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小麦抗旱相关农艺性状和生理生化性状的灰色关联度分析
引用本文:王士强,胡银岗,佘奎军,周琳璘,孟凡磊.小麦抗旱相关农艺性状和生理生化性状的灰色关联度分析[J].中国农业科学,2007,40(11):2452-2459.
作者姓名:王士强  胡银岗  佘奎军  周琳璘  孟凡磊
作者单位:1. 西北农林科技大学农学院,杨凌,712100
2. 西北农林科技大学农学院,杨凌,712100;陕西省农业分子生物学重点实验室,杨凌,712100
基金项目:教育部国际合作重点项目
摘    要: 【目的】探讨小麦主要农艺性状和部分生理生化性状与抗旱性的关系。【方法】采用灰色关联分析(gray correlation analysis),对分别种植于干旱棚和大田自然降水两个条件下的65个小麦品种的主要农艺性状和部分生理生化性状与其抗旱指数的关联度进行分析和评价。【结果】通过灰色关联度分析确定了各性状与抗旱指数的关联度。各农艺性状和生理生化性状与抗旱指数的关联程度大小依次为:气孔导度(0.7995)、光合速率(0.7909)、蒸腾速率(0.7556)、可溶性糖含量(0.7467)、丙二醛(MDA)含量(0.7336)、游离脯氨酸含量(0.7267)、穗长(0.7102)、穗粒数(0.7095)、千粒重(0.7005)、水势(0.6959)、有效分蘖数(0.6951)和株高(0.6866)。并依据各品种的加权抗旱指数对参试品种进行了聚类分析,聚类结果可以较好的反映品种的选育及适应地区。参试品种中较抗旱的品种有洛旱6号、晋麦47、陕麦168、小偃6号等。【结论】与抗旱指数关联度最大的是和叶片气孔相关的生理生化性状,它们在作物受到干旱胁迫时所受的影响最大,与作物抗旱性关系最为密切。因而可以选用气孔导度、光合速率和蒸腾速率等生理生化性状进行小麦抗旱性的以性状为基础的选择,以提高选择效率。

关 键 词:小麦  抗旱性  农艺性状  生理生化性状  灰色关联度分析
收稿时间:2006-12-4
修稿时间:2006-12-04

Gray Relational Grade Analysis of Agronomical and Physi-Biochemical Traits Related to Drought Tolerance in Wheat
WANG Shi-qiang,HU Yin-gang,SHE Kui-jun,ZHOU Lin-lin,MENG Fan-lei.Gray Relational Grade Analysis of Agronomical and Physi-Biochemical Traits Related to Drought Tolerance in Wheat[J].Scientia Agricultura Sinica,2007,40(11):2452-2459.
Authors:WANG Shi-qiang  HU Yin-gang  SHE Kui-jun  ZHOU Lin-lin  MENG Fan-lei
Institution:1College of Agronomy, Northwest Agricultural and Forest University, Yangling 712100; 2Shaanxi Key Laboratory of Molecular Biology for Agriculture, Yangling 712100
Abstract:【Objective】This paper aims to probe the relationship between agronomical characters and physi-biochemical indexes of wheat cultivar with its drought tolerance. 【Method】 12 indexes, including 5 agronomical characters and 7 physi-biochemical indexes that measured in 65 wheat cultivars grown at drought shelf and no-irrigation conditions, were analyzed using gray relational grade analysis method. 【Result】 Gray correlation degrees facilitating to identify the drought tolerance of wheat were calculated between each index and its drought resistance index, they were ranked as follows by their contribution to drought tolerance: stomata conductance (γ=0.7995), photosynthetic rate (γ=0.7909), transpiration rate (γ=0.7556), soluble sugar content (γ=0.7467), MDA content (γ=0.7336), dissociative proline content (γ=0.7267), spike length (γ=0.7102), number of kernel per spike (γ=0.7095), 1000-kernel weight (γ=0.7005), water potential (γ=0.6959), tiller (γ=0.6951), plant height (γ=0.6866). And the clustering analysis based on the weighted drought index of cultivars could finely represent their breeding and application areas. Species that have the best drought resistance among the 65 species are: Luohan 6, Xiaoyan 6, Jinmai 47, Shanmai 168 etc. 【Conclusion】 The result indicates that the physi-biochemical indexes related to leaf stomata have the closest relationship with the drought resistance of wheat, and these indexes are significantly influenced under water stress, thus have the greatest relation degree with drought resistance index, so the physi-biochemical indexes including stomata conductance, photosynthetic rate and transpiration rate should be used for the assistant selection of drought tolerance to improve the selection efficiency.
Keywords:Wheat  Drought tolerance  Agronomic traits  Physi-biochemical traits  Gray correlation analysis
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