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The identification and fitness of virulent potato cystnematode populations (Globodera pallida) selected on resistant Solarium vernei hybrids for up to eleven generations
Author(s) -
TURNER SUSAN J.
Publication year - 1990
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.1744-7348.1990.tb04225.x
Subject(s) - biology , virulence , globodera pallida , hybrid , selection (genetic algorithm) , genotype , outbreeding depression , genetics , botany , solanaceae , population , gene , inbreeding , artificial intelligence , computer science , demography , sociology
SUMMARY Selection of Globodera pallida populations on resistant Solanum vernei ‐hybrids resulted in distinct virulent strains after eleven generations. Some of these virulent populations were assessed on their environmental fitness under field‐type conditions. All reproduced less well in unsterilised soil, but virulent populations were less affected by environmental variation than their avirulent counterparts. Evaluation of their reproductive ability could not equate virulence to overall enhanced or reduced genotypic fitness compared with their avirulent counterparts. These populations were shown to be genetically distinct from their unselected counterparts using isoelectric focusing and specific enzyme staining. The control and management of virulent G. pallida populations is discussed.