安徽农业科学2016，Vol.44Issue(19)：38-41,4.
干旱胁迫下不同油菜新品种萌发期耐旱性的比较
Comparison in Drought Resistance of Different Rapeseed Varieties in Germination Period under Drought Stress
摘要
Abstract
Objective] To compare the drought resistance of different rapeseed varieties in germination period under drought stress.[Meth-ods] Through simulating the drought condition taking PEG6000 as permeating medium, germination of rapeseeds were identified under drought stress for 7 new rapeseed varieties.The germination rate, germination index, vitality index, radicle and plumule length were measured, and germination traits at different concentration were analyzed.[Results] Under drought resistance, sprout length and germination index of test va-rieties significantly declined.Besides, root length and germination rate firstly rose then declined with increase in PEG6000 concentration.Relat-ed analysis indicated that low PEG6000 concentration is helpful for rapeseed germination, while high PEG6000 concentration inhibits germination. Also, the inhibition action increases with the increase in PEG6000 concentration.Furthermore, the germination rate under drought stress can be characterized by the germination index, total length, and total fresh weight.[ Conclusions] Different rapeseed varieties have different drought resistance.According to analysis, Shaanyou 803 and Youyan 817 have the highest drought resistance, Zhongshuang 11 has higher drought re-sistance, Xiangzayou 188 has general drought resistance, and Zhongyouza 16, Shaanyou 16 and Zheyou 51 are drought sensitive varieties.关键词
油菜/发芽指数/PEGKey words
Rapeseed/Germination index/PEG分类
农业科技引用本文复制引用
庞红喜,赵兰芝..干旱胁迫下不同油菜新品种萌发期耐旱性的比较[J].安徽农业科学,2016,44(19):38-41,4.基金项目
陕西省科学技术研究发展计划项目（2014K01－04－01）。 （）
