Linkage of markers can help identify particular polymorphisms within the genome. These polymorphisms indicate slight changes within the genome that may present nucleotide substitutions or rearrangement of sequence. When developing a map it is beneficial to identify several polymorphic distinctions between two species as well as identify similar sequences between two species.
Identifying markers that are linked to specific genetic variations within a genome can help pinpoint these variations, which may involve changes in nucleotides or rearrangements of the sequence. When creating a map, it is advantageous to identify multiple differences in the DNA between two species and also find similar sequences between them.