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燕麦草(Arrhenatherum elatius)多倍体复合体的等位酶多样性研究
引用本文:葛学军.燕麦草(Arrhenatherum elatius)多倍体复合体的等位酶多样性研究[J].热带亚热带植物学报,1996,4(4):79-85.
作者姓名:葛学军
作者单位:中国科学院华南植物研究所
摘    要:对欧洲及地中海地区燕麦草复合体27个居群的等位酸电泳调查表明,燕麦草复合体维持比较高的等位酶多样性(He=0.447,A=3.29),亚种间遗传分化较小(G(ST)=0.053);在四个亚种内,也维持着比较高的多样性(He:0.325—0.533),各亚种内的基因多样度主要存在于居群之内,居群间分化较小.四倍体的基因多样性高于二倍体的.燕麦草复合体内居群间基因流较高,表明燕麦草繁育方式主要为风媒远交.对Nei氏标准遗传距离的UPGMA聚类结果表明,四倍体是从二倍体有鳞茎的ssP.baeticum中产生的.

关 键 词:燕麦草  等位酸多样性  多倍体

ALLOZYME DIVERSITY IN POLYPLOID COMPLEX OF ARRHENATHERUM ELATIUS
Ge Xuejun.ALLOZYME DIVERSITY IN POLYPLOID COMPLEX OF ARRHENATHERUM ELATIUS[J].Journal of Tropical and Subtropical Botany,1996,4(4):79-85.
Authors:Ge Xuejun
Abstract:A total of 27 populations of Arrhenatherum elatius collected from Europe and Mediterranean area were sampled and scored for electrophoretic variation at 3 loci.The level of genetic diversity was high in A. elatius and its four subspecies (He:0.3250.533). The total gene diversity in each subspecies was mainly maintained within populations.There were high gene flow estimates among populations (G(ST):0.035-0.1459). The tetraploid subspecies exhibited higher diversity than diploid subspecies. The result of UPGMA on Net's standard genetic distance showed that the tetraploid form was derived from the bulbiferous diploid plants.
Keywords:Arrhenatherum elatius  Allozyme diversity  Polyploid  
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