野生稻是水稻抗性育种的宝贵遗传资源,目前世界许多国家对野生稻资源的搜集、评价和利用都十分重视.稻白叶枯病是水稻三大病害之一,几十年来国内外学者虽经多方努力,但迄今仍无较理想的防治药剂,惟有抗病品种既可防治病害,又简而易行,并不污染稻谷和农业环境,有利于维护稻田生态平衡.为了发掘更多更好的新抗源,使抗性基因多样化,1980年来,我们特对广西普通野生稻进行了抗白叶枯病测定.供测材料共1630份.在测定中,以田间人工接菌为主,全部经过初筛和复筛,有的还进行了多菌株稳定性测定.每次测定均加入栽培稻我国通用抗感对照种IR26和全刚30号.据测定结果:①不同来源普通野生稻间的抗性存在着明显的差异,同一类型不同分布地,同一分布地不同类型、甚至同一分布地同一类型野生的抗性也不尽相同.按初步统计,抗性好的81份,占4.97%;抗性较好的247份,占15.15%;较感病的256份,占15.71%;感病的1046份,占64.17%.③所发掘的抗性材料,因各自存在有不同的自然杂交现象,故这些材料并非都是一个抗性纯合体.为更好地提供利用,尚需采用花培或连续逐代套袋与再抗性鉴定,以纯合抗源.③野稻叶片太长,抗性也较好,进行抗白叶枯病测定,不宜采用栽培稻现行分级标准.本测定均量叶片病斑长度,且与同日期接菌的IR26作比较,凡比IR26病 Wild rice is a valuable genetic resource for resistance breeding in rice, and many countries in the world attach great importance to the collection, evaluation and utilization of wild rice resources.White-leaf blight is one of the three diseases of rice, although decades of domestic and foreign scholars though After many efforts, but so far there is no ideal control agent, only the disease-resistant varieties can prevent disease, but also easy and does not pollute the rice and agricultural environment, is conducive to maintaining the ecological balance of paddy fields in order to explore more and better Of the new anti-source, the resistance gene diversity, we have special on Guangxi wild rice in the determination of bacterial blight resistance for a total of 1630. In the determination, the field-based artificial inoculation, All of the initial screening and re-screening, and some also carried out multi-strain stability determination.Each determination were added to China’s common cultivars resistant varieties IR26 and Quan Gang 30. According to the determination results: ① different sources of common wild rice Of the same type of different distribution, the same distribution of different types, even the same distribution of the same type of wild also vary resistance.According to preliminary statistics, 81 were good resistance, accounting for 4.97% Good resistance 24 7, accounting for 15.15%; 256 susceptible, accounting for 15.71%; 1046 susceptible, accounting for 64.17%. ③ The excavated resistant materials, because of their different natural hybridization phenomenon, so these materials are not Are a resistance homozygotes.To provide better use, still need to use flower culture or successive generations of bagging and resistance identification, homozygous anti-source .③ wild rice leaves are too long, the resistance is better, For the determination of resistance to bacterial leaf blight, it is not appropriate to adopt the current grading standard of cultivated rice.The average leaf spot length of this test was compared with that of IR26