Order loci on genetic linkage maps with this tool. The program RECORD (REcombination Counting and ORDering) can be used for the ordering of loci on genetic linkage maps. The method minimises the total number of recombination events. The search algorithm is a heuristic procedure, combining elements of branch-and-bound with local reshuffling.

Since the criterion does not require intensive calculations, the algorithm rapidly produces an optimal ordering as well as a series of near-optimal ones. The latter provides insight into the local certainty of ordering along the map.

RECORD can deal with the following types of mapping populations: BC1, F2, F3, RILs (in fact any generation obtained by repeated selfing of a hybrid between homozygous parents). Mapping populations from non-inbreds should be split into BC1 or HAP data that represent the maternal and paternal gametes, according to the two-way pseudo-testcross method. Please provide the data in a .LOC file in JoinMap format.

The license of this software is Freeware, you can free download and free use this calculator software.