摘要： 以抗倒性不同的15个高产小麦品种（系）为材料，通过进~步的力学分析，提出了“品种倒伏指数”的新概念。经实际应用于品种抗倒性的评价，证明“品种倒伏指数”综合考虑了植株的重心、重量和茎秆机械强度等因素的影响，能客观、准确地评价品种的抗倒性。通径分析结果表明，茎秆机械强度与品种抗倒性关系最为密切。根据不同品种的抗倒性差异，应用系统聚类法首次将品种划分为高抗型、普抗型、中间型和易倒型四种抗倒类型。

关键词: 小麦, 抗倒性, 评价方法, 通径分析, 系统聚类

Abstract: Fifteen high-yield wheat varieties were investigated. A new concept "Variety lodging index" (VLI) involving gravity centre, weight and machinery property of stem, was proposed and the results proved that the VLI could evaluate the lodging resistance objectively and accurately. The stem strength was closely related to variety lodging resistance. These varieties were divided into four types by systematic cluster analysis method based on the differences of their lodging resistance.

Key words: Wheat, Lodging resistance, Evaluation method, Path analysis, Systematic cluster analysis

中图分类号: 

• S512.101