The SPB, SS, SSB, PBD showed high effect of genotype and low effect of seeding date whereas DPB displayed high effect of seeding date.

• 2)现存一次枝梗数、现存二次枝梗数、现存颖花数、一次枝梗分化数4个指标的基因型值较大，播期效应值较小；一次枝梗退化数播期效应值较大。