The study aimed to investigate the genetic parameters of the production and reproduction traits of Korean Duroc, Landrace, and Yorkshire pigs. Three production traits, namely average daily gain (ADG), age at 105 kg body weight (DAYS105) and backfat thickness (BFT), and three reproduction traits, namely age at first farrowing (AFF), total number of piglets born (TNB) and number of piglets born alive (NBA), were analyzed. The reproduction dataset was based on first-parity gilts only. However, the production dataset comprised pigs of both sexes. Genetic parameters were estimated from individual datasets using a multiple-trait animal model in AIREMLF90 software. The heritability values of ADG, DAYS105 and BFT were 0.34–0.36, 0.41–0.44 and 0.38–0.48, respectively, across breeds. Heritability values for AFF, TNB and NBA were 0.07–0.14, 0.09–0.11 and 0.09–0.10, respectively. Strong genetic correlations existed between ADG and DAYS105 (−0.97) and between TNB and NBA (0.90 to 0.96). In line with breeding goals, all productive traits in Duroc pigs, and all reproduction traits except AFF in Landrace and Yorkshire pigs, also showed noticeable improvements in recent years. In conclusion, we believe that our findings on economic traits would greatly assist future pig breeding decisions in Korea.

中文翻译：

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韩国杜洛克、长白猪和约克夏猪主要生产和繁殖性状的遗传分析


该研究旨在调查韩国杜洛克猪、长白猪和约克夏猪的生产和繁殖性状的遗传参数。三个生产性状，即平均日增重（ADG）、105公斤体重（DAYS105）和背膘厚度（BFT），以及三个繁殖性状，即初产仔数（AFF）、仔猪出生总数（TNB）和活产仔猪数量 (NBA) 进行了分析。繁殖数据集仅基于第一胎后备母猪。然而，生产数据集包含两种性别的猪。使用 AIREMLF90 软件中的多性状动物模型根据单个数据集估计遗传参数。各个品种的 ADG、DAYS105 和 BFT 的遗传力值分别为 0.34-0.36、0.41-0.44 和 0.38-0.48。 AFF、TNB 和 NBA 的遗传力值分别为 0.07–0.14、0.09–0.11 和 0.09–0.10。 ADG 和 DAYS105 之间（−0.97）以及 TNB 和 NBA 之间（0.90 至 0.96）之间存在很强的遗传相关性。与育种目标一致，杜洛克猪的所有生产性状，以及长白猪和约克夏猪除 AFF 之外的所有繁殖性状，近年来也显示出显着的改善。总之，我们相信我们对经济性状的研究结果将极大地帮助韩国未来的生猪育种决策。