该文通过比较三亲本三交与三亲本双交杂种后代的遗传变异特点,并结合北京10号小麦良种选育成功的经典实例分析后认为,双交比三交的选择进程可能早一年,双交的单交F1育种价值较高,双交的复交时机比较灵活机动。又从采用三交比采用双交育成更多的小麦等作物品种的事实出发,同时也指出了双交也具有杂交工作量大的缺点。 By comparing the characteristics of genetic variation among parents and parents of breeders, and combining with the classic example of successful breeding of wheat in Beijing No.10, the author thinks that the selection of parents and relatives may be as early as one year earlier, The single cross bred F1 breeding higher value, double cross the timing of the recovery is more flexible. Starting from the fact that three crosses were used to breed more varieties of wheat such as wheat and wheat, it also pointed out that double crosses also have the disadvantage of heavy workload of hybridization.