The objective of this work was to determine the frequency of the porcine stress sindrome (PSS) gene mutation and its association with reproductive traits in crossbred gilts. Seventy two crossbred Landrace x Large White females from commercial farms of Ponte Nova region location - Minas Gerais State, were analyzed for the PSS mutation. The mutation diagnose was made by polimerase chain reaction - restriction fragment length polimorphism, where the 659pb fragment from the ryr-1 gene was amplifyied, and in the mutants the substitution of cytosine by thimine, that leads to the change in the mature protein amino acids from arginine to cysteine in the affected animals, was identified. Data relative to the number of piglets born alive, born alive with low viability and dead piglets per litter, average piglets born weight and estrus return were analyzed. From the total gilts, 13,88% of heterozygous gilts and none recessive homozygous were found. There was no effect of the genotypes on the analyzed traits.
PCR-RFLP; crossbred gilts; PSS
