18份广东香蕉种质对枯萎病的抗性评价

【背景】香蕉枯萎病是世界性的香蕉毁灭性病害,尚无有效药剂防控,筛选抗病品种是目前理想的防治方法。【方法】采用组培苗伤根接种法,研究了18份香蕉种质对香蕉枯萎病菌4号生理小种的抗性水平,并根据病情指数进行抗性分级。【结果】在供试的18份香蕉种质中,2份(东莞大蕉、抗枯5号)高抗,2份(碧盛、大丰)抗病,3份(抗枯1号、粉杂、农科1号)中抗,7份(粤优抗1号、广东-741、泰国B9、大蕉、台湾8号、海贡蕉、威廉斯8818)感病,4份(巴西、广东2号、广粉1号、粉蕉)高感。【结论与意义】不同香蕉种质对香蕉枯萎病菌4号生理小种的抗病性存在较大差异,本研究初步筛选出7份抗枯萎病的香蕉种质,为香蕉枯萎病抗病育种提供了依据,为病区种植香蕉品种提供了有效参考。

Assessment of 18 banana germplasms for resistance to Fusarium wilt race 4

Background] Fusarium is a worldwide banana devastating pathogenic fungus. Since there is no effective drug to control it, screening of resistant banana varieties is the best prevention method.Method] Using eighteen banana germplasms were tested for resistance to Fusarium oxysporum f.sp. cubense race 4 by root injury inoculation of seedlings grown as tissue culture.Result] The results showed that 2 of the 18 germplasms were highly resistant, 2 were resistant, 3 moderately resistant, 7 susceptible, and 4 highly susceptible.Conclusion and significence] Resistance levels to F. oxysporum cubense race 4 greatly varied among these banana germplasms. The seven resistant germplasms can potentially be used for cultivation of banana resistant varieties.