Chromosome manipulation in fish - A review

Chromosome manipulations can be carried out easily in fishes due to their e xternal fertilization and embryogenesis. In recent years a great deal of re search has been conducted on chromosome set manipulation (polyploidy, gynog enesis and androgenesis) in a number of species. The rationale for this wor k has been to produce sterile progeny for culture; for sex manipulation; an d to produce highly inbred or cloned lines for crossbreeding for research p urpose. Haploid, gynogenetic diploid, triploid and tetraploid genotypes hav e been produced in a number of species and yet this research has been of li ttle or no discernible benefit to the world-wide culture industry. Techniqu es for induction and verification of chromosome set manipulation are review ed and the potential applications of these are discussed.