Analysis of genomic repetitive DNA sequences in closely related bird species

The genomic variation in six species of the genus Sylvia was studied by means of taxonomic typing, In contrast to other groups of vertebrates, this group displayed restriction-fragment spectra significantly differing from each other with each restriction enzyme. Restriction patterns differed even in geographically distant Phylloscopus collybita populations, The possible reasons for the difference in the distribution of highly repetitive sequences in birds are discussed.