Selection for daily gain, loin-eye area, backfat thickness and intramuscular fat based on desired gains over seven generations of Duroc pigs

K. Suzuki, H. Kadowaki, T. Shibata, H. Uchida, A. Nishida

研究成果: Article査読

68 被引用数 (Scopus)

抄録

To develop an excellent line of Duroc breed in performance traits and meat quality traits, selection of that breed was conducted over seven generations for growth rate (DG), real-time ultrasound loin eye muscle area (EM), backfat thickness (BF), and intramuscular fat content (IMF) based on desired gains. Those performance traits were measured in 1646 pigs. Meat quality traits were measured in 547 pigs. Meat quality traits were IMF and tenderness (TEND) in M. longissimus that was taken two sections above the last rib and measured 24 h after slaughter. Selection was based on a selection index method that included four traits at the first and second generations of selection: DG, EM, BF, and IMF. After the third generation, EBVs for four traits were obtained from analyses of performance and meat quality data. Respective heritability estimates for DG, EM, BF, IMF, and TEND were 0.48, 0.45, 0.72, 0.46, and 0.45. The IMF was correlated positively with DG (genetic correlation rG: 0.23, phenotypic correlation rP: 0.07) and BF (rG: 0.24, r P: 0.21); it was correlated negatively with EM (rG: - 0.24, rP: - 0.24). Selection and correlated responses were estimated from predicted breeding values using genetic parameters derived from multivariate REML analysis. Those responses corresponded well with DG and IMF.

本文言語English
ページ(範囲)193-202
ページ数10
ジャーナルLivestock Production Science
97
2-3
DOI
出版ステータスPublished - 2005 11月
外部発表はい

ASJC Scopus subject areas

  • 動物科学および動物学
  • 獣医学(全般)

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