The characters of SP1 variation plants at maturity stage also appeared big changes.SP1 variation plants had short growing period, high seed setting rate, loose plant-type and clavated spike-type.

成熟期SP1代变异株性状也有较大变化，表育期显著缩短，结实率有所提，株型向散趋势发展，型则均表棍棒形，株、数和千重的变化品种间表不一致。