Touma Shihei, Oyadomari Motoharu
Okinawa Prefectural Livestock and Grassland Research Center, Nakijin, Japan.
Okinawa Prefectural Livestock Division, Naha, Japan.
Anim Sci J. 2020 Jan-Dec;91(1):e13362. doi: 10.1111/asj.13362.
Indigenous Okinawa Agu pigs are crossed with Large White × Landrace (WL) pigs to improve their meat production, but there is little information regarding the crossbreeding effects. The study aims to compare growth, carcass characteristics, and meat qualities of Agu pigs with those of WL crossbreeds with Agu sires (WLA) or Duroc sires (WLD). WLA pigs showed better growth performance and carcass characteristics and less intramuscular fat (IMF) contents than Agu ones, but they had higher fat deposition, smaller longissimus dorsi muscle area, and higher IMF contents than WLD pigs. Agu pigs showed higher water holding capacity than the other two breeds. The inner layer of Agu backfat contains higher and lower proportions of monounsaturated fatty acids (MUFA) and polyunsaturated fatty acid (PUFA), respectively, than that in WLD animals. WLA animals had intermediate values for the fatty acid content in the inner backfat, although MUFA contents were equal to those of Agu pigs. Fatty acid profiles in IMF were similar to those in the backfat. These results indicate that crossbreeding of Agu with WL pigs improves growth performance and carcass quality. Particularly, WLA pigs have higher IMF contents and MUFA concentrations and lower PUFA concentrations than WLD pigs.
冲绳本地的阿古猪与大白猪×长白猪（WL）杂交，以提高其产肉性能，但关于杂交效果的信息较少。本研究旨在比较阿古猪与以阿古猪为父本的WL杂交猪（WLA）或杜洛克猪为父本的WL杂交猪（WLD）的生长性能、胴体特性和肉质。WLA猪比阿古猪表现出更好的生长性能和胴体特性，肌内脂肪（IMF）含量更低，但它们比WLD猪有更高的脂肪沉积、更小的背最长肌面积和更高的IMF含量。阿古猪比其他两个品种表现出更高的持水力。与WLD猪相比，阿古猪背膘内层的单不饱和脂肪酸（MUFA）比例更高，多不饱和脂肪酸（PUFA）比例更低。WLA猪背膘内层脂肪酸含量处于中间值，尽管MUFA含量与阿古猪相同。IMF中的脂肪酸谱与背膘中的相似。这些结果表明，阿古猪与WL猪杂交可提高生长性能和胴体品质。特别是，WLA猪比WLD猪有更高的IMF含量和MUFA浓度以及更低的PUFA浓度。
