草业学报Issue(5)：141-152,12.DOI:10.11686/cyxb20150517
短芒披碱草异位保护群体的表型多样性研究
Phenotypic variations in seven ex-situ conservation populations ofElymus breviaristatus
摘要
Abstract
This paper reports on research undertaken to reveal phenotypic variations and variation patterns in seven ex-situ conservation populations of Elymus breviaristatus from the northwestern Sichuan Plateau.32 phenotypic traits for 84 individuals were investigated using the methods of nested analysis of variance,coeffi-cient of variation,principal coordinate (PCO)analysis and cluster analysis.There were significant differences in morphological characteristics within and between the populations of E .breviaristatus .The mean phenotypic differentiation coefficient (V ST )between populations was 41.66%,which was less than that within populations (58.33%).The average V ST of culm,leaf,spike,spikelet,glume,lemma and palea were 55.9%,63.2%, 38.6%,43.7%,31.5% and 33.1%,respectively.The stability of traits related to spike was higher than that of other traits.There were no significant correlations between the tested traits and eco-geographical factors ex-cept LGL (length of lower glume)and NVLM (number of veins of lemma).The results of UPGMA cluster a-nalysis by Euclidean distance showed that the seven populations could be divided into four groups.Euclidean distance had no correlation with geographic distance between the collection sites based on the Mantel test (r=0.334,P =0.083).关键词
短芒披碱草/川西北高原/表型多样性Key words
Elymus breviaristatus/the northwestern Sichuan Plateau/phenotypic diversity引用本文复制引用
顾晓燕,郭志慧,张新全,周凯,周朝杰,符开欣,刘新,马啸..短芒披碱草异位保护群体的表型多样性研究[J].草业学报,2015,(5):141-152,12.基金项目
国家科技支撑计划项目（2012BAD13B06，2011BAD17B03）和四川省科技支撑计划（2011SZ0162，2013ZC1635）资助。 （）
