Genetic parameters for preweaning and early growth traits in Berkshire pigs when creep feeding is used

被引：15

作者：

Tomiyama, M. ^{[3
]}

Kanetani, T. ^{[1
]}

Tatsukawa, Y. ^{[1
]}

Mori, H. ^{[1
]}

Oikawa, T. ^{[2
]}

机构：

[1] Okayama Prefectural Ctr Anim Husb & Res, Misaki, Okayama 7093494, Japan

[2] Okayama Univ, Grad Sch Nat Sci & Technol, Okayama 7008530, Japan

[3] Tohoku Univ, Dept Anim Breeding & Genet, Grad Sch Agr Sci, Aoba Ku, Sendai, Miyagi 9818555, Japan

来源：

JOURNAL OF ANIMAL SCIENCE | 2010年 / 88卷 / 03期

关键词：

Berkshire pig; creep feeding; genetic parameter; preweaning trait; RESTRICTED MAXIMUM-LIKELIHOOD; BIRTH-WEIGHT; POSTWEANING GROWTH; INDIVIDUAL BIRTH; MILK REPLACER; PERFORMANCE; PRODUCTIVITY; ASSOCIATION; COVARIANCES; COMPONENTS;

D O I：

10.2527/jas.2009-2072

中图分类号：

S8 [畜牧、动物医学、狩猎、蚕、蜂];

学科分类号：

0905 ;

摘要：

The objective of this study was to find optimal traits for inclusion in selection criteria by estimating genetic parameters for direct genetic, maternal genetic, and common environmental effects for growth traits before 60 d of age and for the number of teats under an open breeding population, and to evaluate genetic relationships for traits at 60 d of age. Records of 2,344 male and 2,204 female purebred Berkshire pigs were analyzed. For BW at 14 d of age and for weaning weight, the heritabilities of a direct genetic effect were greater than those of a maternal genetic effect. This result is contrary to previous results showing a gradual decrease in the maternal genetic effect and an increase in the direct genetic effect up to weaning. The positive genetic correlations between direct and maternal genetic effects for BW at 14 d of age and weaning weight are clearly contrary to other reports. This phenomenon seems to be caused by creep feeding begun just after the birth of the piglets and maintained throughout the preweaning period in this Berkshire population.

引用

页码：879 / 884

页数：6

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