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Abstract
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Article Information:
Comparison of Additive Genetic Parameter in Two Iranian Crossbred Population
A. Gorbani, R. Salamatdoust Nobar, U. Mehman Navaz, K. Nazer Adl, H. Agdam Shahriar and G.J. Gyasi
Corresponding Author: Abol Fazl Gorbani
Submitted: 2011 May, 02
Accepted: 2011 June, 07
Published: 2011 August, 30 |
Abstract:
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The performance of crossbred cattle in Iran was considered across years 1991-2003. Crossbred
animals were results of Holstein×Indigenous (H×I) and Brown Swiss×Indigenous (B×I) crossbreeding systems
.These two population were considered separately. The research results showed that production potential has
been increased by crossbreeding, and crossbred animals with 50-70% of Holstein or Brown Swiss blood ration
have showed higher performance. Variance component were estimated using animal model (single trait) and
Derivative-free restricted Maximum Likelihood method for different traits. The estimation of the heritability
for milk yield, fat yield, and fat percentage and milk days were 0.332, 0.34, 0.23 and 0.26 respectively for
single models in (H×I) population. In (B×I) population the estimation heritability were 0.2374, 0.1629, 0.17
and 0.338 respectively for milk yield, fat yield, fat percentage and milk days traits. The result showed that
additive genetic variance share in Holstein crossbred higher than others.
Key words: Brown Swiss, crossbreeding, genetic parameter, heterosis, , ,
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Cite this Reference:
A. Gorbani, R. Salamatdoust Nobar, U. Mehman Navaz, K. Nazer Adl, H. Agdam Shahriar and G.J. Gyasi, . Comparison of Additive Genetic Parameter in Two Iranian Crossbred Population. International Journal of Animal and Veterinary Advances, (4): 238-240.
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ISSN (Online): 2041-2908
ISSN (Print): 2041-2894 |
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