A quantitative trait locus of Agaricus bisporus resistance to Pseudomonas tolaasii is closely linked to natural cap color.
A quantitative trait locus (QTL) of resistance to Pseudomonas tolaasii was detected in Agaricus bisporus using a cross between a wild strain from the Sonoran desert and a cultivated strain. The resistance QTL was strongly linked with the brown color allele of PPC1. This QTL explained about 30% of the variation observed for living bacteria-induced symptoms. The use of bacterial toxin did not reproduce living bacteria symptoms but revealed the same QTL. The latter QTL was not affected by environmental variation. No relation was found between the resistance QTL and the tyrosinase gene, which is involved in the browning process.
Moquet
F
F
Station de Recherches sur les Champignons, Institut National de la Recherche Agronomique, Centre de Bordeaux, Villenave d'Ornon Cedex, F-33883, France.
Desmerger
C
C
Mamoun
M
M
Ramos-Guedes-Lafargue
M
M
Olivier
J M
JM
D000364:Agaricus / Q000235:genetics*; D000483:Alleles; D002874:Chromosome Mapping; D005800:Genes, Fungal / Q000235:genetics*; D008040:Genetic Linkage; D020022:Genetic Predisposition to Disease; D010858:Pigmentation / Q000235:genetics*; D016133:Polymerase Chain Reaction; D011549:Pseudomonas; D018709:Statistics, Nonparametric