An object of class cross. See
read.cross for details.
chr
Vector of chromosomes to plot. If missing, plot all
chromosomes.
reorder
Specify whether to reorder individuals according to
their phenotypes.
ll{
FALSE Don't reorder
TRUE Reorder according to the sum of the phenotypes
n Reorder according to phenotype n}
main
Title to place on plot.
...
Ignored at this point.
Value
None.
Details
Uses image to plot a grid with black pixels where the
genotypes are missing. For intercross and 4way cross data, gray
pixels are plotted for the partially missing genotypes (for example,
``not A'').