青藏高原固沙草属种质资源收集和保存  

Germplasm Collection and Preservation of Orinus (Poaceae) in the Qinghai-Tibet Plateau

作　　者：苏旭[1,2] 岳伟[1] 刘建全[1] 

机构地区：[1]兰州大学生命科学学院草地农业生态系统国家重点实验室,甘肃兰州730000 [2]青海师范大学生命与地理科学学院青藏高原环境与资源教育部重点实验室,青海西宁810008

出　　处：《植物分类与资源学报》2013年第3期343-347,共5页Plant Diversity

基　　金：科技部科技基础性工作专项重点项目(2007FY110100);国家自然科学基金项目(31260052)

摘　　要：固沙草属(Orinus)是禾本科具有重要经济价值的高山特有属,具有较强的抗逆特性,是农业良种繁育、畜牧业牧草改良利用的重要资源。该属记载6个物种,均分布在青藏高原。在过去5年内,我们调查了该属所有物种在青藏高原的分布,并收集了种子、DNA材料和标本;采用ITS序列对物种界限进行了探讨,发现6个物种中只出现两个比较明显的遗传分支,表明原有的一些物种在分类上应予以合并。我们进一步讨论了这些丰富的种质资源对将来研究和利用固沙草属的重要性和相关途径。Orinus is an alpine genus with important values in the grass family （Poaceae）. All six species recognized within this genus are distributed in the Qinghai-Tibet Plateau. In the past five years, we surveyed the distributions of each species in this region and collected germplasm resources, including seeds, DNA and specimens. We further used the ITS sequence variation to tentatively delimit the previously acknowledged species and found that there is no distinct boundary between species and only two distinct lineages were recognized for all six species, indicating that some species should not be treated as separate species. These data provide an important resource for further utilizing and studying this genus.

关 键 词：青藏高原 固沙草属 种质资源 物种划分 

分 类 号：Q948.5[生物学—植物学] Q949