Premium
The genetic relationship between races of Bremiae lactucae and cultivars of Lactuca sativa
Author(s) -
CRUTE I. R.,
JOHNSON A. G.
Publication year - 1976
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.1744-7348.1976.tb01701.x
Subject(s) - biology , cultivar , race (biology) , lactuca , resistance (ecology) , virulence , host (biology) , gene , botany , genetics , agronomy
SUMMARY The reactions of lettuce cultivars to physiologic races of Bremia lactucae are interpreted in terms of a gene‐for‐gene relationship between pathogen and host. The hypothesis takes into account the parentage of cultivars and the origins of their resistance, the characteristics of the resistance reactions and data available from detailed genetical analysis of various race/cultivar combinations. Cultivars are classified with respect to ten postulated resistance genes and B. lactucae races are defined by the virulence genes present. The practical significance of these studies is discussed in relation to both future lettuce breeding programmes and to the choice of cultivars available to counteract any given local race situation.