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.

中文翻译：

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冲绳本土阿古猪与阿古猪或杜洛克公猪杂交后代的生长性能、胴体特征和肉质比较。

本地冲绳 Agu 猪与大白×长白 (WL) 猪杂交以提高其肉产量，但关于杂交效果的信息很少。该研究旨在将 Agu 猪的生长、胴体特征和肉质与 WL 与 Agu 公牛 (WLA) 或杜洛克公牛 (WLD) 杂交的猪进行比较。与 Agu 猪相比，WLA 猪的生长性能和胴体特性更好，肌内脂肪 (IMF) 含量更低，但脂肪沉积更高，背最长肌更小肌肉面积和 IMF 含量高于 WLD 猪。阿古猪比其他两个品种表现出更高的持水能力。Agu 背膘的内层含有比 WLD 动物更高和更低比例的单不饱和脂肪酸 (MUFA) 和多不饱和脂肪酸 (PUFA)。尽管 MUFA 含量与 Agu 猪相同，但 WLA 动物的内背膘中脂肪酸含量处于中间值。IMF 中的脂肪酸谱与背膘中的相似。这些结果表明 Agu 与 WL 猪的杂交提高了生长性能和胴体品质。特别是，与 WLD 猪相比，WLA 猪具有更高的 IMF 含量和 MUFA 浓度以及更低的 PUFA 浓度。