小麦苗期抗旱类型研究  

Types of drought resistance of wheat at seedling stage

作　　者：卫云宗[1] 刘新月[1] 张久刚[1] 

机构地区：[1]山西省农业科学院小麦研究所,临汾041000

出　　处：《中国生态农业学报》2008年第6期1409-1412,共4页Chinese Journal of Eco-Agriculture

基　　金：国家高技术研究发展计划"863计划"节水重大专项(2006AA100201)资助

摘　　要：为探索小麦苗期对水分胁迫的适应性,利用反复干旱法研究了942份小麦材料的苗期抗旱类型。结果表明,小麦苗期抗旱性存在显著差异,3次反复干旱后,小麦品种间成活率变异系数为4.6%～43.51%。根据品种反复干旱后成活率,供试品种对水分胁迫响应划分为抗旱型、耐旱型和敏感型。苗期抗旱性强的小麦品种具有较少种子根、较多次生根和较强分蘖量。小麦苗期抗旱性与后期抗旱性缺乏一致性,与品种的千粒重和冬春性无明显关系。Types of drought resistance at wheat seedling stage were investigated for 942 wheat varieties using repeated drought method to learn wheat adaptability to water stress at seeding stage.The results show that drought resistance is significantly different among different wheat varieties at seedling stages.Variation coefficient of survival rate among wheat varieties is 4.6%～43.51% after 3 times of repeated drought treatment.Tested varieties are classified as resistant,tolerant and sensitive to water stress based on survival rate following a repeated drought treatment.There are fewer seed roots,more secondary roots and stronger tiller numbers for wheat varieties with stronger resistance to drought at seedling stage.Wheat resistance to drought at seedling stage is inconsistent with that at the late stages and has no clear correlation with 1000-grain weight or the seasonality（winter or spring） of wheat.

关 键 词：小麦 水分胁迫 抗旱类型 苗期 反复干旱法 

分 类 号：S512.11[农业科学—作物学]