Quantitative trait loci


•The file “Homework Data.xlsx” contains the results of a QTL analysis of stem rust severity (%) for wheat chromosome 3B. The analysis used homozygous inbred

lines from a resistant parent × susceptible parent cross, and a SNP-based chip for wheat. The mean disease severities for both parental genotypes at each of

200 marker locations, as well as the significance(-log10p-value) of the marker-phenotype associations, are provided.

•How many quantitative loci can be identified? What is their estimated location and effect size?

Sample Solution