Abstract
Mitochondrial DNA (mtDNA), especially the gene for cytochrome b (MT-CYB), has been found to be highly informative for species identification. In this study, we present the results of the analysis of a 127 bp long fragment of MT-CYB, amplified using universal primers, variable enough to be used for species identification and discrimination, even in highly degraded animal samples. The total number of analyzed species in this study was 30, including 17 mammalian and 13 bird species. Using a newly created primer pair, we successfully amplified and sequenced the target sequence in almost all tested species. The amplification was incomplete in just two species, and as a result, partial, but still variable sequences, were obtained. Using the target fragment we successfully identified all tested samples. Initial results suggested that the intraspecies genetic diversity of the target region, in all tested species, was low – from 0 to 4.72%. The interspecies genetic diversity of the target region, crucial for successful discrimination, showed relatively high diversity, ranging from 8.36% to 42.52%. Given its short length, the target region should be used for species determination, particularly in samples that are degraded or are low in DNA quantity.
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Acknowledgements
The authors would like to express their gratitude to colleagues from a private DNA Center for Genetics laboratory in Belgrade, and colleagues from the University of Belgrade Faculty of Biology, for providing the samples.
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All procedures performed in this study were in accordance with the ethical standards of the Serbian national research committee and with the 1964 Helsinki declaration and its later amendments. The study was approved by authorities of Faculty of Biology at the University of Belgrade.
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Andrejevic, M., Markovic, M.K., Bursac, B. et al. Identification of a broad spectrum of mammalian and avian species using the short fragment of the mitochondrially encoded cytochrome b gene. Forensic Sci Med Pathol 15, 169–177 (2019). https://doi.org/10.1007/s12024-019-00096-4
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DOI: https://doi.org/10.1007/s12024-019-00096-4