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| Genetic variations of the greater long-tailed hamster among several local |
| XIE Jiayan,ZHANG Zhibin1 |
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Abstract The genetic divergence among 7 local populations of the greater long-tailed hamster (Tscherskia triton） in North China was analysed by using random amplified polymorphic DNA（RAPD）markers. Sampling localities were Miyun Taishitun，Beijing；Miyun Jianchangcun，Beijing；Shunyi，Beijing；Mentougou，Beijing ；Gu'an，Hebei Province；Raoyang，Heibei Province；Taikang，Henan Province. The populations of the greater long-tailed hamster showed a comparatively high genetic diversity. Among those local populations，the percentage of polymorphic loci（P）was above 60%，Nei's gene diversity（H）varied from 0.204 to 0.326，Shannon index（I）from 0.306 to 0.484. The result of Gst showed that the total genetic variation among local populations was 30.9%. It is suggested that limited gene flow among those local populations，plus the impact of genetic drift，played an important role in shaping the populations genetic differentiation of the greater long-tailed hamster.
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