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Factors affecting the assessment of resistance of potatoes to gangrene (Phoma exigua var. foveata)
Author(s) -
ROGERS W. G.,
KILLICK R. J.
Publication year - 1975
Publication title -
annals of applied biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.677
H-Index - 80
eISSN - 1744-7348
pISSN - 0003-4746
DOI - 10.1111/j.1744-7348.1975.tb00494.x
Subject(s) - biology , inoculation , exigua , phoma , horticulture , botany , gene , genetics , spodoptera , recombinant dna
SUMMARY Three experiments designed to elucidate the effects and interactions of different inoculation methods, inoculation positions, strains of Phoma exigua var. foveata and clones of potato tubers inoculated were analysed using as data dimensions of the lesions and a more general surface score. The assessment of susceptibility was affected by all these factors. The ranking of varieties for resistance altered considerably depending upon whether the surface area or the depth of lesions was considered. Derivation of more complex scores combining these measurements reduced the relative genetic component and hence would be of no value to potato breeders.