Genetic analysis of milk producing efficiency traits in crossbred cattle

被引：0

作者：

Singh, VK ^{[1
]}

Singh, CV ^{[1
]}

Kumar, D ^{[1
]}

机构：

[1] Govind Ballabh Pant Univ Agr & Technol, Dept Anim Breeding & Genet, Coll Vet & Anim Sci, Pantnagar 263145, Uttar Pradesh, India

来源：

INDIAN JOURNAL OF ANIMAL SCIENCES | 2005年 / 75卷 / 01期

关键词：

cattle; crossbred; genotype; heritability; milk production efficiency; phenotype;

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：

Data on first lactation milk yield/day of first lactation period, first lactation milk yield/day of age at first calving, life time milk yield/day of life time lactation period and life time milk yield/day of total age at calving of 393 animals of 6 genetic groups (Sahiwal, Rathi x Jersey, Sahiwal x Jersey, Sahiwal x Holstein Friesian, Sahiwal x Red Dane and Sahiwal x Jersey x Holstein Friesian) available from Livestock Research Centre of the University over 30 years ( 1970 - 1999) were analyzed. The averages for these traits were 7.53 +/- 0.33 kg, 2.23 +/- 0.10 kg, 8.12 +/- 0.18 kg and 1.73 +/- 0.05 kg respectively. Genetic group and period had significant effect on all the traits. However, effect due to season was significant on First lactation milk yield/day of first lactation period and lifetime lactation yield/day of lifetime lactation period. The heritability estimates for these traits were 0.546 +/- 0.19, 0.763 +/- 0.22, 0.678 +/- 0.28 and 0.367 +/- 0.27 respectively. The genotypic and phenotypic correlations were highly positive and significant. It may be concluded that the performance of Sahiwal x Jersey, Rathi x Jersey, Sahiwal x Holstein Friesian and Sahiwal x Red Dane were better than the Sahiwal and triple crosses under the present study.

引用

页码：37 / 40

页数：4