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代异株性状也有较大,现为生育期显著缩短,结实有所提高,株型向松散趋势,型则均现为棍棒形,株高、粒数和千粒重的品种间现不一致。