Genetic variations in Spanish isolates of Phaeomoniella chlamydospora, the causal etiological agent of Petri disease of grapevine

摘要: Petri disease is currently considered as one of the most important mycoses grapevine wood in terms its incidence and extent, causing young decay numerous vine-producing areas worldwide. One causal agents ascomycete Phaeomoniella chlamydospora (W. Gams, Crous, M. J. Wingfield & Mugnai) Crous W. Gams. Recently, several studies focusing on genetic variability this species have reported that low. However, intraspecific characterisation P. by other than molecular means are scarce. In study, 57 Spanish isolates were characterised integrating data from morphological, pathogenic, cytological ecological techniques. It was found there a relationship between high polymorphism these (melanised, intermediate albino cultures), number groups, distinguished their nuclear number, pathogenicity or survival soil. The non-melanised phenotypes associated with less virulent strains, generally possessing mono- binucleate hyphae low soils, whilst melanised, multinucleate more survived up to 12 months soils under laboratory conditions. Using criteria distinguish forms pathogen, should make it easier detect hypovirulent non-pathogenic advance our understanding biology fungus, especially modes dispersal range field. adoption also characterise variations those cases where methods do not reflect them, chlamydospora.