生育期是作物的一个重要遗传特性,其长短是受遗传性和光温条件所制约的。改变光温条件可以使生育期发生变化,如水稻在同年播种实验中,在某个播期某些品种的抽穗期范围可延长4个月之久;在人工光温条件处理时也有类似情况。这种处理当代生育期变化的现象,有人称之为“种群的分解”或“种群变异性”或“光周期反应规范的隐藏的变异性”。然而对于这种变异的遗传效果则研究甚少。近年来异地、异期繁殖已在研究工作中广泛被采用,异地、异期繁殖改变了作物生育的光温条件,这种改变能否引起生育期的变异,这种变异能否遗传是值得注意的一个问题,它 The growth period is an important genetic trait of crops whose length is controlled by heredity and light and temperature. Changes in light and temperature conditions can make the growth period changes, such as rice sowing experiments in the same year, some sowing date range of some sowing date extension of 4 months long; artificial light and temperature conditions are also treated with a similar situation. This phenomenon of dealing with the changes of the contemporary reproductive stage has been called “population breakdown” or “population variability” or “hidden variability of the photoperiodic response norm.” However, there is little research on the genetic effect of this mutation. In recent years, off-site, heterosexual reproduction has been widely used in research work, off-site, heterotrophic breeding has changed the crop’s light and temperature conditions, this change can cause growth period variation, genetic variability is worth noting One problem with it