Randomly amplified polymorphic DNA (RAPD) markers were used to assess genetic diversity among 20 isolates of different formae speciales from Fusarium oxysporum. The amount of genetic variation was evaluated by polymerase chain reaction amplified by 3 random primers. All amplifications revealed scorable polymorphisms among the isolates, and a total of 73 band positions were scored by (1/0) method for the three primers used. Genetic distances between each of the isolates were calculated, and cluster analysis was used to generate a dendrogram showing relationships between them. The isolates were clustered into 3 groups which showed no correlation to geographic origin.
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Youssuf A. Gherbawy (1999) studied this question.
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