【摘要】 采用不连续系统的聚丙烯酰胺垂直板凝胶电泳(VPAGE)对新疆新麦草的5个天然居群和1个栽培种遗传多样性和居群结构进行了分析。测定的6个酶系统中,确定了9个等位酶位点,多态位点百分率平均值为90.48%,平均等位基因数为2.920 7,平均预期杂合值为0.542 7。总的基因多样性中,86%存在于居群内,14%来自居群间。聚类分析以遗传距离D=0.14为分界线将6份材料明显地分为2组。研究表明,新麦草具有丰富的遗传多样性,其多样性可能与生境、人工驯化、风媒异交等因素有关。更多还原

【Abstract】 Allozyme genetic diversity of 5 natural populations and 1 cultivar of Psathyrostachys juncea originated from Xingjian,China were analyzed by vertical polyacrylamide gel electrophoresis.Six enzymes revealed 9 loci.The mean of percentage of polymorphic loci(P) was 90.48% and number of alleles per locus(Ae) was 2.920 7.The mean of the expected heterozygosity(He) was 0.5427.Eighty six percent of the diversity resided within populations(GST=0.14).The cluster analysis indicated that 6 accessions were separated into two distinct groups from genetic D=0.14.And the result indicated that 6 populations had high genetic diversity and may attribute to the environment,domestication and cross-pollination.更多还原