【摘要】 应用粳型广亲和系M503与籼型白叶枯病原始抗源DV85杂交,杂种F2代选择偏粳型的抗性植株进行花培,仅用二年半时间育成的粳稻衍生糸ZD92147和籼稻衍生系ZD92152与感病品种沈农1033、成株期抗白叶枯病的CBB3、CBB4杂交,其杂种后代用致病力较强的白叶枯病菌株93-1在苗期接种,经遗传分析认为它们均带有一对隐性的Xa-5全生育期白叶枯病抗性基因,从而进一步证实作者提出的籼粳稻间转育白叶枯病隐性抗性基因的育种新方法是快速有效的。更多还原

【Abstract】 A rice (Oryzae sativa L)-indica bacterial blight (BB) resistant resource DV85 was crossed with japonica wide compatiblity variety M503, and it’ s F2 resistant japonica-biased plants were selected in the field to be extracted anther for in vitro culture. A jdponica derived line ZD92147 and an indica derived line ZD92152 were breeded by the method in two and a half year. These two lines were crossed with a BB susceptible variety Shennong 1033. CBB3 and CBB4 which have BB adult resistant genes Xa-3 or Xa-4. Their hybrid progenies were innoculated by a stronger BB pathogen 93-1 in seedling stage and the results showde that the resistant genes of the two derived lines were all controlled by a recessive gene Xa-5 which expressed resistance in all the rice growing stage. This also indicates anther cultural technique is a more rapid and efficient way to transfer BB resistant genes in wide crosses.更多还原