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A total of 314 pigs were used of genetic group and gender interaction on quality parameters of pigs in an arid climate zone. Variables in the study were analyzed using a linear model with the effects of genetic group, gender month of slaughter, genetic by gender interaction, animal age and hot carcass weight as co-variables and error as a random component. Differences (p > 0.05) by genetic group and gender interaction were not observed but significant differences (p < 0.05) by gender on Carcass Length (CL), Loin Eye Area (LEA) and Back Fat (BF1-BF3) were noted. Gilts showed higher CL and LEA than barrows with values of 73.62 +/- 0.44 cm and 33.67 +/- 0.70 cm(2) by trait, respectively. Barrows showed greater BF values than in gilts. Differences (p < 0.05) by gender for a*values were monitored being higher in gilts. (4.53 +/- 0.17) than in barrows (4.12 +/- 0.14). The mean value of pH was 5.72 +/- 0.01 with the lowest values seen in the hottest months. During the months with the highest temperatures. L*value tended to increase due to the highest amount of free surface water with a maximum value of 60.27. The mean value of SF was 3.03 +/- 0.04 kgf indicating tender meat. The meat from gilts showed a more intense red color whereas the barrows carcasses had more fat. Height temperatured favored occurrence of PSE meat. A better control in the production system as well as in ante-mortem management is recommended so that differences among genetic groups may be detected.