ISSN 2736-1756
Advanced Journal of Microbiology Research ISSN 2241-9837 Vol. 13 (3), pp. 001-003, March, 2019. © International Scholars Journals
Short Communication
Estimation of genetic parameter in Iranian Holstein crossbred dairy cattle
Ghorbani A.1*, S. Miraii Ashtiani2, Salamatdoust Noubr1, Agdam shahriar H.1 and Nikzad S.1
1Department of Animal Science, Islamic Azad University, Shabestar Branch, Shabestar, Iran.
2Department of Animal Science, University of Tehran, Tehran, Iran.
Accepted 07 January, 2019
Abstract
The performance of Holstein × Indigenous (H×I) crossbred dairy cattle in Iran was considered between 1991 and 2003. Milk, fat yield and fat percentage traits were considered in this research. Variance components were estimated using animal model (single trait) and derivative-free restricted maximum likelihood method for different traits. Crossbred animals with 50 to 70% of Holstein gene ratio have shown higher performance. The average performances for the mentioned traits were 2722.68, 122.97 and 3.97%, respectively. The estimation of the heritability for milk yield, fat yield, and fat percentage were 0.332, 0.3277 and 0.145. The research results showed that production potential has been increased by crossbreeding.
Key word: Genetic parameter, crossbreeding, Holstein.