育种开始,首先要制定育种目标。在育种工作中要根据育种目标决定育种材料的收集、选留和淘汰,以及杂交亲本的选配、杂种后代的选择和育种的方法。如果育种目标不正确或者不具体,将会导致选材错误,育种方法和规模不恰当,最后得不到成果。由于人们对品种的要求,各类作物情况不一, Breeding began, we must first develop breeding goals. In the breeding work, the collection, selection and elimination of breeding materials should be decided according to breeding objectives, as well as the selection of hybrid parents, the selection of hybrid offspring and breeding methods. If the breeding goal is incorrect or not specific, it will lead to material selection errors, unsuitable breeding methods and scale, and finally no results. Due to the variety of people’s requirements, different types of crops in different situations,