Internationale de l'Éclairage (1978) . CIELABcolorspace is suitable for standardization of colorimetric practice in science, which is numerically coordinated to locate individual colors, where L* represents darkness and brightness, a* represents green and red
An inbred backcross (IBC) population derived from Lycopersicon hirsutum LA407 and L. esculentum was evaluated in replicated field trials to assess its potential for the improvement of red-fruited tomatoes. Significant phenotypic variation among genotypes was detected for the hue (tint), L (darkness), and chroma (saturation) of color. Significant effects due to environment and genotype × environment interactions also were observed. One superior inbred backcross line from this population, IBL 2349, was used to develop an F2 population and to explore the genetic basis of color. Two independent L. esculentum quantitative trait loci (QTL) associated with improved color were identified based on linkage to markers mapping to chromosome 4 and chromosome 11. Epistatic interactions were identified between the two L. esculentum loci. Unexpected epistatic interactions also were identified between L. esculentum loci and an LA407 introgression on chromosome 7 present within IBL 2349. The two L. esculentum QTL and the epistatic interactions were confirmed in replicated trials with F3 and F4 families. The loci identified in this study and their epistatic interactions may provide additional tools for the improvement of red-fruited tomatoes in breeding programs.
The color and chemical composition of three strawberry (Fragaria ×ananassa Duchesne) cultivars, `Arking', `Cardinal', and Earliglow' and one advanced selection, A-7383, were examined at four maturity stages in a 2-year study. Cultivar- and maturity-related differences were observed in CIELAB color space coordinates, L*, a*, b*, anthocyanin concentration, percent soluble solids; pH, titratable acidity, sugar/acid ratio, and total solids, insoluble solids, fructose, and sucrose content. No cultivar effect was detected for glucose concentration. `Arking' and `Cardinal' had the most intense red color and were similar in L*, a*, b* values, titratable acidity, and the concentration of anthocyanin, soluble solids, total solids, and fructose. They differed significantly in pH, sugar/acid ratio, and insoluble solids. A-7383 and `Earliglow' exhibited differences in all measured characteristics except total solids. A-7383 fruits contained the lowest anthocyanin concentration and were the darkest and least red of the genotypes.
method on seed maturity that can be completed in the field is of utmost importance. Previously, we demonstrated that CIELABcolorspace is a quantitative method for capsule color measurement, which could be used to imitate the seed development and predict
values of red, green, and blue. In contrast, color spaces such as CIELab were designed to approximate human perception of color [ Commission Internationale de l'Éclairage (CIE), 1978 ]. CIELabcolorspace is a reference standard and is most commonly used
option, based on ease of use. Although RHS values can be used as a standard to report the color of biological samples, variation in hues can be more easily described numerically by using the CIELABcolorspace ( International Commission on Illumination
). Lutescens mutant accessions had a wide array of values in CIELABcolorspace ( Table 2 ). The entire range of lutescens leaf colors plotted in the CIELABcolorspace encompassed that of ‘Jupiter’ bell pepper ( Table 2 ). As expected, CIELAB readings could
colors measured by colorimeter. The cluster analysis method using the furthest neighbor, coupled with CIElabcolorspace data ( Voss, 1992 ) was used to characterize spathe color. Extraction of anthocyanins and TF. Zantedeschia hybrida spathes were
, or saturation intensity, and h ab represents hue, or the angular component of the polar representation of CIELABcolorspace ( CIE, 1978 ). The reference illuminant was D65 and the observer angle was set to 2°. Spectral analysis was performed with
completely senesced tendrils were recorded. Ground spot color was measured in International Commission on Illumination L* a* b* (CIELAB) colorspace coordinates using a Minolta CM-2002 Spectrophotometer with a CIE A standard illuminant (Minolta, Tokyo, Japan