13Mating or crossing 2 different strains or varieties of the samespeciesAlso known as Intraspesific HybridizationA breeding program that increases the breeding value - resulted in production of new strain X Same species (goldfish) but different strain
14Application of Crossbreeding : Increase performance of the entire stocks Producing progeny that has intermediate performance obtained from the broodstocks Produce and increase the quality or performance of a new pure stock (pure breed). To exploit heterosis Heterosis : increase in performance of progeny that exceed the performance of the broodstock.
36Manipulation of the whole genome of an organismat the chromosomal level to obtain desiredcharacteristics. Manipulation is done to the whole chromosome set and not at the DNA strands Main Purpose : production of sterile fish Production of monosex population Attain higher growth rate Applied to eggs or spermatozoa or fertilized eggs
38 3 Main TecniquesPolyploidy Androgenesis Addition in the Limiting inheritance to thechromosome number paternal parent Limiting inheritance to the Gynogenesis maternal parent