The porcine stress gene was characterized from 59 animals (Landrace, Large White, Duroc and Pietran) through analysis of deoxyribonucleic acid (DNA) amplified by polymerase chain reaction (PCR) and digested with a restriction endonuclease. Blood, semen and plucked hair were used as source of DNA. The use of plucked hair is fast and non-invasive method that can be used for any animal within the production system. The genotype frequency was 0.73 to NN, 0.26 to Nn and 0.01 to nn.
stress gene; swine; DNA analysis
