Effect of swine stress gene on quality and quantity of carcass

Revista Brasileira de Zootecnia

Dellagostin, Odir Antonio²  Federizzi, Joreci¹  Deschamps, João Carlos²  Bastos, Reginaldo Gaspar²  Cardellino, Ricardo Alberto² 

[1] UFPel

关键词: swine carcass;    halothane gene;    PCR;    PSE;    PSS   IntroduçãoO gene do estresse suíno;    também chamado de gene halotano (gene hal);    codifica para canais liberadores de cálcio (CRC) do retículo sarcoplasmático do músculo esquelético (FUJII et al;   

DOI  :  10.1590/S1516-35982001000100007

学科分类：兽医学

来源: Universidade Federal de Vicosa

【 摘 要 】

- The swine stress gene (hal gene) in recessive homozygosis (nn) is associated with the occurrence of the Porcine Stress Syndrome (PSS) and with the occurrence of pale, soft and exudative pork (PSE). In heterozygosis (Nn) it is related to low quality of carcass, but higher carcass weight. This study has characterized the genotype of hal gene by DNA-testing, obtained by alkaline extraction from a single hair root, in a sample of 160 swines. These animals were slaughtered and carcass traits for each animal were measured. Among the 160 animals, 82 (52.58%) were identified as NN, 67 (41.80%) as Nn, and 9 (5.62%) as nn. Variation in carcass traits across genotypes was evaluated by analysis of variance, using SAS. The NN, Nn and nn animals did not differ for: hot carcass weight, backfat thickness, muscle depth, lean meat percentage, and longissimus dorsi muscle color. However, variation in carcass color was lower for NN (40.82%) than for Nn (49.77%) and nn (53.83%) animals. These results indicate that the presence of hal gene in heterozygosis or recessive homozigosis was not associated with better carcass weight and the utilization of these animals may lead to lower carcass quality. Therefore, the intentional use of heterozygous and recessive homozygous animals should not be encouraged.

【 授权许可】

CC BY-NC