돼지의 등지방두께와 도체중이 육질등급에 미치는 영향추정

This study was carried out to investigate the effect of environmental fators on backfat thickness and carcass weight and to investigate the carcass grade frequencies by sex, backfat thickness and carcass weight in commercial pigs. Total 20,450,773 of commercial pigs was used in this study, which were obtained from Korea institute for Animal Product Evaluation (KAPE) from July 1, 2007 to April 30, 2009. The averages of carcass weight and backfat thickness were 20.76±0.001 ㎜ and 85.97±0.002 kg, respectively. Carcass weight and backfat thickness of barrow were 22.55±0.002 ㎜ and 86.25±0.003 kg, respectively, which were significantly higher than those of males and females. The carcass weight and backfat thickness were increased with the slaughter years. In the effects of the season of slaughter, carcass weight was significantly higher in winter (87.00±0.007 kg), and the backfat thickness was significantly higher in fall (19.32±0.004 ㎜). In grade frequencies of carcass quality grade in sex, grade frequencies of high grade in barrow was higher than those of female in hot carcass and cold carcass. In grade frequencies of carcass quality grade in carcass weight, grade frequencies of high grade in 84∼88kg was higher than the other groups in hot carcass and cold carcass. In grade frequencies of carcass quality grade in backfat thickness, grade frequencies of high grade in 22∼24 ㎜ was higher than other groups in hot carcass and cold carcass.