File:Fisher's Polygenic Model.png

English: Graphical Representation of Fisher's Polygenic Model in Quantitative Genetics. The figure presents a depiction of the allelic effects of individual loci on a quantitative trait, as conceptualized in Fisher's polygenic model. Each bar represents the effect of an individual locus, derived from a synthetically generated dataset under the assumption of a Gaussian distribution of allelic effects. The x-axis enumerates the discrete genetic loci, while the y-axis measures the magnitude of the allelic substitution effect. A color gradient, from red to blue, is employed to signify the magnitude and direction of the effect: blue corresponds to loci with a positive additive effect, and red indicates a negative contribution. A cumulative allelic effect is annotated at the bottom, showcasing the combined genetic influence on the quantitative trait. Adjacent to the plot, a colorimetric scale provides a reference for effect magnitude, with more saturated hues representing larger effects. The displayed data is in silico. Comprehensive studies using real genomic datasets on complex traits typically are substantially polygenic, moreso than depicted here.