Pathogenic and genetic variability among Colletotrichum lindemuthianum isolates of different geographic origins

The pathogenic and genetic diversity of Colletotrichum lindemuthianum isolates collected from a total of 10 Central and South American, European and African countries were characterized using common bean differential cultivar pathogenicity tests and amplified fragment length polymorphism (AFLP) anal...

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Bibliographic Details
Published in:Plant pathology 2004-10, Vol.53 (5), p.635-642
Main Authors: Ansari, K.I, Palacios, N, Araya, C, Langin, T, Egan, D, Doohan, F.M
Format: Article
Language:English
Subjects:
AFLP
amplified fragment length polymorphism
anthracnose
beans
Biological and medical sciences
Colletotrichum lindemuthianum
Fundamental and applied biological sciences. Psychology
genetic variation
geographical variation
pathogenicity
Phaseolus vulgaris
phylogenetics
phylogeny
Phytopathology. Animal pests. Plant and forest protection
plant pathogenic fungi
provenance
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Summary:The pathogenic and genetic diversity of Colletotrichum lindemuthianum isolates collected from a total of 10 Central and South American, European and African countries were characterized using common bean differential cultivar pathogenicity tests and amplified fragment length polymorphism (AFLP) analysis. On the basis of pathogenicity tests, 74 isolates were attributed to 30 different pathogenic races using the CIAT‐defined binary race‐classification system. Twenty‐one races were restricted geographically, being exclusive to different countries. Race 9 was the most widespread, being detected in four different countries. Cluster analysis of consensus AFLP data generated using three selective AFLP primer combinations grouped 86 isolates (including the 74 subjected to pathogenicity tests) into three clusters (with one isolate as an outlier). This analysis showed that the majority of South and Central American isolates were divided among two clusters, and that the limited number of European and African isolates used in this study were genetically most similar to Central American isolates. Overall, the results of this research showed some associations between the genetic diversity of the isolates and their country of origin, but not between genetic diversity and race classification of isolates.
ISSN:0032-0862
1365-3059
DOI:10.1111/j.0032-0862.2004.01057.x