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在小麦品种提纯复壮过程中,认真做好田间选穗的基础上,于室内考种时,用平均穗重作为初选单穗弃留的标准,效果较好.具体做法是:将田间选出的单穗,再选出5%具有代表性的穗,剪去穗基部的茎杆.称重求得平均穗重,然后逐穗称重,凡是小于平均穗重的穗就淘汰;等于或大于平均穗重的穗就当选,分别脱粒装袋.这个方法叫平均穗重决选法,简称穗重法.通过两年来的实践证明,用穗重法决选单穗有以下几点好处:
In the process of purification and rejuvenation of wheat varieties, earnestly select the ear on the basis of the field, in the indoor test species, the average panicle weight as the first choice of single-tassel discarded standards, the effect is better: the specific field is selected: Single spike, and then select the representative of 5% of the ear, cut off the base of the ear spike.Weigh the average weight of panicle obtained, and then weighing each panicle, any less than the average panicle panicles were eliminated; equal to or greater than the average Spike weight of the ear was elected, respectively, threshing bag .This method is called the average weight of spike decision method, referred to as spike weight method.By two years of practice has proved that the use of spike weight method to choose a single ear has the following advantages: