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粒重是构成小麦产量的三因素之一。为使小麦产量有新的突破,近年来我国各地均十分重视选育具有更高粒重的小麦新品种。我校选育重粒型小麦是以粒大、粒饱为目标,并在特定条件下进行的。这就是清水地区阴雨多,日照不足,特别是灌浆期连阴雨,易导致青干,不利于形成重粒。针对这种情况,我们制定了具体的重粒指标:中秆品种千粒重稳定在50克以上,矮秆品种千粒重稳定在45克以上。我们通过杂交已获得了一批综合性状较好的中秆重粒品系,千粒重为51.0—58.5克,比当地主体品种天选15号提高10克以上,而且多数重粒品系株高在90厘米以下,较天选15号矮20—30厘米。通过实践我们对如何选育重粒小麦有了一
Grain weight is one of the three factors that make up wheat yield. In order to make a new breakthrough in wheat yield, in recent years, great importance has been attached to breeding new wheat varieties with higher grain weight in various parts of China. My school breeding heavy grain type of wheat is large, full grain as the goal, and carried out under specific conditions. This is the rainy area of more than rainy, lack of sunshine, especially the filling of the rainy season, easy to lead to dry, is not conducive to the formation of heavy grain. In response to this situation, we have developed a specific heavy grain index: stalks thousand grain weight stable at 50 grams, dwarf varieties thousand grain weight stable at 45 grams or more. We have obtained a group of middle-stalk heavy grain strains with good comprehensive characters by crossing, the grain weight of one grain is 51.0-58.5 grams, which is more than 10 grams more than that of the local main variety No.18, and the weight of most heavy grain strains is below 90 cm , 20-30 cm shorter than day 15. By practice we have one on how to breed heavy grain wheat