genotype: example data of genotype for each marker (rownames)
and 60 strains such as recombinant inbred lines (RIL) (columnnames),
with numeric values 1 and 0 (or A and B).
In total there are 5 chromosomes with 20cM in length for each chromosome.
In each chromosome, 20 markers are evenly distributed on each chromosome.
As an example, 10 percent (=6) samples were added as mislabeled sample by swapping.