Mycelial Compatible Groups of the Sclerotium rolfsii Isolates and Comparison of Morphological and Pathogenic Characters

MERT F., yaşar i.

Journal of Turkish Phytopathology, vol.48, pp.1-6, 2019 (Peer-Reviewed Journal)

  • Publication Type: Article / Article
  • Volume: 48
  • Publication Date: 2019
  • Journal Name: Journal of Turkish Phytopathology
  • Page Numbers: pp.1-6
  • Çanakkale Onsekiz Mart University Affiliated: Yes


Sclerotium rolfsii Sacc. is a polifag soil-borne fungal pathogen. This research aims to find out the mycelial compatible groups (MCG) of S. rolfsii, the differences in pathogenicity and morphological characters. All isolates collected from diseased green beans in Çanakkale during September, 2015. Twenty seven isolates in total were paired with each other in potato dextrose agar (PDA) to determine mycelial compatible groups (MCG). Pairings were scored as mycelial compatible if sclerotia formed in the interaction zone, however pairings were scored as mycelial incompatible if a barrier occurred. Three MCGs were determined. There were statistical differences in means of mycelial growth, the number and diameter of sclerotia produced. The correlation analysis exhibited that there was a negative correlation between sclerotium number-mycelial growth and sclerotium number and sclerotium diameter; however there have been positive correlation between mycelial growth and sclerotium diameters. All isolates were found to be highly virulent on tested bean seedlings. This research shows that there is phenotypic variation among isolates of S. rolfsii.