As of 1 April 2026, the PSJD database will become an archive and will no longer accept new data. Current publications from Polish scientific journals are available through the Library of Science: https://bibliotekanauki.pl
Wide genome physical mapping is becoming a main goal of current genomic research on many plant and animal species. It provides essential basis for large-scale genome sequencing, but requires well-saturated large-insert DNA genomic libraries. This review presents a progress in the construction and application of genomic libraries. New trends towards the improvement of cloning vectors and adjustment to new tasks of molecular genetics are also presented.