Spread and population structure of Cryphonectria parasitica in a young chestnut orchard in Slovakia

Abstract

The chestnut blight pathogen Cryphonectria parasitica was studied in a chestnut collection composed of both seedlings and grafts derived from selected Castanea sativa and C. sativa × C. crenata trees located in south-east Slovakia, near village Príbelce on an area of approximately 3.5 ha. The study was conducted during eight years (2003–2010). During this period 133 trees were infected, which represents 59.82% of chestnut trees of all chestnut accessions. Based on the phenotype of the fungus culture and the type of cankers in the field, all isolates were determined to be virulent. No hypovirulent strains were found. No vegetative compatibility (vc) type diversity was observed. More than 130 isolates were analyzed for vc and all were in single vc type, which was identical with EU 12. All isolates assayed for mating type were MAT-1. No perithecia were observed. No significant differences were found between the proportion of cankered and dead cankered trees in seedlings and grafts of hybrid origin (C. sativa × C. crenata) and of C. sativa origin. However, particular seedlings and grafts of hybrid origin seemed to exhibit certain resistance to chestnut blight.

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Correspondence to Katarína Adamčíková.

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Adamčíková, K., Kobza, M., Bolvanský, M. et al. Spread and population structure of Cryphonectria parasitica in a young chestnut orchard in Slovakia. cent.eur.j.biol. 7, 267–274 (2012). https://doi.org/10.2478/s11535-012-0009-4

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Keywords

  • Chestnut blight
  • Hypovirus
  • Vegetative compatibility
  • Mating type
  • Castanea sativa
  • C. sativa × C. crenata