摘要
研究了4个籼稻品种对稻瘟病稳定菌系闽选1号或闽选4号的抗性遗传.结果表明,在以感病品种矮南特为杂交亲本之一的情况下,对闽选1号菌系的抗性,菲一、双抗77015受1对显性上位基因和1对隐性基因控制;双抗77023受2对显性重叠基因控制;IR29受1对显性基因控制.对闽选4号菌系的抗性。菲一由1对显性基因支配;双抗77015由1对显性上位基因和1对隐性基因支配.
Four blast resistant plant materials were investigated with a view to determine their modes of inheritance when inoculated with the virulent pathogenic strains,Minxuan No.1 (ZA_1)or Minxuan No.4(ZB_(15))of Pyricularia oryzae Cav..The performances of F_1,F_2, F3 and BC_1 generations revealed that under the condition of crossing with the susceptible donor,Ainante,for Minxuan No.1,the resistance of Feiyi and Shangkang No.77015 were regulated jointly by a pair ofepistatic dominant and a pair of recessive genes,while that of Shangkang No.77023 was controlled by two pairs of duplicated dominant genes.As for IR29,a pair of dominant genes executed the role.For Minxuan No.4,there were a pair of dominant genes in Feiyi.In Shangkang No.77015,a pair of epistatic dominant and a pair of recessive genes existed.The problems of incorporating resistant genes into cultivars and hybrid rice varieties that were susceptible to blast disease were also discussed.
关键词
籼稻
品种
抗瘟性
遗传
indica rice
blast resistance
inheritance
