Response to selection for milk yield and lactation length in buffaloes

被引：5
|
作者：
Khan, MS [1 ]
机构：
[1] Univ Agr, Dept Anim Breeding & Genet, Faisalabad 38040, Pakistan
来源：
ASIAN-AUSTRALASIAN JOURNAL OF ANIMAL SCIENCES | 1997年 / 10卷 / 06期
关键词：
selection; milk yield; lactation length; buffaloes;
D O I：
10.5713/ajas.1997.567
中图分类号：
S8 [畜牧、 动物医学、狩猎、蚕、蜂];
学科分类号：
0905 ;
摘要：
A multiple trait animal model having milk yield and lactation length was used to estimate genetic parameters using data from four institutional herds and four field recording centers. Response to selection for milk yield alone and in combination with lactation length was estimated by using principles of genetic theory. Lactation records (n = 2,353) adjusted for age at calving to 60 months were utilized. Milk yield was 17% heritable with repeatability of 0.44. Lactation length had a low heritability of 0.06 with repeatability of 0.16. Genetic correlation between the two traits was 0.70. Selection response in milk yield can be improved slightly (103.8 vs 102.8 kg) when information on covariance with lactation length is used together with the information on milk yield.
引用
收藏
页码：567 / 570
页数：4
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