Record Details

Estimates of genetic and phenotypic parameters for first lactation and lifetime performance traits in Hariana cattle

Indian Agricultural Research Journals

View Archive Info
 
 
Field Value
 
Title Estimates of genetic and phenotypic parameters for first lactation and lifetime performance traits in Hariana cattle
 
Creator DALAL, D S
RATHI, S S
RAHEJA, K L
 
Subject Cattle genetic correlations, Heritability, Lifetime performance traits, Phenotypic correlations
 
Description Data on 601 Hariana cows maintained at Government Livestock Farm, Hisar, during 1976-96 were used to estimate heritabilities, genetic and phenotypic correlations between first lactation and lifetime performance traits. Model used for estimation of sire and residual variance and covariance components included year-season of calving and sire genetic group as fixed effects and sire within sire genetic group as random effect. The averages for age at first calving (AFC), first lactation milk yield (FLMY), first lactation length (FLL), peak yield (FPY), first service period (FSP), first dry period (FDP) and first calving interval (FCI) were 1 443 ± 7.26 days, 1 081 ± 14.21 kg, 268 ± 2.15 days, 6.16 ± 0.06 kg, 192 ± 3.77 days, 210 ± 3.36 days, and 479 ± 3.88 days respectively. Herd life (HL), lifetime milk yield (LTMY), productive life (PL), no. of days in milk (ND) and milk yield per day of productive life (MY IPL) were 1 719 ± 29.80 days, 5 304 ± 118 kg, 1 629 ± 26.99 days, 1 033 ± 18.91 days and 3.10 ± 0.04 kg respectively. Heritability estimates for AFC, FLMY, FLL. PY, FSP, FDP and FCI were 0.38 ± 0.18, 0.11 ± 0.09, 0.22 ± 0.15, 0.10 ± 0.08, 0. 18 ± 0.11, 0.14 ± 0. 10 and 0.21 ± 0.11 respectively. Heritabilities for lifetime performance traits were lower than heritability estimates of first lactation traits. AFC had high negative genetic correlation with FLMY and PY. However, genetic correlation of AFC with FLL. FSP. FDP and FCI were high and positive. FLMY and PY had high positive genetic correlations with lifetime traits. The corresponding phenotypic correlations were also significant and positive. Results suggested that selection on the basis of AFC and FLMY would be expected to increase lifetime milk performance traits.
 
Publisher Directorate of Knowledge Management in Agriculture
 
Contributor —
 
Date 2014-02-06
 
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/37595
 
Source The Indian Journal of Animal Sciences; Vol 72, No 5 (2002)
0367-8318
 
Language eng
 
Relation http://epubs.icar.org.in/ejournal/index.php/IJAnS/article/view/37595/16849
 
Rights Copyright (c) 2014 The Indian Journal of Animal Sciences