【摘要】 <正> 在作物育种工作中,新品种(系)的出现速度是与育种材料的世代进程密切相关的。小麦就地夏繁就是在育种过程中,把在正常季节生长和收获的小麦,在当地条件下于当年再繁殖一代,以加速育种材料的世代进程,提早育成新品种。现根据我们的初步实践,就小麦就地夏繁中几个问题,谈一些看法。 一、小麦生长发育与我省夏季环境的主要矛盾更多还原

【Abstract】 This article, based on the theory of stage development, discussed the problem on how to make possible the development of wheat through different growing stage under the summer weather condition.On the vernalization experiment, it was shown that the green seedlings of three different types of wheat varieties completed their stage development of vernalization only 10, 25 and 35 days under the low temperature of 1—3℃ respectively. And with the winterness properties of the wheat increased, the developmant of vernalization were most likely to be completed in the green seedling stage.Experimental results also indicated that the summer-propogated wheat in the photostage was developed in the natural condition, and the high temperature might be the major factor influencing the wheat development during this stage. The high temperature caused damaged to the summer-propogated wheat was varied to different varieties and in diffenent development stage. In general, the high-temperature sensitive spring variety was injurious seriously during the heading stage. It also showed that by taking some methods, such as irregating with well-water, covering the light reflected materials were also benefit to the wheat development in this stage.In addition, it was also discovered that the summer-proagated wheat is a perennial root Plant.更多还原