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

Research output: Contribution to journalArticlepeer-review

Abstract

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.

Original languageEnglish
Pages (from-to)e13417
JournalAnimal science journal = Nihon chikusan Gakkaiho
Volume91
Issue number1
DOIs
Publication statusPublished - 2020 Jan 1

Keywords

  • Landrace
  • Large White
  • genetic parameter estimation
  • number of born alive
  • permanent environmental effect

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)

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