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广占63-4S是中国水稻(Oryza sativa L.)两系育种中使用较多的优良不育系。随着繁殖世代的增加,一些地方出现不育系转育温度漂变的现象,给制种带来了风险。试验以X公司使用的广占63-4S为基础材料,利用冷水串灌技术提纯出转育温度低于23℃的株系。
Guangxian 63-4S is an excellent CMS line used in two-line breeding of Chinese rice (Oryza sativa L.). With the increase of breeding generations, the temperature drift of the sterile line appears in some places, posing a risk to the seed production. Test to X company uses widely accounted for 63-4S as the base material, the use of cold water string irrigation technology purification of the temperature below 23 ℃.