| 引用本文: | 黄 玲,杨文平,梅沛沛,等.砂质脱潮土区不同冬小麦品种（系）抗倒特性研究[J].灌溉排水学报,0,():-. |
| HUANGLING,YANGWENPING,MEIPEIPEI,et al.砂质脱潮土区不同冬小麦品种（系）抗倒特性研究[J].灌溉排水学报,0,():-. |
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| 摘要: |
| 【目的】为了研究河南省砂质脱潮土区冬小麦的抗倒性能。【方法】以河南省砂质脱潮土区种植的13个不同冬小麦品种（系）为研究对象，分析灌浆中期冬小麦农艺性状、茎秆物质特性和力学特性与抗倒性能的关系。对与小麦抗倒指数相关的9个性状进行相关、聚类和主成分分析。【结果】灌 浆中期的株高和重心高度不是冬小麦品种（系）倒伏的决定因素；不同冬小麦品种（系）的基部第2节间的机械强度和抗倒指数与第二节间长度在一定范围内表现出负相关关系，但相关性不显著；与株高构成指数和基二/株高呈极显著和显著负相关关系；与茎粗、茎壁厚度和厚径比达显著和极显著正相关关系。聚类分析中类群Ⅰ通过降低株高和优化基部第二节间来改善抗倒性能。类群Ⅱ通过基部第二节间特性优化来改善抗倒性能，类群Ⅲ通过降低株高和提高茎秆机械强度来降低倒伏。主成分分析得到的3个主成分因子对抗倒性状变异累计贡献率为83.72%。主成分因子Y1反映茎秆指标变异的48.11%，其中茎壁厚度、厚径比、机械强度是决定Y1的主要因素。【结论】抗倒指数是由多因素决定的综合性状，基二/株高、茎壁厚度、茎粗和厚径比可以作为评价抗倒伏指数的指标选项。就砂质脱潮土区提高小麦抗倒育种对策而言，除茎秆的机械强度外，注重基部第二节间长度占株高的比例和茎壁厚度与茎粗的比例也较为重要。 |
| 关键词: 冬小麦品种（系）;砂质土;茎秆特性;机械强度;抗倒指数 |
| DOI： |
| 分类号:S512.1 |
| 基金项目: |
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| Study on Lodging Resistance of Different Winter Wheat Varieties（lines）in Sandy Soil |
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HUANGLING1, YANGWENPING1, MEIPEIPEI1, JIAOSHUANG2, XULINA1, ZHANGZHIYONG1, OUXINGQI1, YAOSUMEI1
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1.Henan Institute of Science and Technology;2.Xinxiang Soil & Fertilizer Working Station
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| Abstract: |
| 【Objective】To study the lodging resistance of winter wheat in sandy soil area of Henan Province.【Method】13winter wheat genotypes (lines) were studied to analyze the relationship between agronomic characteristics, stem material properties, mechanical properties and lodging resistance of winter wheat in the middle stage of grain filling under disease free condition. Nine traits related culm lodging resistance index(CLRI)of the second internode were investigated by the analysis of correlation, cluster and principal component.【Result】Plant height and height of gravity center at the middle of filling stage were not the determinant factors for lodging of winter wheat varieties(lines). The second internode of different winter wheat varieties(lines) correlated negatively with mechanical strength and CLRI within a certain scope. The plant height component index and the ratio of the length of the second internode to plant height were negatively and significantly correlated with mechanical strength and CLRI. culm diameter, stem thickness and the ratio of stem thickness to culm diameter, were positively and significantly correlated with mechanical strength and CLRI. Cluster analysis showed that lodging resistance was improved by the reducing plant height and optimizing the second internode by groupsⅠ. GroupsⅡ improved lodging resistance by optimizing the traits of second internode. Groups Ⅲ decreased lodging by reducing plant height and increasing mechanical strength. There were 3 principal component factors cumulative contributed 83.72% of the total resources in principal component analysis. Principal component factors (PCF) reflected 48.11% variation of stem. Stem thickness, stem thickness /culm diameter and mechanical strength were the major factors which decided PCF1. Plant height, dry density and height of gravity center were key determinate factors of PCF2. Stem thickness and height of gravity center were the main factors to determine PCF3. 【Conclusion】Lodging resistance index (CLRI) is comprehensive trait and determined by multiple factors. The stem lodging resistance strength of wheat varieties could be evaluated through the length of the second internode /plant height, stem thickness, culm diameter, stem thickness /culm diameter. It is suggested that new breeding genotypes strategies are needed to enhance lodging resistance, particularly include mechanical strength, length of the second internode /plant height and stem thickness /culm diameter of the second internodes at sandy soil. |
| Key words: Winter wheat cultivars (lines); Sandy soil; Stem characterizes; Mechanical strength; Culm lodging resistant index (CLRI). |
