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用2套鉴别寄主分别对47份A型菌和57份B型菌的致病力进行鉴定,研究表明,不同的柱花草炭疽病菌株致病力不同。应用最大似然法(EML法)对鉴别寄主的致病力鉴定结果进行聚类分析,A型菌可划分成3大小种类型,且其聚类非常紧凑,表现出一定的寄生专化性;而B型菌可划分成2大小种类型,但其在型内分化较为复杂,说明B型菌将来有可能分化出更多的小种类型。从地区而言,无论A型菌还是B型菌均表现为海南菌株的致病力最强,其中尤以昌江和东方的菌株致病力最强。因而对病原变异和进化动态的监测十分必要。
The pathogenicity of 47 strains of A and 57 strains of B were identified by two sets of identification hosts, respectively. The results showed that the pathogenicity of different Colletotrichum strains was different. The maximum likelihood method (EML method) was used to cluster the results of identification of virulence of hosts. A type bacteria could be divided into 3 types and its clustering was very compact, showing some parasitization; The type B bacteria can be divided into two types of species, but its in-type differentiation is more complicated, indicating that the B-type bacteria in the future may differentiate more small species. From the region, both type A and type B bacteria showed the strongest pathogenicity of Hainan strains, especially in Changjiang and Oriental strains the strongest. Therefore, it is necessary to monitor the pathogen variation and evolutionary dynamics.