Genetic relationships as assessed by molecular markers and cross-infection among strains of Colletotrichum gloeosporioides.
Hayden H. L., Pegg K. G., Aitken E. A. B., Irwin J. A. G.
Author Affiliation: Cooperative Research Centre for Tropical Plant Pathology, The University of Queensland, Qld 4072, Australia.
Australian Journal of Botany 42 : 9-18
Abstract : Morphological characterization allows isolates of C. gloeosporioides [Glomerella cingulata], C. musae and C. acutatum to be identified only to species level. Pathogenicity tests and random amplified polymorphic DNA (RAPD) markers distinguished a mango biotype of G. cingulata from 8 other isolates of G. cingulata obtained from 5 different fruit species. Using these procedures, it was also possible to distinguish C. acutatum and C. musae both from each other, and from the G. cingulata isolates. In cross-infectivity studies, isolates of G. cingulata displayed a wide host range with the exception of isolates from mango, which were highly virulent on mango only. Teleomorphic isolates of G. cingulata were clustered together by RAPD analysis. The existence of a biotype of G. cingulata which shows specialization to mango is demonstrated.