当前位置: 首页 > 文章 > 山蜡梅复合体的遗传多样性和居群遗传分化研究 北京林业大学学报 2012 (1) 111-117
Position: Home > Articles > Genetic diversity and differentiation of Chimonanthus nitens complex populations Journal of Beijing Forestry University 2012 (1) 111-117

山蜡梅复合体的遗传多样性和居群遗传分化研究

作  者:
李响;周明芹;赵凯歌;陈龙清
单  位:
华中农业大学林学系;华中农业大学园艺植物生物学教育部重点实验室;华中农业大学园艺林学学院;长江大学园艺园林学院
关键词:
山蜡梅;分子标记;遗传多样性;RAPD;ISSR
摘  要:
将山蜡梅、浙江蜡梅、突托蜡梅统称为山蜡梅复合体,应用RAPD和ISSR标记分别对来自7个不同居群共201个山蜡梅复合体单株进行DNA多样性检验。结果显示:从38个ISSR引物中筛选出12个条带清晰、重现性好、多态性高的引物,扩增出总条带数142条,大小在300~2800bp,多态率达94.37%,PIC0.31,MI3.33。在80个RAPD引物中,选出了12条合适的引物,扩增出条带数226条,大小在150~2200bp,多态率达95.13%,PIC0.37,MI4.91。两种分子标记计算出山蜡梅复合体居群的Nei’s基因多样性指数为0.2952,Shannon信息指数为0.4884,反映出山蜡梅复合体丰富的遗传多样性。进一步的AMOVA分析显示,山蜡梅复合体遗传变异大部分来自居群内变异,并且都达到极显著水平,这表明7个地理居群间存在着比较明显的遗传分化。UPMGA聚类分析发现,7个山蜡梅复合体居群被归为明显的3大支,且地理距离相邻的居群遗传距离也近,说明居群的聚类和地理距离有关。同时分析结果还为解决存在争议的新种的分类工作提供分子水平的有力证据。
译  名:
Genetic diversity and differentiation of Chimonanthus nitens complex populations
作  者:
LI Xiang1;ZHOU Ming-qin2;ZHAO Kai-ge1;CHEN Long-qing1. 1 College of Horticulture and Forestry Sciences,Huazhong Agricultural University,Wuhan,430070,P.R.China;2 College of Horticulture and Gardening,Yangtze University,Jingzhou,434023,P.R.China
关键词:
Chimonanthus nitens;molecular markers;genetic diversity;RAPD;ISSR
摘  要:
Genetic diversity and genetic relationship of 201 individuals from seven populations of Chimonanthus nitens complex including C.nitens,C.zhejiangensis and C.grammatus,were investigated with ISSR and RAPD markers.The result showed that:1) 12 out of 38 ISSR markers and 12 out of 80 RAPD markers were detected to be polymorphic.2) 142 and 226 bands were amplified with ISSR primers and RAPD primers,respectively,with PPL (percentage of polymorphic loci) values 94.37% and 95.13%.3) The mean Nei's gene diversity index (h) of populations using combined ISSR+RAPD data was 0.295 2 and Shannon's information index (I) was 0.488 4 which indicated a high level of genetic diversity.4) AMOVA analysis of genetic diversity showed that most of the variations exist within the populations.5) The dendrogram using UPGMA method clustered the seven populations into three groups,reflecting the relationship between geographical substructure and genetic diversity.The results provide forceful evidence for resolving the problem of ascription of C.zhejiangensis and C.grammatus at DNA level.

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