随机扩增多态性DNA技术对湘产蛇莓种质资源的遗传多样性分析Δ

摘要

OBJECTIVE:To study the genetic diversity of germplasm resources of Duchesnea indica from Hunan. METHODS:The random amplified polymorphic DNA(RAPD)reaction system of germplasm resources was established and RAPD-PCR was ad-opted to detect the expressions of 24 groups of D. indica from Hunan(including 21 wild and 3 cultivated varietos in different geo-graphical distribution). Agarose gel electrophoresis was used to analyze the results and calculate allele number (Na),effective al-lele number (Ne) the polymorphism points percentage (PPB),Nei’s gene diversity index (H) and Shannon’s information index (I). RESULTS:Totally 14 polymorphic primers were screened and 90 electrophoresis bands were amplified,including 81 polymor-phic bands with Na of 1.900 0,Ne of 1.540 1,PPB of 90.0%,H of 0.312 8 and I of 0.467 5. CONCLUSIONS:The genetic diver-sity of D. indica from Hunan is rich,and there were differences in genetic background between the cultivated species and wild spe-cies;clustering results show significant correlation with geographic distribution.%目的：研究湘产蛇莓种质资源的遗传多样性。方法：建立不同地理分布的蛇莓种质资源随机扩增多态性DNA（RAPD）反应体系，RAPD-聚合酶链反应（PCR）法检测湘产24组蛇莓样本（21个野生品，3个栽培品），琼脂糖凝胶电泳分析结果，计算等位基因数（Na）、有效等位基因数（Ne）、多态性位点百分比（PPB）、Nei’s基因多样性指数（H）、Shannon’s信息指数（I）。结果：筛选出多态性引物14条，共扩增出90条电泳谱带，其中多态带为81条，Na为1.9000，Ne为1.5401，PPB为90.0％，H为0.3128，I为0.4675。结论：湘产蛇莓各区域样本间遗传多样性丰富，人工栽培品与野生品之间存在遗传背景上的差异，聚类结果与地理分布表现出明显相关性。