| genetic similarity among cercospora apii-group species and their detection in host plant tissue by pcr/rflp analyses of the rdna internal transcribed spacer (its). | the objective of this study was to determine the genetic relatedness among the cercospora and pseudocercospora species closely related to cercospora apii by using a polymerase chain reaction/restriction fragment length polymorphism (pcr/rflp) analysis of the internal transcribed spacer (its) region. a single pcr fragment (about 550 bp) was obtained from all cercospora species categorized as the c. apii-group, pseudocercospora purpurea, pseudocercospora conyzae, and pseudocercospora cavarae. cerc ... | 2000 | 12483593 |