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Relative ability of two strains of Pucccinia graminis tritici to survive when mixed
Author(s) -
OGLE HELEN J.,
BROWN J. F.
Publication year - 1970
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.1744-7348.1970.tb06434.x
Subject(s) - biology , strain (injury) , relative survival , inoculation , host (biology) , virulence , gene , horticulture , genetics , cancer registry , anatomy , cancer
SUMMARY The relationship between relative survival ability and the number of genes for virulence in two strains of Puccinia graminis tritici was investigated using a differential variety to determine the proportion of each race in the mixture. The strain with the widest host range (21 Anz‐2,3,7) became predominant after a number of uredial generations, regardless of its proportion in the original inoculum mixture. However, despite the higher relative survival ability of strain 21 Anz‐2,3,7, strain 21 Anz‐2,7 persisted at c . 1% frequency after four successive uredial generations. The longer the period between successive inoculations, the more rapidly strain 21 Anz‐2,3,7 became predominant in the mixture. The variety on which the mixture was cultured did not influence the relative survival ability of the two strains.