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:采用 De Vogel氏法对福建省花生主产区分离到的 2 54个 A.flavus菌株产毒性进行研究 ,产毒菌株率为 6 2 .6 % ,其中低毒菌株占 4 6 .1%、中毒菌株占 14 .2 %、高毒菌株占 2 .4 %。惠安、莆田、福清、平潭 4个县 (市 )产毒菌株率在 70 %以上。A.flavus菌株致病力研究结果表明 ,产毒菌株比非产毒菌株致病性强 ,差异显著 ;低毒与高毒菌株间致病性差异不显著。同一产毒类型菌株间致病性有强弱分化 ,不同花生品种对 A.flavus菌株的抗性有显著差异 ,致病力×品种互作显著 ,产毒力×品种互作显著 ,产毒力×致病性×品种三者之间互作极显著。说明 A.flavus菌株存在致病力分化现象
DeVgel’s method was used to study the production toxicity of 2 54 strains of A.flavus isolated from peanut main producing areas in Fujian Province. The rate of toxigenic strains was 62.6%, of which 46.1% Toxic strains accounted for 14.2%, highly toxic strains accounted for 2.4%. Huian, Putian, Fuqing, Pingtan 4 counties (cities) toxin production strains in more than 70%. The virulence of A.flavus strain showed that the pathogenicity of the toxigenic strain was stronger than that of the non-toxigenic strain, and the difference was notable. The pathogenicity of the virulent strains was not significant. The pathogenicity of the same strain of toxigenicity was strong and weak. The resistance of different strains of peanut to A.flavus was significantly different. The virulence × breed interaction was significant, the virulence × breed interaction was significant, and the virulence × pathogenic × breed interaction between the three very significant. A.flavus strain shows the existence of pathogenic differentiation