SIRE BREED AND BREED GENOTYPE OF DAM EFFECTS IN CROSSBREEDING BEEF-CATTLE IN THE SUBTROPICS .1. BIRTH AND WEANING MASS OF CALVES

被引：0

作者：

VANZYL, JGE ^{[1
]}

SCHOEMAN, SJ ^{[1
]}

COERTZE, RJ ^{[1
]}

机构：

[1] UNIV PRETORIA,DEPT LIVESTOCK SCI,PRETORIA 0001,SOUTH AFRICA

来源：

SOUTH AFRICAN JOURNAL OF ANIMAL SCIENCE-SUID-AFRIKAANSE TYDSKRIF VIR VEEKUNDE | 1992年 / 22卷 / 05期

关键词：

BIRTH MASS; CROSSBREEDING; DAM BREED GENOTYPE; SIRE BREED; WEANING MASS;

D O I：

暂无

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 influence of sire breed and breed genotype of dam on birth and weaning mass in calves of Afrikaner, Hereford, Simmentaler and Bonsmara cattle, as well as F1, and two- and three-breed rotational crosses between Afrikaner, Hereford and Simmentaler were investigated. Afrikaner bulls sired calves with lower birth and weaning mass (P less-than-or-equal-to 0.05) than other breeds of sire. In terms of weaning mass, all the crossbreeding systems proved superior to purebred Afrikaner and Hereford breeding, but not to purebred Simmentaler and Bonsmara breeding. Simmentaler dams produced calves of heavier (P < 0.05) birth mass than other purebreds. An increase in percentage Afrikaner breeding in the dam led to a reduction in birth mass, while the reverse applied to an increase in Simmentaler breeding. Cows of predominant Simmentaler breeding tended to wean heavier calves than cows of predominant Afrikaner breeding.

引用

页码：161 / 165

页数：5