中文摘要：

用叶绿体微卫星（cpSSR）分子标记研究资源冷杉（Abies ziyuanensis）的遗传变异。资源冷杉分别取样于广西资源县和湖南城步县交界的银竹老山、湖南东安和新宁交界处的舜黄山、湖南炎陵县大院的7个居群。样品采用CTAB法进行总DNA的提取，用6对cpSSR引物进行扩增，扩增产物经95C变性后在6％的变性聚丙烯酰胺凝胶上进行电泳，然后应用POPGEN Version 1．31软件计算资源冷杉各个居群的Nei＇s基因多样性指数（HP），Shannon信息多样性指数（I），基因分化系数（Gst）以及Nei＇s遗传距离。用NTSYSpc Version 2．10软件进行UPGMA聚类分析，并对地理距离和遗传距离相关性进行Mental检验。用ARLEQUIN2．000软件分析地区问、居群问和居群内的遗传变异，统计有效单型模式数量。结果6对epSSR引物中选出3对多态性引物，共扩增出7个位点。Nei＇s基因多样度HP为0．2922，信息多样性指数，为0．4428，基因分化系数Gst为0．5805。资源冷杉的遗传分化主要存在于居群间，分布在银竹老山和舜黄山的资源冷杉与分布在大院的资源冷杉之间产生了明显的遗传分化，两地资源冷杉之间的遗传变异占总的68．87％。

英文摘要：

The genetic variation of Abies ziyuanensis was studied by using chloroplast simple-sequence repeats （cpSSR）markers. The individuals of seven populations of A. ziyuanensis were sampled from Yinzhulaoshan of Guangxi,Shunhuangshan of Hunan and Dayuan of Hunan. Total genomic DNA was extracted using CTAB protocol. The amplification reaction was performed with six pair primers,and the fragments were denaturalized with 95℃ before being loaded and run on a 6% denaturing polyacrylamide gel. The Nei＇s gene diversity （He）, Shannon information index （I）, the coefficient gene differentiation （Gst） and Nei＇s genetic distance were computed by POPGEN Versin 1.31. UPGMA dengrogram was constructed by NTSYSpc Version 2.10. The correlations between genetic distance and geographical distance were investigated using a Mantel test. Analysis of molecular variance was conducted to calculate variance components for variation between two regions,among populations, and within populations using ARLEQUIN version 2. 000. Haplotypes were analyzed using this software. Seven loci were amplified by three pair primers screened from six pair primers. Nei＇s gene diversity （He） was 0. 2922, Shannon information index （I） was 0. 4428 and the coefficient gene differentiation （Gst） was 0. 5805. Genetic variation of Abies ziyuanensis were mainly existed among populations. High level of genetic differentiation was detected between the populations in Yinzhulaoshan and Shunhuangshan and in Dayuan,and the genetic variation between the two regions totally accounted for 68. 87 %.