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试验以不同类型的小麦杂交组合后代为材料，探讨在异质竞争条件下植株形态性状与产量的关系，并以此对小麦高产群体株型结构选择指标进行分析。结果表明：植株各节间在异质竞争条件下对产量性状的影响作用不同。株高构成指数（１）的高低可以较好地反映群体产量的高低。Ⅰ值较高的组合有利选出高产类型。
In this study, the relationship between plant morphological traits and yield under heterogeneous competition was investigated using different types of offspring of wheat cross combinations as materials to analyze the plant type structure selection index of high-yielding wheat population. The results showed that the effects of different plants on the yield traits under different competition conditions were different. Plant height index (1) can better reflect the level of population output. The combination of higher values of I favors the selection of high yield types.