CAJ | 학술논문

【目的】目前两面针(Zanthoxylum nitidum )野生资源逐渐减少,开展对其居群遗传学研究有利于两面针野生资源的保护和可持续利用。【方法】利用 ISSR 分子标记对11个广西两面针自然居群共138个样本进行DNA多态性分析。【结果】从100个随机引物中筛选出8个有效引物,共扩增出63个DNA片段,都为多态性条带,多态位点百分率(P )为100%。两面针在物种水平上具有较高遗传多样性,Nei's 基因多样性(He)和Shannon信息指数(I )分别为0.227和0.356。两面针11个居群的遗传分化系数(Gst)为0.490,居群内变异占51%,居群间变异占49%,说明居群间和居群内的遗传分化基本持平；居群间基因流(Nm)为0.52,表明居群间基因流动较贫乏。各居群间的遗传距离在0.053~0.334之间,居群间的聚类及 Mantel 检验(r=0.391,p=0.040)均表明广西两面针居群地理距离与遗传距离之间的相关性不明显。【结论】广西野生两面针种质资源多样性较高,有利于培育高品质的药材品种；就地保护是两面针资源保护的首选,选择个体数量多、居群内变异系数大,自然环境不易受到人为影响的天然居群进行保护。
【목적】목전량면침(Zanthoxylum nitidum )야생자원축점감소,개전대기거군유전학연구유리우량면침야생자원적보호화가지속이용。【방법】이용 ISSR 분자표기대11개엄서량면침자연거군공138개양본진행DNA다태성분석。【결과】종100개수궤인물중사선출8개유효인물,공확증출63개DNA편단,도위다태성조대,다태위점백분솔(P )위100%。량면침재물충수평상구유교고유전다양성,Nei's 기인다양성(He)화Shannon신식지수(I )분별위0.227화0.356。량면침11개거군적유전분화계수(Gst)위0.490,거군내변이점51%,거군간변이점49%,설명거군간화거군내적유전분화기본지평；거군간기인류(Nm)위0.52,표명거군간기인류동교빈핍。각거군간적유전거리재0.053~0.334지간,거군간적취류급 Mantel 검험(r=0.391,p=0.040)균표명엄서량면침거군지리거리여유전거리지간적상관성불명현。【결론】엄서야생량면침충질자원다양성교고,유리우배육고품질적약재품충；취지보호시량면침자원보호적수선,선택개체수량다、거군내변이계수대,자연배경불역수도인위영향적천연거군진행보호。
Objective]Zanthoxylum nitidum (Rutaceae)is an important medicinal plant mainly distributed in southern China.In recent years,however,the distribution range of this species has been reduced greatly due to human over exploitation and deterioration of its habitat.Stud-ying the population genetics of this species is essential for the conservation and sustainable uti-lization of the plant germplasm resource.[Methods]In this study,we used eight ISSR markers to measure genetic diversity of 138 individuals from eleven populations of Z.nitidum in Guan-gxi.[Results]A total of 63 DNA fragments were scored,and the percentage of polymorphic bands (P )was 100%.High level of genetic diversity was detected inZ.nitidum (He=0.227;I=0.356).AMOVA analysis indicated that coefficient of genetic differentiation(Gst)was 0.490 (51% of the total genetic variation resided within a population and 49% between popula-tions),which demonstrated that the genetic variation between populations and within a popula-tion was roughly equal.Gene flow (Nm)between each population was 0.52,which showed a relatively lacking gene flowing.The genetic distance between each population ranged 0.053~0.334.The results of Mantel test (r=0.391,p=0.040)and UPGMA cluster indicated that there was no significant relationship between geographical distance and genetic distance.[Con-clusion]This investigation indicats that the ge-netic diversity of Z.nitidum in Guangxi is high, which is good for the cultivation of high quality herbmedicine;In situ conservation is advocated first,and keeping a stable environment for this herb is necessary.