Comparative analysis of genetic diversity and population genetic structure in Abies chensiensis and Abies fargesii inferred from microsatellite markers |
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| Institution: | 1. College of Life Sciences, Shaanxi Normal University, Xi''an 710062, China;2. National Engineering Laboratory for Resource Developing of Endangered Chinese Crude Drugs in Northwest of China, Xi''an, Shaanxi 710062, China;3. Meteorological Bureau of Shaanxi Province, Xi''an 710014, China;1. State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou 311300, China;1. National Engineering Laboratory for Resource Developing of Endangered Chinese Crude Drugs in Northwest of China, College of Life Sciences, Shaanxi Normal University, Xi''an, 710062, China;2. Core Research Laboratory, the Second Affiliated Hospital, School of Medicine, Xi''an Jiaotong University, Xi''an, 710004, China;3. Climate Research Center, Meteorological Bureau of Shaanxi Province, Xi''an, 710014, China |
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| Abstract: | Abies chensiensis Tieghem and Abies fargesii Franchet are two closely related tree species of Pinaceae endemic to China. A. chensiensis is usually found scattered in small forest fragments, whereas A. fargesii is a dominant member of coniferous forest. To evaluate the genetic effect of fragmentation on A. chensiensis, a total of 24 populations were sampled from the whole distribution of the two species. Seven nuclear microsatellite loci were employed to analyze comparatively the genetic diversity and population genetic differentiation. Both A. chensiensis and A. fargesii have high level within-population genetic diversity and low inter-population genetic differentiation. Low microsatellite differentiation (2.1%) between A. fargesii and A. chensiensis was observed. But microsatellite marker was able to discriminate most populations of these two species. Compared to A. fargesii, A. chensiensi has lower allelic diversity and higher genetic differentiation among populations. It suggested the existence of negative genetic impacts of habitat fragmentation on A. chensiensis. |
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| Keywords: | Genetic diversity Genetic differentiation Microsatellite |
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