71份冬小麦苗期渗透胁迫抗性鉴定及相关农艺性状指标分析  

Identification of Osmotic Stress Resistance and Analysis of Related Agronomic Traits of 71 Winter Wheat Seedlings

作　　者：杨丹丹 韩雪 孔欣欣 赵国轩 苏亚中 赵鹏飞 金建猛 赵国建 Yang Dandan;Han Xue;Kong Xinxin;Zhao Guoxuan;Su Yazhong;Zhao Pengfei;Jin Jianmeng;Zhao Guojian(Kaifeng Academy of Agriculture and Forestry Sciences,Kaifeng 475004,Henan,China)

机构地区：[1]开封市农林科学研究院,河南开封475004

出　　处：《作物杂志》2025年第1期243-249,共7页Crops

基　　金：河南省现代农业产业技术体系专项(HARS-22-01-Z2);开封市重点研发专项(22ZDYF009)。

摘　　要：为了解不同冬小麦品种(系)的渗透胁迫抗性,筛选有效苗期抗旱指标,缩短抗旱小麦品种筛选周期,以71份冬小麦品种(系)为试验材料,采用PEG-6000模拟田间干旱胁迫,在干旱胁迫和对照下测定8个苗期指标,分别为总叶片数、倒二叶叶宽、倒二叶叶长、倒二叶叶绿素含量、株高、根长、地下鲜重和地上鲜重。采用隶属函数法、聚类分析法、主成分分析等对其渗透胁迫抗性进行综合评价。结果表明,对照组各指标的变异系数为9.77%~68.26%,胁迫组变异系数为12.51%~69.15%,2组的地下鲜重变异系数均为最大,胁迫组的地下鲜重低于对照,其余各项指标变幅稍有不同。2个处理下各苗期指标相关性变化幅度不同,各性状间存在交互影响作用,用综合抗旱系数D值进行苗期抗旱性评价。对各性状抗旱系数的隶属函数值进行主成分分析,将8个性状归纳为4个主成分,累计贡献率达73.204%。通过聚类分析将71份小麦材料分为高抗、抗、中抗、干旱敏感4个类群,其中8份达到抗旱及以上水平。In order to understand the osmotic stress resistance of various winter wheat varieties(lines),screen effective drought resistance indexes at the seedling stage,and shorten the time of screening drought-resistant wheat varieties,71 winter wheat varieties(lines)were used as experimental materials.Field drought stress was simulated by using PEG-6000,and eight seedling stage indexes were determined under drought stress and control environment,including total leaf number,penultimate leaf width,penultimate leaf length,penultimate leaf chlorophyll content,plant height,root length,underground fresh weight,and aboveground fresh weight.The osmotic-stress resistance of wheat varieties(lines)was comprehensively evaluated by means of membership function method,cluster analysis and principal component analysis.The results showed that the variation coefficient of each index in the CK were 9.77%-68.26%,and those in the stress group were 12.51%-69.15%,and the variation coefficients of underground fresh weights were the largest in both groups.The underground fresh weight of stress group was lower than that of CK,and the other indexes varied slightly.Under the two treatments,the correlation changes of seedling traits were different,and there was interaction among the traits.The comprehensive drought resistance coefficient(D)was introduced to evaluate the drought resistance at seedling stage.Principal component analysis was carried out on the subordinate function values of drought-resistance coefficient of each characteristic,and eight characteristics were summarized into four components,with a cumulative contribution rate of 73.204%.Cluster analysis divided 71 wheat materials into four groups:high resistance,drought resistance,moderate resistance and drought sensitivity,of which eight materials were above the drought resistance level.

关 键 词：冬小麦 渗透胁迫抗性 抗旱性 聚类分析 

分 类 号：S512.11[农业科学—作物学]