作物良种繁育是联系育种和农业生产的纽带。近年来,我们在小麦新品种繁育推广中,针对“三圃制”存在的原种生产周期长,耗资大,费工多,不适应品种日益更新更换形势;单株、株行和株系在选择比较中淘汰率高有好的作用,但对提高种性难以奏效;优中选优使群体急剧缩小,加之人为选择标准掌握不准或对某些性状的高强度选择,有可能导致遗传基础贫乏或性状偏移等问题。为此, Crop breeding is a link between breeding and agricultural production. In recent years, in the promotion and popularization of new varieties of wheat, the long-term production cycle for the original “Sanpu System” is costly and time-consuming, which is not adaptable to the increasingly frequent replacement and replacement of varieties. Individual plants, plants and lines Choose to compare the high rate of elimination has a good effect, but to improve the species difficult to work; excellent selection of the group to make a sharp decline, combined with human selection criteria are not allowed to control or high-intensity selection of certain traits, may lead to a lack of genetic basis Or trait offset and other issues. to this end,