不同种质玉米自交系种子萌发的干旱胁迫  

Drought Stress on Different Maize Inbred Lines at Germination Stage

作　　者：任杨柳 乔大河 胡春辉[1] 张龙[1] 李玉玲[1] Ren Yangliu Qiao Dahe Hu Chunhui Zhang Long Li Yuling(Agronomy College of Henan Agricultural University/Collaborative Innovation Center of Henan Grain Crops/ National Key Laboratory of Wheat and Maize Crop Science, Zhengzhou 450002 Life Science and Technology Center of China National Seed Group Co., Ltd, Wuhan 430206)

机构地区：[1]河南农业大学农学院/河南粮食作物协同创新中心/小麦玉米作物学国家重点实验室,郑州450002 [2]中国种子集团有限公司生命科学技术中心,武汉430206

出　　处：《中国农学通报》2017年第9期17-21,共5页Chinese Agricultural Science Bulletin

基　　金：基金项目:河南省现代农业产业技术体系玉米遗传育种岗位专家(S2010-02-G01)

摘　　要：种子萌发期是植物生长的重要时期,也是评价作物耐旱性强弱的主要时期。为了明确不同玉米自交系的耐旱性,本研究采用聚乙二醇(PEG)模拟干旱条件,对254份不同种质玉米自交系进行种子萌发期处理。通过检测发芽指数、发芽率、根数、根鲜重、根干重、茎鲜重、茎干重、根长、苗高等种子发芽性状,以其相对值为指标,鉴定不同自交系种子萌发期的耐旱性。结果表明,在PEG6000处理胁迫下,玉米自交系种子萌发受到抑制;各性状相对指标都与品种综合抗旱能力呈显著或极显著正相关;不同自交系的耐旱性存在较大差异,通过隶属函数法结合抗旱分级标准筛选出99份中等耐旱材料。因此,该方法可以作为一种简单的玉米自交系萌发期耐旱性鉴定方法。Seed germination is an important period of plant growth, as well as a main period for evaluatingdrought tolerance. In order to clarify the drought tolerance of different maize inbred lines, 254 germplasmmaize inbred lines at germination stage were treated with PEG under simulated drought condition. Thegermination index, germination rate, root number, root fresh weight, root dry weight, stem fresh weight, stem dryweight, root length and seedling height were measured. The relative indexes were used to identify the droughttolerance of different inbred lines at seed germination stage. The results showed that： seed germination of maizeinbred lines was inhibited under PEG6000 stress; the relative indexes of all traits were significantly or verysignificantly correlated with comprehensive drought tolerance of the cultivars; the drought tolerance of differentinbred lines were significantly different; through the subordination function method combined with droughttolerance grading criteria, we screened 99 materials with medium drought tolerance. Therefore, this method canbe used as a simple way to identify the drought tolerance of maize inbred line at germination stage.

关 键 词：玉米 自交系 萌发期 干旱胁迫 隶属函数法 

分 类 号：S-3[农业科学]