMYC model with green, and overlap** indications are represented in black (DOCX 276 KB)
Supplementary Fig. 3
A cladogram clarifying the phylogenetic relationships among the collected sample sequences from eight species was constructed from a Bayesian inference analysis using cytochrome c oxidase I (COI) sequences. The common kestrel (Falco tinnunculus) was identified as an outgroup (DOCX 123 KB)
Supplementary Fig. 4
A cladogram clarifying the phylogenetic relationships among the collected sample sequences from eight species was constructed from a Bayesian inference analysis using mitochondrial cytochrome b (Cytb) sequences. The common kestrel (Falco tinnunculus) was identified as an outgroup (DOCX 124 KB)
Supplementary Fig. 5
A cladogram clarifying the phylogenetic relationships among the 889 GenBank accessions was constructed from the Bayesian inference analysis using mitochondrial cytochrome c oxidase I (COI) sequences. Group 1: higher-level similarity with the same species. Group 2: higher-level similarity with multiple species. Group 3: unique sequences with no similarity within most sequences. Class 1: sequences with the same species name exhibiting intraspecific cohesive clustering and interspecific distinct clustering with high posterior probability (0.90–1.00). Class 2: sequences with the same species name that do not exhibit intraspecific cohesive clustering. Class 3: sequences with a different species name exhibiting cohesive clustering (DOCX 298 KB)
Supplementary Fig. 6
A cladogram clarifying the phylogenetic relationships among the 1062 GenBank accessions was constructed from Bayesian inference analysis using mitochondrial cytochrome b (Cytb) sequences. Group 1: higher-level similarity with the same species. Group 2: higher-level similarity with multiple species. Group 3: unique sequences with no similarity within most sequences. Class 1: sequences with the same species name exhibiting intraspecific cohesive clustering and interspecific distinct clustering with high posterior probability (0.90–1.00). Class 2: sequences with the same species name that do not exhibit intraspecific cohesive clustering. Class 3: sequences with a different species name exhibiting cohesive clustering (DOCX 251 KB)
Supplementary Fig. 7
A cladogram clarifying the phylogenetic relationships among the eight species from collected samples were constructed from Bayesian inference analysis using mitochondrial cytochrome c oxidase I (COI) sequences. The common kestrel (Falco tinnunculus) was identified as an outgroup. Group 1: higher-level similarity with the same species. Class 1: sequences with the same species name exhibiting intraspecific cohesive clustering and interspecific distinct clustering with high posterior probability (0.90–1.00) (DOCX 113 KB)
Supplementary Fig. 8
A cladogram clarifying the phylogenetic relationships among the collected sample sequences eight species was constructed from Bayesian inference analysis using mitochondrial cytochrome b (Cytb) sequences. The common kestrel (Falco tinnunculus) was identified as an outgroup. Group 1: higher-level similarity with the same species. Class 1: sequences with the same species name exhibiting intraspecific cohesive clustering and interspecific distinct clustering with high posterior probability (0.90–1.00) (DOCX 121 KB)
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Jaito, W., Sonongbua, J., Panthum, T. et al. Disclosing the hidden nucleotide sequences: a journey into DNA barcoding of raptor species in public repositories. Genes Genom 46, 95–112 (2024). https://doi.org/10.1007/s13258-023-01462-x
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DOI: https://doi.org/10.1007/s13258-023-01462-x