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，为生育期显著缩短，结实有所提高，株型向松散趋，穗型则均为棍棒形，株高、穗粒数和千粒重的变品种间不一致。