龙须草种质资源生境特征与主要经济性状比较  

Habitat features and principal economic characteristics of Eulaliopsis binata germplasm resources

作　　者：刘飞[1,2] 邹冬生[1] 喻夜兰[2] 朱战强[3] 吴少平[2] 朱育峰[1] Fei Liu Dongsheng Zou Yelan Yu Zhanqiang Zhu Shaoping Wu Yufeng Zhu(College ofBioscience andBiotechnology, Hunan Agricultural University, Changsha 410128 Oriental Science ＆ Technology College of Hunan Agricultural University, Changsha 410128 Geography and Planning School of Sun Yat-Sen University, Guangzhou 510275)

机构地区：[1]湖南农业大学生物科学技术学院,长沙410128 [2]湖南农业大学东方科技学院,长沙410128 [3]中山大学地理科学与规划学院,广州510275

出　　处：《生物多样性》2016年第12期1400-1407,共8页Biodiversity Science

基　　金：国家"863"计划项目(2011AA100209);国家自然科学基金(41401166)

摘　　要：龙须草(Eulaliopsis binata)是一种特色野生生物资源,是优质造纸原料和防止水土流失的优良草种。以往针对龙须草种质资源收集和评价研究近于空白。本文通过对中国内陆龙须草种质资源集中分布的9省20县的实地考察,收集了20个居群的龙须草样本,分析了龙须草种质资源生境的主要特征,并对龙须草种质资源主要经济性状进行比较。结果表明:收集的龙须草种质资源集中分布于22°–34°N、101°–114°E,海拔集中在100–1,000 m,年平均气温在14–22℃,年日照时数在1,112–2,624 h,年平均降水量在642–2,330 mm之间。气候因子主成分分析显示,龙须草分布受温度与降水量影响较大,其次为海拔和日照时数。不同龙须草种质资源叶长、胞壁厚度、腔径、壁径比、产量等主要经济性状呈现出极显著差异。主要经济性状ward聚类可将收集的龙须草种质资源分为3类,其中9个种质资源可优先作为优良龙须草筛选育种的参考对象。Eulaliopsis binata, a typical wild living resource, is an excellent grass species which is used as material for papermaking and can prevent water loss and soil erosion. Since there are few studies examining the resource collection and assessment of E. binata, in this paper we attempt to use field studies on concen- trated areas of Chinese E. binata germplasm resources in 20 counties in nine provinces, collect 20 kinds of E. binata germplasm resources, analyse the principal living environmental characteristics of collection areas of E. binata germplasm resources, and compare the principal economic characteristics of E. binata germplasm resources. Results showed that the collections ofE. binata were mainly located in the ranges of 22°-34°N、101°-114°E, with an elevation of 100-1,000 m, annual average temperatures of 14-22℃, annual sunshine hour ranges of 1,112-2,624 h, and annual average rainfall amounts between 642-2,330 mm. Principal component analysis of climate factors ofE. binata showed that the distribution ofE. binata was more influenced by temperature and rainfall, while less so by elevation and sunshine hours. The principal economic charac- teristics of E. binata germplasm resources, such as leaf length, thickness of cell walls, diameter of the cavity, ratio of cell wall and diameter of cavity and yield, show significant differences. Using ward clustering analy- sis of the principal economic characteristics, the collected E. binata germplasm resources can be divided into 3 categories, of which nine E. binata germplasm resources can be used as reference species for excellent E. binata selection and breeding. The study provides evidence for the selection of improved varieties and utili- zation ofE. binata germplasm resources.

关 键 词：龙须草 造纸材料 生境 经济性状 产量 

分 类 号：Q948[生物学—植物学]