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代变状也有较大变化,为生育期显著缩短,结实率有所提高,型向松趋势发展,穗型则均为棍棒形,高、穗粒数和千粒重的变化品种不一致。