湖北省水稻主栽品种对白叶枯病菌的抗性鉴定

袁斌+张舒+吕亮+常向前+杨小林

摘要：采用8个白叶枯病菌（Xanthomonas oryzae pv. oryzae）小种接种鉴定72个湖北省主栽水稻品种对白叶枯病菌的抗性。鉴定结果显示，能够同时抗这8个菌株的仅有鄂粳优775;能抗其中7个菌株的仅有广两优476;能抗其中6个菌株的有5个品种;14个品种能抗其中的5个菌株;9个品种能抗其中的4个菌株;还有33个品种只能抗其中的2～3个菌株;甚至有两个品种对所有菌株都感病。8个鉴定菌株表现的致病性差异大，FuJ的致病性最强，仅鄂粳优775一个品种对其有抗性;YN1也有很强的致病力，仅两个品种表现对其有抗性;16个品种表现对ScYc-6有抗性;其他菌株都有50%以上的品种表现出抗性。鉴定结果表明，湖北省主栽水稻品种普遍对白叶枯菌病的抗性不好，尤其是对FuJ和YN1菌株缺乏抗性，这种状况导致水稻白叶枯病构成了湖北省水稻生产的潜在威胁，也是近两年湖北部分地区白叶枯病成片发生，造成水稻绝收的主因。

关键词：水稻;白叶枯病菌;抗病品种

中图分类号：S432.4+4        文献标识码：A        文章编号：0439-8114（2015）23-5912-03

DOI：10.14088/j.cnki.issn0439-8114.2015.23.029

Identification of Resistance to Xanthomonas oryzae pv.oryzae in Rice Cultivars

in Hubei Province

YUAN Bin，ZHANG Shu，LV Liang，CHANG Xiang-qian，YANG Xiao-lin

（Institute of Plant Protection，Soil and Fertilizer，Hubei Academy of Agricultural Sciences/Key Laboratory of Integrated Management of Crops of Central China，Ministry of Agriculture，P. R.China/Hubei Key Laboratory of Crop Disease，Insect Pests and Weeds Control，Wuhan 430064，China）

Abstract：Using eight races of bacterial blight（Xanthomonas oryzae pv. Oryzae），72 rice cultivars in Hubei were inoculationed for bacterial blight resistance. The results showed that Egengyou 775 could resist all eight races; Guangliangyou 476 could resistant seven strains; five cultivars could resistant six strains;14 cultivars could resistant five strains;nine varieties could resistant to four strains; and 33 species could resistant to 2～3 strains; specially，two varieties were susceptible to all strains. The virulence of FuJ was the strongest， only Egengyou 775 could resistance to it; YN1 also had a strong virulence， only two varieties showed its resistance; only 16 varieties were resistant to ScYc-6; more than 50% of the varieties showed resistance to other strains. The results of identification showed rice cultures in hubei were bad of bacteria blight，especially， the resistant cultures for FuJ and YN1 were lacking，which leads to bacterial blight poses a potential threat to rice production in Hubei Province.

Key words： rice; Xanthomonas oryzae pv. oryzae; resistance cultivar

水稻白叶枯病（Xanthomonas oryzae pv. oryzae）是水稻三大病害之一，在湖北曾经造成水稻严重减少[1]。近年来，以抗病品种为主的综合防治措施的推广，使湖北省白叶枯病发病面积大大减少，但是仍有部分地区时常暴发造成损失。因此采用抗病品种防治白叶枯病依然是防治水稻白叶枯病发生的重要措施，掌握湖北省水稻主栽品种对白叶枯病菌的抗性情况，有利于水稻品种的合理布局并利于该病的防治[2，3]。

1  材料与方法

1.1  水稻品种与种植

2013和2014年收集近年来湖北省各主要稻区水稻主栽及后备品种72个。供试品种种植于湖北省农业科学院植保土肥研究所南湖试验田，单本栽插，每品种（系）种植1行，每行种植10株，株行距分别为16 cm和25 cm，3次重复，肥水管理与大田生产相同，接种抽出完整剑叶。endprint