研究2,4-D首次处理时期对小麦×玉米诱导小麦单倍体效率的影响,将2个小麦基因型与1个玉米基因型进行远缘杂交,远缘杂交后,在2,4-D首次处理的时期上采用了4种不同的处理。结果表明,T1处理(授粉后1 h首次进行2,4-D穗下节注射子房滴注)的诱导效率明显优于其它处理,其单倍体植株获得率和获得效率分别为37.50%和3.33%。 To study the effect of 2,4-D first treatment on wheat haploid efficiency induced by wheat × maize, two wheat genotypes were crossed with one maize genotype by distant crosses. After distant hybridization, Four different treatments were used during the first treatment. The results showed that the induction efficiency of T1 treatment (the first injection of 2,4-D spikelets in the inferior ovary 1 h after pollination) was significantly better than other treatments, and the haploid plant yield and efficiency were 37.50% and 3.33%.