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[摘要]
目的 分析千斤拔属植物种间亲缘关系,并对其进行初步质量评价,为筛选新药源提供理论依据。方法 应用ISSR分子标记技术,对14种千斤拔属植物进行亲缘关系分析;同时,采用紫外分光光度法测其总黄酮量。结果 从60个ISSR引物中筛选出30个引物用于试验,共扩增出367个条带,其中多态性条带363条,共有带4条,多态性条带比例(PPB)为98.91%,遗传相似系数(GS)在0.566 8~0.833 8,表现出丰富的遗传多样性;亲缘关系最近的为云南千斤拔和蔓性千斤拔,遗传距离最远的为细叶千斤拔和墨江千斤拔;总黄酮量最高的为勐捧千斤拔,其次为蔓性千斤拔,云南千斤拔总黄酮量也较高。结论 千斤拔属植物具有丰富的遗传多样性,云南千斤拔有成为药用植物蔓性千斤拔替代品的潜力。
[Key word]
[Abstract]
Objective To analyze the genetic relationship of the plants in Flemingia Roxb. ex Ait. et Ait. f. and make preliminary quality accessment, in order to provide the theoretical basis for screening the new medicinal resource. Methods Inter-simple sequence repeats (ISSR) markers were used to analyze the genetic relationship of 14 species in Flemingia Roxb. ex Ait. et Ait. f.. Meanwhile, spectrophotometry was used to measure total flavones. Results Thirty primers were screened out of 60 ISSR random primers and produced 367 bands totally. Among them 363 bands (98.91%) were polymorphic, four bands were owned by all; The genetic similarity (GS) was 0.566 8 -0.833 8, showing abundant genetic diversity; F. wallichii and F. philippinensis have the closest genetic relationship, F. lineate and F. chappar have the largest genetic distance; The highest content of total flavones is in F. mengpengensis and secondary is in F. philippinensis, total content of flavones in F. wallichii is above average. Conclusion The plants in Flemingia Roxb. ex Ait. et Ait. f. have the abundant genetic diversity. As medicinal plants, F. wallichii has the potential for replacing F. philippinensis.
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[基金项目]
中国医学科学院药用植物研究所中央级公益性科研院所基本科研业务专项(YZYN-09-04)