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运用生物统计方法,连续五年研究了部分小麦品种和部分杂交后代的收获指数及其变化,探讨了不同肥力水平下,收获指数与籽粒产量的关系.结果表明:收获指数在不同品种和不同组合间差异较大;主穗茎收获指数可代表全株收获指数:株高是影响收获指数的主要因素之一;收获指数在中肥下最高,高肥次之,低肥最低,但有些品种的收获指数和籽粒产量可随肥力水平的提高而增加;收获指数可以遗传。把收获指数作为重要性状,筛选出了高产、高收获指数的新品种305—1和315—1。
Using the method of biostatistics, the harvest index and its variation of some wheat varieties and some hybrid progenies were studied for five years in a row, and the relationship between the harvest index and the grain yield was discussed under different fertility levels.The results showed that the harvest index varied with different varieties and combinations The main ear harvest index can represent the whole plant harvest index: the plant height is one of the main factors that affect the harvest index; the harvest index is the highest under the fertilizer, followed by the high fat and the lowest is the lowest, but some varieties Harvest index and grain yield increase with increasing fertility level; harvest index can be inherited. Taking harvest index as important trait, new varieties 305-1 and 315-1 with high yield and high harvest index were screened out.