各类小麦品种不同春化时间与抗寒性的关系

Relationship of Vernalization Time with Cold Hardiness for Different Wheat Varieties

选择强冬性、冬性、半冬性、春性不同类型中五个代表性小麦品种进行不同春化时间、不同低温处理试验,探讨小麦春化反应与抗寒性的关系。结果表明:不同类型品种抗寒性差异较大;低温春化特性与抗寒性是同一外界条件(即低温)诱导的品种所具有的两种遗传特性,要求较长低温春化时间的品种,抗寒性不一定强,但抗寒性强的品种,要求的春化时间一般较长,春化有利于抗寒性的形成;同一品种不同春化时间处理后幼苗的抗寒性不同,随着春化时间的延长,抗寒性增强,春化时间适宜者抗寒性最强;但同时也发现春化时间超过适宜范围后,抗寒性又下降这一现象目前尚未见报道。

Five wheat varieties represented the strong winterness, win different vernalization times and low temperature to examine the rela showed that the cold hardiness for different varieties had great differen terness, tionship ces. The semi-winterness and springness of wheat vernalization response form respectively were treated by with cold hardness. The results vernalization and the cold hardiness of wheat characteristics under low-temperature. The wheat seedlings had a different cold hardiness under the condition of different vernalizati two on ti wheat varieties which need a long vernalization time could not be confirmed as strong cold hardiness varieties. While the wheat varieties which had strong cold hardiness need a long vernalization time. The vernalization was beneficial to forming of the cold hardiness of wheat. The cold hardi- ness was enhanced as the vernalization time was prolonged, while it was the strongest at the appropriate vernalization time. If the vernalization time was too long, the cold hardiness would descend.