期刊
LIVESTOCK PRODUCTION SCIENCE
卷 97, 期 2-3, 页码 193-202出版社
ELSEVIER
DOI: 10.1016/j.livprodsci.2005.04.007
关键词
selection; desired gains; genetic parameters; intramuscular fat; pigs
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 r(G): 0.23, phenotypic correlation r(P): 0.07) and BF (r(G): 0.24, r(P): 0.21); it was correlated negatively with EM (r(G): -0.24, r(P): -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. (c) 2005 Elsevier B.V All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据