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Research
(Published
online: 09-11-2014)
6.
Evaluation of efficiency of sire model and
animal model in Holstein Friesian crossbred cattle considering
first lactation production and fertility traits -
Shakti Kant Dash, Ashok Kumar Gupta, Avtar Singh, Atish
Kumar Chakravarty, Manoj Madhusoodanan, Jamuna Valsalan, Pushp Raj
Shivahre and Altaf Hussain
Veterinary World, 7(11): 933-937
doi:
10.14202/vetworld.2014.933-937
Shakti
Kant Dash:
Dairy Cattle Breeding Division, National Dairy Research Institute,
Karnal - 132 001, Haryana, India; Department of Animal Genetics
and Breeding, College of Veterinary Science, GADVASU, Ludhiana,
Punjab, India; shaktikant07@gmail.com
Ashok
Kumar Gupta:
Dairy Cattle Breeding Division, National Dairy Research Institute,
Karnal - 132 001, Haryana, India; guptaak2009@gmail.com
Avtar
Singh:
Dairy Cattle Breeding Division, National Dairy Research Institute,
Karnal - 132 001, Haryana, India; avtar54@gmail.com
Atish
Kumar Chakravarty:
Dairy Cattle Breeding Division, National Dairy Research Institute,
Karnal - 132 001, Haryana, India; ak_chakravarty@yahoo.co.in
Manoj
Madhusoodanan:
Department of Animal Breeding, Genetics & Biostatistics, CO&AS,
Trissur, Kerala, India; manojanchuvilayil@yahoo.co.in
Jamuna
Valsalan:
Dairy Cattle Breeding Division, National Dairy Research Institute,
Karnal - 132 001, Haryana, India; jamunavalsalan@gmail.com
Pushp
Raj Shivahre:
Dairy Cattle Breeding Division, National Dairy Research Institute,
Karnal - 132 001, Haryana, India; drpr06@gmail.com
Altaf
Hussain:
Dairy Cattle Breeding Division, National Dairy Research Institute,
Karnal - 132 001, Haryana, India; paltaf13@gmail.com
Received:
27-07-2014, Revised: 28-09-2014, Accepted: 04-10-2014, Published
Online: 09-11-2014
Corresponding author:
Shakti Kant Dash, e-mail: shaktikant07@gmail.com
Abstract
Aim:
The present investigation was conducted for evaluating the
efficacy of estimating breeding values (BVs) using univariate
animal model in comparison to sire model. The various parameters
considered for evaluating the efficiency of both linear models
were coefficient of determination (R2), coefficient
of variation (CV), within sire variance or error variance and
spearman’s rank correlation estimates.
Materials and Methods: Data for the present investigation were
spread over a period of 34 years from 1978 to 2012 and consisted
of a total of 1988 lactation records of Holstein Friesian
crossbred cows sired by 186 crossbred bulls.
Results: The percentage of sires having BV (estimated by
animal model) more than the average BV for the traits viz. age at
first calving (AFC), first service period (FSP), first lactation
length (FLL), first calving interval (FCI), first lactation 305
day milk yield (F305MY), first lactation total milk yield (FTMY),
milk yield per day of first lactation length (MY/FLL) and milk
yield per day of first calving interval (MY/FCI) were 48.05,
49.39, 55.07, 49.21, 50.00, 51.39, 48.67, 50.39%, respectively.
The animal model had higher R2,
lower CV and error variance for most of the fertility and
production traits. The spearman’s rank correlation estimates
indicated similarity of rankings by both the linear models as the
animal model is an improvement of sire model.
Conclusion: Animal model had a wider range of BVs indicating
the greater differentiating ability of the model. Based on R2,
CV and error variance animal model was found to be superior in
comparison to sire model.
Keywords: animal model, breeding value, efficiency, sire
model.
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