short-period

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