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本试验涉及的 N_(51)、N_(67)和矮生象草中,以 N_(51)对短日处理最敏感,9小时/天短日处理3～4周能有效地诱导N_(51)抽穗开花;N_(51)是短日作物,也是喜温作物,一般短日处理开始到抽穗期需>0℃的积温1058℃左右。象草的有效穗由分蘖穗和分枝穗组成,由于单侏中分蘖穗和分枝穗发育程度的差异及群体中单侏间的差异,致使 N_(51)群体的有效散粉期可达30天左右,花粉高峰可持续2周左右;经短日处理诱导抽穗的象草的有效花粉率可达77%以上,可用作美洲狼尾草不育系的良好的恢复系,以进行美洲狼尾草和象单的种间杂种的制种。
The N_ (51), N_ (67) and dwarf weeds were most sensitive to short-day treatment with N_ (51) and short-day treatment with 9 h / ) Flowering and heading; N_ (51) is a short-day crops, but also the hi-temperature crops, the general short-day processing start to the heading of> 0 ℃ accumulated temperature 1058 ℃ or so. The effective grass panicles consisted of tiller and branch spikes. Due to the differences in the developmental level of tillers and branches in single juveniles and the differences in single juveniles, the effective sowing period of N_ (51) populations could reach 30 The pollen peak can last about two weeks. The effective pollen rate of weedy plants induced by short-day treatment can reach more than 77%, which can be used as a good restorer line of the Pennisetum melanogaster male sterile line for the American wolf Seeds and elephants species of interspecific hybrids.