PEG-6000对不同黑麦草品种萌发期抗旱性的影响

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。

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

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.