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选用稻瘟病持久抗性载体品种三黄占 2号、三芦占 7号 ,稻瘟病抗性品种外选 35和矮三芦占等 4个品种 ,与广A、博A两个不育系配组 8个组合 ,重复进行了详细的稻瘟病抗谱测定、数量抗性测定以及不同病区田间异地同步抗性鉴定 ,结果表明 :(1 )三黄占 2号、三芦占 7号携带的稻瘟病持久抗性基因能在三系杂交稻组合中表达出来 ,杂交稻的持久抗性育种是可能的 ;(2 )与常规稻类同 ,数量抗性和不同病区田间异地同步抗性可作为区分杂交稻是否具有持久抗性的指标 ;(3)数量抗性与不同病区田间异地同步抗性紧密正相关 ,数量抗性可作为区别高质量抗性组合是否具有持久抗性的重要依据 ,可以应用温室人工鉴定的数量抗性指标开展稻瘟病持久抗性育种探索
Three resistant cultivars, Sanhuangzhan 2, Sanluzhan 7, Blast resistant varieties 35 and Dwarf Sanluomai 4 were selected as the long-resistant vector cultivars. The results showed that: (1) Sanhuangzhan No.2 and Sanluzhan No.7 were carried by the combination of eight combinations, repeating the detailed blast resistance spectrum determination, quantitative resistance determination and field heterogenous synchronization resistance identification in different ward areas. The long-lasting resistant genes of blast can be expressed in the three-line hybrid rice combinations. It is possible that the resistant hybrid rice will be resistant to long-term resistance. (2) The same resistance as the conventional rice, As an index to distinguish whether the hybrid rice has a long-lasting resistance; (3) the quantitative resistance is closely related to the off-site synchronous resistance in different wards, and the quantitative resistance can be used as an important basis for distinguishing whether the high-quality resistant combination has long-lasting resistance , We can apply the quantitative index of greenhouse artificial identification to carry out long-lasting resistance breeding of rice blast