Testing of the Hungarian Common Carp Hybrid (P-31) for Producing the Second Generation of Parental Lines

Abstract

A breeding experiment was set to produce the pure lines of scaled and mirror carp from the Hungarian hybrid (P-31) introduced from Fisheries Research Institute of Hungary. The two lines will be used to produce a second generation of the Hungarian hybrid to be used for aquaculture production. The experiment was carried out during 1989 to 1996 at the National Aquaculture Genetics Research Institute's Strain Testing Unit in Phitsanulok and Khonkaen provinces. The procedures included the breeding of P-31 and a test cross of its phenotypically scaled F1 offspring with a scattered mirror carp, which was also its F1 offspring. Although the test cross procedure is strait- forward, it is time consuming, laborious and facility demanding. The result from this experiment indicated a noticeable shape differences among the scaled phenotype offspring of P-31. The shape differences were confirmed and linked, to some degree, with their genotypes controlling scale appearances using a truss network method and principal components analysis. The finding suggested that by selecting a certain shape of fish before subjecting to a test cross procedure would improve the probability of obtaining the pure line scaled carp from the scaled phenotype offspring of the P-31.