Genetic diversity of rare and endangered plant Sorbus amabilis

Abstract

Abstract: The genetic diversity of 13 natural populations of Sorbus amabilis Cheng ex Y? from different distribution regions was investigated using RAPD.Fourteen primers were screened from 40 ten bp arbitrary primers,and a total of 105 DNA fragments were amplified,among which,30(28.6%) were polymorphic. DNA molecular dendrograms were established for the 13 natural populations,based on UPGMA and Neighbor Joining.The result showed that S.amabilis had a low genetic diversity,and its adaptability to environmental change was weak.The genetic diversity of S.amabilis among the 13 natural populations were primarily related to their geographic distribution.Its special evolutionary history,man made destruction,natural disaster (fire,plant diseases and insect pests etc.) and genetic drift caused by small population were the main reasons for the low level genetic diversity of S.amabilis and its endangered position.

CLC Number:

Q943

LIU Dengyi, SHEN Hao, YANG Yuehong, ZHANG Jie . Genetic diversity of rare and endangered plant Sorbus amabilis[J]. Chinese Journal of Applied Ecology, 2003, (12): 2141-2144.

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