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JoinMap outputting numbers too big to represent cM

Hi!

I have SNP microarray data from Illumina and I'm trying to make a linkage map with the markers.

Comparing our groupings with previous articles the regions found make sense, but the position itself for the markers (in cM) doesn't. It's my first time dealing with this kind of data and analysis.

I have no idea what might be causing this situation

An example of what's being shown in  the map itself

Subset of the Fit&Stress table

joinmap genomic mapping linkage map

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