Optimum Measure of Cap Color in Agaricus bisporus Wild and Cultivated Strains

Abstract

Cap color was characterized on a wide range of Agaricus bisporus strains. L, a and b tristimulus coordinates were tested by linear model analysis to determine color information related to each parameter. One model was retained: log(L/(100-L)) ϭ ␣ * H ϩ ␤. Visual cap color variation was continuous and well described by log(L/(100-L)) or H parameters. In the wild, the range of color varied from white to dark brown which would enable mushroom breeding for cap color adapted to the market.

Quantitative Trait Locus Mapping of Yield-Related Components and Oligogenic Control of the Cap Color of the Button Mushroom, Agaricus bisporus

“…While the PPC1 locus was found to be recessive for the white color (3), our data did not allow us to establish the dominance status of the two new loci, since only additive effects could be estimated. Such oligogenic control of cap color has already been suggested (24,27), and this assumption is coherent with the variability observed for this trait in genetic resources (2,24).…”

Verticillium disease of Agaricus bisporus: variations in host contribution to total fungal DNA in relation to symptom heterogeneity

“…The colour was measured on fresh tissues of each class (W, LBr and Br) using the parameter L (0 for black to 100 for white) given by a Minolta chromameter Ò CR221 (Minolta Camera Co., Japan) (Sapers et al 1994;Moquet et al 1997;Soler-Rivas et al 2000). Data were reported as means of three measurements per sample.…”

Evidence forPPC1,a Determinant of the Pilei-Pellis Color ofAgaricus bisporusFruitbodies

“…Therefore, the second generation hybrids previously used for BSN were also useful for studying the segregation of the cap color among the homokaryotic progeny of the intervarietal hybrid. The trait was assessed with the CIELAB system and, more specifically, with the parameter log(L/(100 Ϫ L)) previously proposed by Moquet et al (1997). We show that the white color of the cap was determined by a recessive allele at a single locus (pileipellis color 1 or PPC1) linked to the alcohol dehydrogenase (ADH) locus.…”

“…Nevertheless, if we compare the two flushes, strains were in the same class: white or brown. The darkest mushroom in the white class can be characterized in the color NCS Index by S1005-Y20R, and the lightest mushroom in the brown class by S2020-Y10R (Moquet et al, 1997).…”