丽江山慈菇RAPD遗传变异初探

目的研究丽江山慈菇Iphigenia indica遗传变异及遗传结构。方法采用RAPD技术，对产自云南的3个居群进行DNA指纹检测。结果筛选出20个随机引物，对3居群扩增共产生120条DNA片段，在0．2～3kb，其中71条谱带具有遗传多态性，约占59．17％，平均每个引物扩增的DNA带数是3．55。Shannon index在丽江玉龙雪山居群(Ca)为0.1994，大理宾川鸡足山居群(Cb)为0．2007，丽江永胜片角镇居群(Cc)为0.2548；居群平均水平为0．2183，物种水平为0．2886。Nei’sgeneticidentity在Ca和Cb居群间为0．9309；在Ca和Cc居群间为0．9327；在Cb和Cc居群间为0，9466。居群间基因分化系数Gst为0．2044。结论RAPD分析可为丽江山慈菇保护对策和措施的制定，遗传育种和GAP种植方法及标准的制定，提供理论依据和基础资料。

Preliminary analysis on genetic variation of Iphigenia indica by RAPD

Object To study on the genetic diversity and genetic structure of Iphigenia indica Kunth. Methods Random amplified polymorphic DNA (RAPD) was applied to detect DNA fingerprints of three populations of I. indicafrom Yunnan Province. Results Twenty primers were screened, and a total of 120 DNA fragments were amplified ranging from 0.2-3 kb, among which 71 (59.17%) were polymorphic. The average number of DNA band produced by each primer was 3.55. The Shannon index was (0.199 4) in Ca population, 0.200 7 in Cb population, 0.254 8 in Cc population, respectively; the average value of populations was 0.218 3. The Shannon index was 0.288 6 in species. Nei's genetic identity was 0.930 9 between Ca and Cb, 0.932 7 between Ca and Cc, 0.946 6 between Cb and Cc. G_(st) within population was (0.204 4.) Conclusion For the establishment of protective tactic and measure, and of the standard of good agriculture practice (GAP) growth and heredity breeding, RAPD analysis provides I. indicawith theoretical foundation and basal data.