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Effect of non-genetic factors on herd life, selective value and its components in Holstein Friesian cows

Indian Agricultural Research Journals

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Title Effect of non-genetic factors on herd life, selective value and its components in Holstein Friesian cows
 
Creator GOSHU, GEBEYEHU
SINGH, HARPAL
PETERSSON, KARL-JOHAN
 
Subject Age at first calving, Birth season, Coefficient of gene replication, First lactation milk yield, Holstein Friesian
 
Description Records of 364 Holstein Friesian cows were analyzed to study the fixed effect of age at first calving, first lactation milk yield, season and year of birth on lifetime traits using general linear model. The overall least squares means were 2,864±63 days, 1,638±58 days, 3.55±0.12, 1.68±0.07, 1.12±0.06 and 0.56±0.03 for longevity, productive herd life, total calves, female calves, selective values and coefficient of gene replication. The cows with >1,500 kg first lactation milk yield had minimum longevity of 2,170±329 days as well as shortest productive herd life of 869±330 days. Cows calved at early age had lowest productive herd life of 919±366 days. Lesser number of total and female calves was produced by cows with very short age at first calving. Cows with intermediate first lactation milk yield (2,066–3,195 kg) produced more normal and female calves. Selective values and coefficient of gene replications were not statistically affected by the above non-genetic factors. Year of birth highly influenced all the traits. The study showed that better nutrition and follow-up is needed for cows calving at early age.
 
Publisher Directorate of Knowledge Management in Agriculture
 
Contributor —
 
Date 2014-01-30
 
Type info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
—
 
Format application/pdf
 
Identifier http://epubs.icar.org.in/ejournal/index.php/IJAnS/article/view/37309
 
Source The Indian Journal of Animal Sciences; Vol 84, No 1 (2014)
0367-8318
 
Language eng
 
Relation http://epubs.icar.org.in/ejournal/index.php/IJAnS/article/view/37309/16685
 
Rights Copyright (c) 2014 The Indian Journal of Animal Sciences