Zmapqtl is part of the QTL Cartographer suite of programs.

Zmapqtl uses composite interval mapping to map quantitative trait loci to a map of molecular markers. It requires a molecular map that could be a random one produced by Rmap, or a real one in the same format as the output of Rmap. In addition, the program requires the results of the stepwise linear regression analysis of SRmapqtl for composite interval mapping.