贵州野生匍匐剪股颖形态多样性研究  

Morphological Diversities of Wild Agrostis stolonifera L.of Guizhou

作　　者：钟理[1] 尚以顺 杨春燕[3] 陈伟 干友民[1] 唐成斌 

机构地区：[1]四川农业大学草业科学系,四川雅安625014 [2]贵州省草业研究所,四川独山558200 [3]四川农业大学林学园艺学院,四川雅安625014

出　　处：《北方园艺》2008年第6期107-110,共4页Northern Horticulture

基　　金：贵州省科技厅资助项目(黔科合农字[2005]4002号)

摘　　要：以国外引进品种Kromi为对照，对来自贵州3个野生居群的18份匍匐剪股颖材料表型遗传多样性进行分析，利用多种统计方法对选取的10个形态学性状进行统计分析。结果表明：①匍匐剪股颖各形态学性状均存在较大的变异，变异系数分布于18.5%-34.3%之间。②物种遗传多样性指数为1.9991，居群内遗传多样性指数为1.848，则居群间遗传多样性指数为0.1511，这表明贵州野生匍匐剪股颖形态遗传变异多产生于居群内（92.44%），同时居群间也存在一定的遗传分化（7.56%）。③各形态学性状遗传多样性指数，直立枝直径〉匍匐枝叶宽〉节间长〉匍匐枝长〉直立枝叶宽〉株高〉直立枝叶长〉直立枝长〉匍匐枝直径；各居群遗传多样性指数也有所差别，依次为BSE居群〉BNW居群〉LPS居群。④匍匐剪股颖形态遗传多样性构成中，直立枝直径、直立枝叶宽、匍匐枝叶宽、节间长、直立枝长、直立枝叶长为主要构成要素。⑤根据聚类结果，匍匐剪股颖材料并没有按居群来源聚为一类，在居群上没有明显的、有规律的形态分化。In a comparison of Kromi, we researched morphological diversities of wild Agrostis stolonifera L. of Guizhou by 10 morphological indexes. The results showed.① All the morphological indexes showed abundant variance , the CV was from 18.5%-34.3% ② The Hs was 1. 9991, and the Hirl was 1. 848, the HBetween was 0. 1511, it indicates that the most morphological diversities root in among populations. ③ There were some difference of morphological diversity in groups, the group of BSE〉the group of BNW〉the group of LPS. ④The diameter of the erect shoot.the leaf width of the erect shoot.the leaf width of the creeping shoot.the length of the median internode and the leaf length of the erect shoot were the main composing of morphological diversity. ⑤ The results of cluster analysis was disaccorded with Agrostis stolonifera L. ＇s geography distribution.

关 键 词：匍匐剪股颖 形态多样性 

分 类 号：S688.4[农业科学—观赏园艺]