Genetic Variation and Clonal Diversity of the Two Divergent Types of Clonal Populations of Leymus chinensis Tzvel on the Song Liao Steppe in the West of Northeastern China

编号 zgly0000369368

文献类型 期刊论文

文献题名 Genetic Variation and Clonal Diversity of the Two Divergent Types of Clonal Populations of Leymus chinensis Tzvel on the Song Liao Steppe in the West of Northeastern China

学科分类 220.1520;林木遗传学

作者 Yu-ShengWANG  Xiao-HuaTENG  Da-MingHUANG  MikiNAKAMURA  Rui-MinHONG 

作者单位 GrasslandResearchStation  DepartmentofBiologicalSciencesandBiotechnology 

母体文献 Journal of Integrative Plant Biology;植物学报: 英文版 

年卷期 2005,47(7)

页码 811-822

年份 2005 

分类号 Q943 

关键词 遗传变异  松辽平原  无性系  品种多样性  品种类型  Leymus  chinensis 

文摘内容 The genetic variation and clonal diversity of two divergent types (grey-green and yellow-green) of clonal populations of Leymus chinensis Tzvel at 14 loci were compared. Total gene diversity (HT) and the coefficient of genetic differentiation (GST) were all higher for the yellow-green type (HT = 0.270; GST =0.186) than for the grey-green type (HT = 0.250; GST = 0.157) of L. chinensis. Rare alleles usually occurred as heterozygotes rather than homozygotes and significant deviations from Hardy-Weinberg equilibrium were found only at a few loci. This indicated that these two types of populations were mainly out-crossing. Clonal diversity, evenness of clones, and mean clone size were not significantly different between the two types. We found that differences between the clone size and genetic variation of the yellow-green type of populations occurred with different climate and habitat population groups. However, for the grey-green type of populations, these genetic variations decreased under conditions of different climate and habitat population groups。