Mitochondrial Divergence between Western and Eastern Great Bustards: Implications for Conservation and Species Status
| Autor: | Ramona Flatz, Ivan I Vagner, Muyang Wang, Dashnyam Batsuuri, Christopher Irwin Smith, Natsag Galbadrakh, Nyambayar Batbayar, Oleg A. Goroshko, Malia A Santos, Fyodor G Bidashko, Valery V Khrokov, Tuvshin Unenbat, Tseveenmyadag Natsagdorj, Aimee Elizabeth Kessler |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Gene Flow
Male 0301 basic medicine Conservation of Natural Resources Mitochondrial DNA Zoology Subspecies DNA Mitochondrial Coalescent theory Gene flow Birds 03 medical and health sciences Species Specificity Genetics Animals Bustard Molecular Biology Phylogeny Genetics (clinical) mtDNA control region Genetic diversity biology Genetic Variation Cytochromes b Feathers biology.organism_classification Phylogeography 030104 developmental biology Otis tarda Female Biotechnology |
| Zdroj: | Journal of Heredity. 109:641-652 |
| ISSN: | 1465-7333 0022-1503 |
| Popis: | The great bustard is the heaviest bird capable of flight and an iconic species of the Eurasian steppe. Populations of both currently recognized subspecies are highly fragmented and critically small in Asia. We used DNA sequence data from the mitochondrial cytochrome b gene and the mitochondrial control region to estimate the degree of mitochondrial differentiation and rates of female gene flow between the subspecies. We obtained genetic samples from 51 individuals of Otis tarda dybowskii representing multiple populations, including the first samples from Kazakhstan and Mongolia and samples from near the Altai Mountains, the proposed geographic divide between the subspecies, allowing for better characterization of the boundary between the 2 subspecies. We compared these with existing sequence data (n = 66) from Otis tarda tarda. Our results suggest, though do not conclusively prove, that O. t. dybowskii and O. t. tarda may be distinct species. The geographic distribution of haplotypes, phylogenetic analysis, analyses of molecular variance, and coalescent estimation of divergence time and female migration rates indicate that O. t. tarda and O. t. dybowskii are highly differentiated in the mitochondrial genome, have been isolated for approximately 1.4 million years, and exchange much less than 1 female migrant per generation. Our findings indicate that the 2 forms should at least be recognized and managed as separate evolutionary units. Populations in Xinjiang, China and Khövsgöl and Bulgan, Mongolia exhibited the highest levels of genetic diversity and should be prioritized in conservation planning. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|