Subpopulation genetic structure of a plant panmictic population of Castanea sequinii as revealed by microsatellite markers

作     者：WANG Ying KANG Ming HUANG Hongwen 

作者机构：Wuhan Botanical GardenChinese Academy of SciencesWuhan 430074China Graduate School of the Chinese Academy of ScienceBeijing 100039China 

出 版 物：《Frontiers in Biology》 (生物学前沿（英文版）)

年 卷 期：2007年第2卷第2期

页      面：187-195页

核心收录：

学科分类：0710[理学-生物学] 0831[工学-生物医学工程（可授工学、理学、医学学位）] 070904[理学-构造地质学] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 0709[理学-地质学] 1001[医学-基础医学(可授医学、理学学位)] 07[理学] 0836[工学-生物工程] 0713[理学-生态学] 

基　　金：This work was supported by KIP Pilot of Chinese Academy of Sciences(No.KSXC2-SW-104) the National Natural Science Foundation of China(Grant No.30470185) 

主　　题：Castanea sequinii genetic diversity genetic structure microsatellite panmictic population spatial autocorrelation 

摘      要：Castanea squinii Dode,an endemic tree widely distributed in China,plays an important role both in chestnut breeding and forest ecosystem *** spatial genetic structure within and among populations is an important part of the evolutionary and ecological genetic dynamics of natural populations,and can provide insights into effective conservation of genetic *** the present study,the spatial genetic structure of a panmictic natural population of *** in the Dabie Mountain region was investigated using microsatellite *** prescreened microsatellite loci generated 29-33 alleles each,and were used for spatial autocorrelation *** on Moran’s I coefficient,a panmictic population of *** in the Dabie Mountain region was found to be lacking a spatial genetic *** results suggest that a high pollen-mediated gene flow among subpopulations counteract genetic drift and/or genetic differentiation and plays an important role in maintaining a random and panmictic population structure in *** ***,a spatial genetic structure was detected in each subpopulation’s scale(0.228 km),with all three subpopulations showing significant fine-scale *** genetic variation was found to be nonrandomly distributed within 61 m in each subpopulation(Moran’s I positive values).Although Moran’s I values varied among the different subpopulations,Moran’s I in all the three subpopulations reached the expected values with an increase in distances,suggesting a generally patchy distribution in the *** fine-scale structure seems to reflect restricted seed dispersal and microenvironment selection in *** results have important implications for understanding the evolutionary history and ecological process of the natural population of *** and provide baseline data for formulating a conservation strategy of Castanea species.