野生稻抗稻白叶枯病性（Xanthomonas oryzae pv. Oryzae）的评价

 1987-1992年用水稻白叶枯病3个菌系HB84-17、T1和P1，用人工剪叶法鉴定了来自我国江西、湖南、云南、福建、广东、广西6个省（区）及国际水稻研究所、泰国、孟加拉、上沃尔特的13个野生稻种共871份材料的抗性。参试的12份疣粒野生稻（O.meyeriana）全部高抗，斑点（O.punctata）、阔叶（O.latifolia）、小粒（O.minuta）、药用（O.officinalis）、长雄蕊（O.longistaminata）、高秆（O.alta）、普通野生稻（O.rufipogon）和非洲栽培稻（O.glaberrima）等8个种内也有许多编号的抗性颇佳。如药用和长雄蕊野生稻的高抗材料分别占其参试总数的49.8%和38.9%,而普通野生稻中的高抗材料很少。在重复测定的61份包括药用、长雄蕊和普通野生稻3个种中，发现22份材料高抗栽培稻都不能抵御的一个广谱致病菌系P6，其中很可能存在栽培稻所缺乏的新的抗性基因。至于普通野生稻的抗性则表现多种多样，除少数有一致和较稳定的全生育期抗性外，许多材料表现同一编号不同株的 抗感反应各异和同株同生育期抗性异型。本文还讨论了不同染色体组的野生稻种的利用途径。

EVALUATION OF RESISTANCE TO BACTERIAL BLIGHT(Xanthomonas oryzae pv.oryzae)IN WILD RICE SPECIES

Eingt hundred and seventy-one materials including thirteen wild rice species collected from six provinces,Jiangxi,Hunan,Yunnan,Fujian,Guangdong,Guangxi and IRRI,Thailand,Bangladesh,Upper Volta,Were evaluated With three strains of Xanthomonas oryzae,pv.oryzae,HB84-17,T1 and P1,using artificial clipping method in 1987-1992.All of the twelve Acc.No.of O.meyeriana were highly resistant to the three strains.Many Acc. No of O.punctata,O.latifolia,O.minuta,O.officinalis,O.longistaminata,O.alta,O.rufipogon and O.glaberriama showed very resistant also.A few materials of O.rufipogon were high resistant only.Percentages of high resistant ones in O.officinalis and O.longistaminata were 49.8% and 38.9%,respectively.Twenty-two of sixty-one materials tested repeatedly were high resistant to a broad spectrum pathogenitic strain,P6.Some of them might have new resistance genes,Which Were absent in cultivated rice.The performance of resistance was various in O.rufipogpon.Approach of utilization of wild rice species with different genomes is discussed also.