选择冬性和春性的小麦品种作亲本进行杂交,是小麦育种工作中常用的一种方法。由于冬性小麦需要在较低温度下(0～5℃),经过较长时间(25～50天),才能顺利完成春化阶段,在我区的春播条件下,往往由于通不过春化阶段或通过极为缓慢,以致不抽穗、延迟抽穗或抽穗很困难,所以一 The winter wheat and spring wheat varieties are selected as the parents for hybridization, which is a commonly used method in wheat breeding. As winter wheat needs to be at a lower temperature (0 ~ 5 ℃), after a long period of time (25 ~ 50 days) in order to successfully complete the vernalization stage, in our spring sowing conditions, often due to pass vernalization stage Or through very slow, so that no heading, delayed heading or heading is very difficult, so one