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how to calculate genetic position for each marker from the genetic map file?

Hello,

I want to calculate genetic position for my SNPs (~ 1million) to make a map file. I have a genetic map file.

head genetic_map
chr pos LG  cM
Chr01   1   0.01
Chr01   1000001 0.48
Chr01   2000001 2.83
Chr01   3000001 5.26

How can I use the genetic map file to calculate genetic position for each marker? I mean which formula can I use to estimate genetic positions? Thanks

genetic-position map

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