The analysis of repetitive DNA profiles discriminated between the very similar species P. cryptogea and P. drechsleri. It also supported the heterogeneous status of P. megasperma by differentiating the soybean isolates. In contrast, complete homogeneity was observed among profiles from 12 isolates of P. parasitica, including eight isolates from tobacco. It is suggested that, because of its simplicity, the method might be useful, not only in investigating taxonomical problems, but also for identification purposes
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Franck Panabières (1989) studied this question.