Comparison of two models to estimate genetic parameters for number of born alive in pigs

Ayane Konta, Shinichiro Ogawa, Makoto Kimata, Kazuo Ishii, Yoshinobu Uemoto, Masahiro Satoh

研究成果: Article査読

2 被引用数 (Scopus)


The performance of the two-trait animal model that regards the first parity and later parities as two different traits in estimating genetic parameters for number of born alive (NBA) was examined using real and simulated data. Genetic parameters for NBA were estimated in purebred Landrace and Large White pigs using a single-trait repeatability model (Model 1) that regards all parities as the same trait and a two-trait animal model (Model 2) that regards the first and the later parities as different traits. For Model 2, the permanent environmental effect was fitted to only the records of the later parities. Heritability for NBA estimated using Model 1 was 0.12 for Landrace and 0.11 for Large White. Estimated heritability for NBA of the first parity and the later parities was 0.21 and 0.16, respectively, for Landrace; 0.18 and 0.16, respectively, for Large White obtained using Model 2, and higher than those in both breeds obtained using Model 1. Further results based on data simulated using the Monte Carlo method suggest that estimated additive genetic variance could be more biased using Model 2 than Model 1.

ジャーナルAnimal Science Journal
出版ステータスPublished - 2020 1 1

ASJC Scopus subject areas

  • 農業および生物科学(全般)


「Comparison of two models to estimate genetic parameters for number of born alive in pigs」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。