Recently a number of new, improved groups of Nile tilapia have been introduced in the tilapia industry. The GIFT (genetically improved farmed tilapia) (BENTSEN et al., 1998) is the most popular, arrived in Brazil in 2005 from World Fish Center, Malaysia. The Supreme strain in Brazil, from Genomar Supreme TilapiaTM strain, is the continuation of the GIFT breeding program run over a 10-year period, ending in 1998. The two major changes made for Genomar were to apply DNA-fingerprinting as an identification tool and to change to a revolving mating scheme, in order to complete the generation after nine monthly batches. DNA-typing gave several advantages in form of increased selection intensity, shorter generation interval and operational benefits (EL-SAYED, 2006).