雀麦属3种多年生牧草在PEG胁迫下种子活力与抗旱性研究  

Studied on the Seed Vigor and Drought Resistance of Three Perennial Forages Belong to Bromus under PEG Stress

作　　者：王东娟[1] 石凤翎[1] 李志勇[2] 师文贵[2] 李鸿雁[2] 田青松[2] 李芳[1] 卞晓燕[1] 

机构地区：[1]内蒙古农业大学生态环境学院,内蒙古呼和浩特010019 [2]中国农业科学院草原研究所,内蒙古呼和浩特010010

出　　处：《种子》2009年第5期31-34,共4页Seed

基　　金：农作物基因资源安全保存评价关键技术研究(2006BAD13B10-08);中央级公益性科研院所基本科研业务费专项基金(06-1-06);内蒙古科技厅草业研究专项(20071923)

摘　　要：用不同浓度的PEG-6000溶液模拟干旱胁迫，比较雀麦属3种多年生牧草（缘毛雀麦、无芒雀麦、沙地雀麦）种子萌发期的种子活力与抗旱性。在5％PEG的干旱胁迫下，Bnutzynska、Bezenchukii无芒雀麦的种子活力较低，但在10％-20％PEG的干旱胁迫下，两者的种子活力较高，而内蒙古正镶蓝旗野生沙地雀麦和内蒙古克什克腾旗野生沙地雀麦种子活力较低。采用隶属函数法对各材料的相对发芽率、相对发芽指数、相对活力指数和抗旱指数进行了抗旱性综合评价。结果显示，内蒙古正镶蓝旗野生无芒雀麦、内蒙古克什克腾旗野生缘毛雀麦抗旱性较强，Brudzynska无芒雀麦、缘毛雀麦9708品系、Bezenchukii无芒雀麦居中，内蒙古正镶蓝旗野生沙地雀麦、内蒙古克什克腾旗野生沙地雀麦抗旱性较弱。Seed vigor and drought resistance of three perennial forages belong to Bromus （Bromus ciliatus,Bromus inermis,Bromus ircutensis） in the period of seed germination were compared under PEG-6000 of different levels drought stress. The results indicated that the seed vigor of Brudzynska,Bezenchukii Bromus inermis is lower under the level of 5%, but it is high under the level of 10% - 20%. Relative germination rate, relative germination index, relative vigor index and drought-resistance index of the materials under the drought stress simulated by PEG were evaluated synthetically membership function method. And the drought resistance ofBromus inermis in Inner Mongolia Zheng Xiang Lan Qi and Bromus ciliatus in Ke Shi Ke Teng Qi is higher; the drought resistance of Brudzynska Bromus inermis ,Bromus ciliatus 9708, Bezenchukii Bromus inermis is medial;Bromus ircutensis＇ s in Inner Mongolia Zheng Xiang Lan Qi and Ke Shi Ke Teng Qi is low.

关 键 词：缘毛雀麦 无芒雀麦 沙地雀麦 种子活力 PEG 抗旱性 

分 类 号：S541[农业科学—作物学]