一、引论在多年生禾谷类作物上建立的第一诱导和第二诱导概念,已得到广泛的推广。小麦春化和光周期效应就是较一般情况的特例。目前,关于小麦春化和光周期效应的研究已有大量报道,其结论一般为;低温的作用在于降低其它促进开花的限制因子的影响;温度对潜在产量的影响是在生长早期;当光期延长时,会 I. INTRODUCTION The first and second induction concepts established on perennial cereal crops have been widely disseminated. Wheat vernalization and photoperiod effects are more special cases than the general case. At present, there are a lot of reports about the vernalization and photoperiod of wheat. The conclusion is generally that the effect of low temperature is to reduce the influence of other restriction factors that promote flowering; the influence of temperature on the potential yield is in early growth; When