摘要
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。
At different levels of soil fertility, the harvest index (HI) in wheat and its variation, the relationship between HI and the grain yield (GY) were studied by the means of biostatistic method. The results showed that, there was a great difference of HI among the varieties or crosses; the whole-plant HI could be substituted with the HI of mother stem; the height of wheat plant was one of the major factors affecting the HI; the HI of varieties changed with the different levels of soil fertility,the highest HI was ottained at the middle level of soil fertility,the second at the high level and the lowest at the low level of soil fertility, however, the HI or GY of some varieties increased with the increase of soil fertility; HI could be inherited. Two new lines 305-1 and 315-1 both with the high HI and GY were obtained by using HI as one of the important characters in selecting.
出处
《西南农业学报》
CSCD
1989年第2期27-31,共5页
Southwest China Journal of Agricultural Sciences
关键词
小麦
育种
收获指数
Wheat
Wheat breeding
Harvest index
Grain yield
Varieties
Sichuan
