广西主栽水稻品种抗水稻齿叶矮缩病鉴定

目的]了解广西主栽水稻品种对水稻齿叶矮缩病的抗性水平,为病害的综合防控及抗病育种研究提供理论依据.方法]采用苗期人工接种鉴定方法,结合发病症状和RT-PCR检测结果,明确45份广西主栽水稻品种对水稻齿叶矮缩病的抗性水平.结果]测试的45个主栽水稻品种中未发现对水稻齿叶矮缩病抗病的品种,其中表现高感的有41个,占测试品种的91.11%,表现中感的有4个,占测试品种的8.89%.结论]目前的广西主栽水稻品种对水稻齿叶矮缩病缺乏抗病性.

Resistance of main rice varieties against rice ragged stunt disease in Guangxi

Objective]In order to provide theory basis for integrated control and disease-resistant breeding against rice ragged stunt disease(RRSD),this paper determined the resistance level of Guangxi major rice varieties to RRSD. Method]Using the method of artificial inoculation identification at seedling stage, the resistance levels of 45 Guangxi major rice varieties to RRSD were determined based on their symptoms and RT-PCR detection results. Result]Among the 45 rice varieties, there was no resistant variety against RRSD. The results showed that fourty-one varieties were highly susceptible to RRSD, accounting for 91.11%; four varieties were moderately susceptible, accounting for 8.89%. Conclusion]The current major rice varieties in Guangxi lacks resistance against RRSD.