INADVERTENT HYBRIDIZATION IN A CARP HATCHERY AS DETECTED BY NUCLEAR-DNA RFLP

The Indian Major Carps Catla catla, Labeo rohita and Cirrhina mrigala, when spawned together in a 'spawning pool', hybridized at an estimate d frequency of about 10%. The F-1 hybrids of these species lack any im proved economic traits hut are fertile and can backcross with the pare ntal species causing genetic introgression. (C) 1997 The Fisheries Soc iety of the British Isles.