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Der Einfluss von Umweltbedingungen auf die Reaktion von Eucalyptus‐Klonen nach einer Inokulation mit Cryphonectria cubensis
Author(s) -
Heerden S. W.,
Wingfield M. J.
Publication year - 2002
Publication title -
forest pathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.535
H-Index - 49
eISSN - 1439-0329
pISSN - 1437-4781
DOI - 10.1046/j.1439-0329.2002.00300.x
Subject(s) - biology , inoculation , eucalyptus , cryphonectria , clone (java method) , horticulture , veterinary medicine , botany , virulence , medicine , dna , genetics , gene , biochemistry
Summary The ascomycete Cryphonectria cubensis causes severe losses in Eucalyptus plantations in South Africa and selection programmes for disease tolerance are necessary. The aim of this study was to use two C. cubensis inoculation trials, planted at different locations to assess the disease susceptibility of the clones and the effect of the environment on disease development. These two trials consisted each of 21 Eucalyptus clones ( E. grandis , E. grandis × camaldulensis and E. grandis × urophylla ). All trees were inoculated with a single virulent strain of C. cubensis and lesion widths measured 6 and 12 months after inoculation. Clones differed significantly in their tolerance to C. cubensis . Further, disease severity differed depending on the geographical location of the trial. A significant clone × locality (genotype × environment) interaction was observed. Therefore, screening for disease resistance should take place only in areas where clones will be commercially grown.