From linkage group to chromosome

Note that identifying a linkage group does not tell you which chromosome you are looking at. And, unless there are at least a few common markers, two maps cannot be directly compared with each other - even when they have been produced from the same cross.

Usually the scientific community comes to some agreement about which linkage group will be called “1” etc., and some morphological or cytological characteristic may be used to help identify particular chromosomes. Conventionally chromosome 1 is the largest in the karyotype, as in tomato.