关键词: 杂交小麦, BS系列不育系, 制种适应性

Abstract:

Efficient seed production techniques are the key factors that affect the industrialization of hybrid wheat. The exploration of suitable seed production area is an important part of seed production technology research and the improvement of seed production. The traditional production area of BS series hybrid wheat based on photo-thermo-sensitive sterility was more single and concentrated in the Fuyang area of Anhui Province. In order to increase the seed production areas of hybrid wheat and improve the technical level of seed production, the climate of Weinan area was analysed and compared with Fuyang the traditional wheat seed production area in this study. The results showed that the average temperature of growing wheat in Weinan is lower than that of Fuyang by 1.3℃ and the difference of average temperature in important period of fertility transfomation is less than 1℃; the duration of possible sunshine are similar in the two areas; the precipitation in the key period of wheat seed production was significantly reduced (41.7% lower than that in Fuyang area), which was suitable for seed production. On this basis, we conducted the fertility test and seed production of BS series photo-thermo-sensitive genic male sterile lines in Weinan, Shaanxi Province. The results showed that the majority of BS lines in this area had self-fertility less than 0.5 grains per spike and the sterility rate reached 98%. The average number of outcrossed seedlings per plant reached 14.4 to 20.7 grains per spike, seed production more than 3 000kg/hm ², and seed purity of 95% or more, these are all meet the hybrid wheat seed production requirements. Weinan could be an appropriate alternative area for BS hybrid wheat production.

Key words: Hybrid wheat, BS series of sterile lines, Adaptability of seed production