Returns the numerical Id of the last marker known.
The mrklast command is invoked either as:
CarthaGene version 1.2-LKH, Copyright (c) 1997-2010 (INRA). CarthaGene comes with ABSOLUTELY NO WARRANTY. CarthaGene is free software. You are welcome to redistribute it, under certain conditions. See the License file for information. Type 'help' for help. CG> dsload Data/bc.cg {1 f2 backcross 20 208 /home/tschiex/Dev/carthagene/doc/user/exemple/Data/b... CG> dsload Data/rh.cg {2 haploid RH 53 118 /home/tschiex/Dev/carthagene/doc/user/exemple/Data/rh.cg} CG> mrklast 59