Zheng Yangxun, Ma Fuping, Zhao Xitong, Liu Yanling, Zou Quan, Liu Huatao, Li Shujuan, Zhang Zipeng, Yang Sen, Xing Kai, Wang Chuduan, Ding Xiangdong
State Key Laboratory of Animal Biotech Breeding, National Engineering Laboratory for Animal Breeding, Key Laboratory of Animal Genetics, Breeding and Reproduction of Ministry of Agriculture and Rural Affairs, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China.
Beijing Shunxin Agriculture Co., Ltd., Beijing 101300, China.
Animals (Basel). 2025 Jul 14;15(14):2075. doi: 10.3390/ani15142075.
Carcass and meat quality traits are critical in pig breeding and production. Estimating genetic parameters for these traits is a vital aspect of breeding engineering, as accurate genetic parameters are essential for estimating breeding values, predicting genetic progress, and optimizing breeding programs. This study was conducted on a population of 461 Yorkshire pigs from the same breeding farm, which were slaughtered to assess nine carcass traits and seven meat quality traits, followed by descriptive statistical analysis. Additionally, we estimated the genetic parameters of these traits using genomic information based on 50K chip data. The results indicated that sex significantly affected most carcass and meat quality traits. Carcass traits including carcass length indicators (h = mean 0.35), backfat thickness indicators (h = mean 0.36), eye muscle area (h = 0.28), and the number of rib pairs (h = 0.28) exhibited medium to high heritability. Carcass length indicators showed high genetic correlations with backfat thickness indicators (r = mean -0.49) and the number of rib pairs (r = mean 0.63), while high negative genetic correlation (r = -0.72) was noted between eye muscle area and the number of rib pairs. Meat quality traits also displayed medium to high heritability, expect for pH value measured within one hour post-slaughter (h = 0.12). Drip loss indicators had higher genetic correlations with pH (r = mean -0.73) than with meat color indicators (r = mean 0.22). These findings may provide a theoretical reference for genetic evaluation and breeding in the Yorkshire pig population.
胴体和肉质性状在猪的育种和生产中至关重要。估计这些性状的遗传参数是育种工程的一个重要方面，因为准确的遗传参数对于估计育种值、预测遗传进展和优化育种计划至关重要。本研究对来自同一育种场的461头约克夏猪群体进行，将其屠宰以评估9个胴体性状和7个肉质性状，随后进行描述性统计分析。此外，我们基于50K芯片数据利用基因组信息估计了这些性状的遗传参数。结果表明，性别对大多数胴体和肉质性状有显著影响。胴体性状包括胴体长度指标（h = 平均0.35）、背膘厚度指标（h = 平均0.36）、眼肌面积（h = 0.28）和肋骨对数（h = 0.28）表现出中等到高的遗传力。胴体长度指标与背膘厚度指标（r = 平均 -0.49）和肋骨对数（r = 平均0.63）呈现出高遗传相关性，而眼肌面积与肋骨对数之间存在高负遗传相关性（r = -0.72）。肉质性状除屠宰后一小时内测得的pH值（h = 0.12）外也表现出中等到高的遗传力。滴水损失指标与pH的遗传相关性（r = 平均 -0.73）高于与肉色指标的遗传相关性（r = 平均0.22）。这些发现可为约克夏猪群体的遗传评估和育种提供理论参考。
