For this example, a doubled haploid population of 200 individuals was developed by crossing a short line (parent A), with a tall line (parent B). The 200 doubled haploid lines were evaluated in a field trial and the plant height measured in cm (the data is in the file DHpop_pheno.txt). The population was also genotyped by SNPs, and the data is presented in the file DHpop_geno.txt. The map location of each of the markers is in the file DHpop_map.txt.
A data frame 130 row (markers) and 3 column.Column 1 gives the marker names, column 2 the chromosome on which the marker has been mapped, and column 3 indicates the position of the marker within the chromosome.