|Liu, Q - UNIV OF MEMPHIS|
|Simco, Bill - UNIV OF MEMPHIS|
Submitted to: Journal of Heredity
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: May 10, 2004
Publication Date: N/A
Interpretive Summary: Gene linkages can be inferred from recombination rates by the distribution of the gene products in the progeny produced by experimental matings. By using experimental matings between channel catfish females and hybrid male catfish (channel catfish female X blue catfish male) we demonstrate that isocitrate dehydrogenase (IDH-m) is located on the same chromosome as the testis determining gene. Further, mannose phosphate isomerase and glucosephosphate isomerase-A are located are linked to each other and are not located on the sex determining chromosome. Evolutionary relationships of these gene arrangements are compared among teleost species.
Technical Abstract: We observed sex-linkage of isocitrate dehydrogenase (IDH-m), and genetic linkage of mannose phosphate isomerase (MPI) and glucosephosphate isomerase-A (GPI-A), in two experimental matings between channel catfish Ictalurus punctatus females and hybrid males (channel catfish female ? blue catfish I. furcatus male) with recombination rates of 12.7% and 5.5%, respectively. Evolutionary relationships of these gene arrangements were compared among teleost species.