谷子光温敏雄性不育系A2高产繁育技术研究

Research of High Yield Propagation Technique for Photo-thermo-sensitive Genic Male Sterility of Foxtail Millet

光温敏雄性不育现象是作物杂种优势利用的新途径之一,谷子光温敏两系杂交种的应用使得谷子产量大幅度提高。目前,主要杂交谷子品种的母本是谷子光温敏雄性不育系A2。采用四因素(播期、密度、底肥、追肥)正交试验设计,在海南省三亚市对其南繁高产技术进行了研究。结果表明:除播期对不育系A2产量有极显著影响外,其他因素对产量影响均不显著。正交试验产量结果显示,12月5日播种、种植密度60万株/hm^2、底肥施用量150.0 kg/hm^2、追肥施用量150.0 kg/hm^2条件下,谷子光温敏雄性不育系A2繁种产量最高,达到了438.30 kg/hm^2。本研究结果可为不育系A2南繁高产技术的制订提供基础数据。

The phenomenon of photo-thermo-sensitive genic male sterility（TGMS） is one of the new ways to use heterosis, millet yield is greatly enhanced with the application of millet photo-thermo-sensitive two-line hybrid. At present,the male sterility of mainly varieties of hybrid millet is photo-thermo-sensitive genic male sterility A2. In this research, the high yield propagation te chnique in Sanya City of Hainan Province had been studied with the orthogonal design of four factors（sowing time,density,fertilizer,topdressing）. The results showed that sowing date had a significant influence on yield. However,density,base fertilizer and top dressing were not significant. Orthogonal experiment results showed that the best parental reproduction of the male sterile line A2 was the combination A3B2C2D2,namely sowing period was December 5,the density was 600 000 plants/hm-2,the base and topdressing fertilizer were each 150.0 kg/hm-2,under the condition the yield reached 438.30 kg/hm-2. This will provide data for the A2 parental reproduction.