温光互作对不同生态型小麦品种发育效应的研究 Ⅰ.品种最长、最短苗穗期及温光敏感性分析

A Study on the Combined Effects of Temperature and Light on the Development of Wheat Cultivars Ⅰ.Analysis of Maximum and Minimum Seedling-Heading Stages and Sensitivity to Temperature and Light

试验在温光互作设计下,通过品种苗穗期(出苗—抽穗)对温光反应的变异分析看出,不同类型品种在不同温光组合下,不仅存在着最短与最长的苗穗期,而且不同类型品种,对温光反应类型不同,春性类型品种对春化基本无反应而对光长反应敏感;强冬性类型品种对春化反应敏感,而对光长必须在一定春化量基础上才表现敏感,并且具有短日代替春化效应。一般冬性类型品种(主要指黄淮麦区的半冬性过渡类型)多为温光兼敏性,无短日春化特性。

The experiments were carried out on the combined effects of Temperature (T) andDaylength (D) on the development of wheat cultivars. The results of variance analysison the reactions of cultivars to T & D showed that the different types of cultivars notonly had the maximum and minimum length of development but also respondeddifferently to T and D. Spring type varieties gave no response to vernalization, but re-sponded strongly to long photoperiod, and strong winter cultivars were characterizedby sensitivity to vernalization but the responses to photoperiod could only be expressedon the basis of definite extent of vemalization and there existed that short photoperiodhad the same effect of vernalization. Most winter cultivars were sensitive to both T andD, but it was not characterized by the substitution of short photoperiod tovernalization.