沙生植物沙鞭不同居群形态变异研究  

Morphological Variations of Different Populations from Psammochloa villosa,a Peculiar Sandy Plant

作　　者：吕婷 刘涛[1,2] 梁瑞芳 苏旭[1,2,3] 刘玉萍 LÜ Ting;LIU Tao;LIANG Rui-Fang;SU Xu;LIU Yu-Ping(College of Geographical Science,Qinghai Normal University,Xining 810008;Key Laboratory of Medicinal Animal and Plant Resources of Qinghai-Tibet Plateau in Qinghai Province,Qinghai Normal University,Xining 810008;College of Life Sciences,Qinghai Normal University,Xining 810008)

机构地区：[1]青海师范大学地理科学学院,西宁810008 [2]青海师范大学青海省青藏高原药用动植物资源重点实验室,西宁810008 [3]青海师范大学生命科学学院,西宁810008

出　　处：《植物研究》2021年第1期60-66,共7页Bulletin of Botanical Research

基　　金：国家自然科学基金项目(41761009);青海省科技计划基础研究计划项目(2019-ZJ-7011)。

摘　　要：以沙鞭(Psammochloa villosa Bor.)20个自然居群为研究对象,对其株高、花序长度、旗叶长度、旗叶宽度和小穗长度等12个表型性状进行形态变异研究。结果显示,12个性状群体间F值为1.832~8.958,达到显著或极显著水平,表明沙鞭不同居群表型性状存在广泛变异,且变异程度各不相同;主成分分析结果显示,前4个主成分代表了沙鞭形态多样性的82.277%,其中旗叶长度、旗叶宽度、颖片长度、小穗长度等是造成不同居群表型性状差异的主要因素;依据欧式距离对参试居群进行的UPGMA聚类分析结果表明,当遗传距离为20.5时,可以将20个沙鞭野生居群划分为两类,且各表型性状并没有依居群地理分布而聚类。An experiment was conducted to analyze the morphological variation in terms of 12 phenotypic traits,including height of plant,length of spike,length of flag leaf,width of flag leaf,length of spikelet et al,using 20 natural populations of Psammochloa villosa.F value of 12 trait populations was 1.832‒8.958,which reached a significant or extremely significant level,the phenotypic traits of different populations of P.villosa were widely varied,and the degree of variation was different.By principal component analysis,the first four principal components represented 82.277%of the morphological diversity.The PCA results indicated that the length of flag leaf,width of flag leaf,length of glume and length of spikelet were the main factors leading to morphological variations of different populations.When the genetic distance is 20.5,20 natural populations of P.villosa could be divided into 2 groups by UPGMA cluster analysis,and the phenotypic characters were not clustered according to the geographical distribution of the populations.

关 键 词：沙生植物 沙鞭 表型性状 形态变异 欧式距离 

分 类 号：S793.6[农业科学—林木遗传育种]