PEG-6000对不同黑麦草品种萌发期抗旱性的影响  

Influence of PEG-6000 on Drought Resistance of Different Ryegrass Cultivars in Germination Period

作　　者：周巧玲[1] 徐庆国[1] 

机构地区：[1]湖南农业大学农学院,长沙410128

出　　处：《作物研究》2014年第2期159-162,共4页Crop Research

基　　金：中国科学院植物种质创新与特色农业重点实验室开放课题(Y052811t04);湖南省教育厅项目(KC2011B023和CX2012B278)

摘　　要：为了筛选适应湖南地区种植的优良黑麦草品种,采用0、5%、10%、15%、20%的聚乙二醇(PEG-6000)溶液模拟干旱胁迫条件,对13个不同类型黑麦草品种种子的相对发芽率、发芽势、发芽指数、种子活力指数、胚根/胚芽等进行了分析和综合评价。研究结果表明,沃土、特高、俄勒冈四倍体等黑麦草品种种子萌发期的抗旱性强;雅晴、潘多拉、抗锈王、首相、夜影Ⅱ、匹克、剑宝、麦迪和顶峰等黑麦草品种种子萌发期的抗旱性中等;冬绿的种子萌发期抗旱性最差。In order to screen fine perennial ryegrass cultivars fit to be planted in Hunan areas,seed relative germination rate,relative germination energy,relative germination index,relative seed vigor index and contents/germ value among 1 3 different types of ryegrass cultivars were analyzed and assessed synthetically under analogue drought condition with polyeth-ylene glycol （PEG-6000）at the density of 0,5%,1 0%,1 5%,20%. The results showed that the cultivars with strong drought resistance of ryegrass cultivars in seed germination period were Barwoltra,Especially high,Oregon tetraploid;the cultivars with medium drought resistance of ryegrass varieties in seed germination period were YaQing,Pandora,Resist rust king,Premier,Night shadow Ⅱ,Peak,Swords,McGrady and Pinnacle;the resistance of Winter green was the worst.

关 键 词：黑麦草 抗旱性 发芽特性 PEG-6000 

分 类 号：S543.6[农业科学—作物学]