成都平原小麦夏繁加代研究

2002年,在成都平原西部海拔704 7m处进行小麦育种材料夏季繁殖试验。几个杂种F4及F5株系的种子经24h4℃低温处理后,在室温下发芽,萌芽后播种。自二叶一心起追肥,每隔5d追1次,共计3～4次;追肥为碳酸氢铵∶磷酸二氢钾=3∶2的0 25%溶液。结果获得了繁殖系数为68 2～110 0,发芽率82 6%～94 7%的F5及F6种子。文中还讨论了低海拔地区进行夏繁在小麦育种中的价值。

Studies on Doubling Seasons of Wheat Planting in Chengdu Plain of Sichuan Province

In May 2002, some F4 and F5 wheat lines were harvested. These F4 and F5 lines of wheat were propagated at Triticeae Research Institute of Sichuan agricultural University, located in Dujiangyan city of Chengdu plain with a low elevation of 7047 metres in June 2002. After the seeds of these lines were pretreated for 24 hours at 4?℃, they were placed in room temperature till germination. The seedlings were transplanted into a minor modified field. The wheat seedlings were fertilized by using 025% solution with 60% NH4HCO3 and 40% KH2PO4 at the seedling stage of 25 leaves. Fertilization was repeated every 5 days for 3～4 times. The range of propagated coefficient of F5 and F6 seeds was 682～1100 times. There was a germination percentage range from 826% to 947%. The usefulness in wheat genetic and breeding by doubling seasons is discussed.