Estimation of genetic parameter in Iranian Holstein crossbred dairy cattle | Zendy

Abolfazl Ghorbani | Zendy; Noubr Salamatdoust | Zendy; shahriar H Agdam | Zendy; S Nikzad | Zendy

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Estimation of genetic parameter in Iranian Holstein crossbred dairy cattle

Author(s) -

Abolfazl Ghorbani,

Noubr Salamatdoust,

shahriar H Agdam,

S Nikzad

Publication year - 2011

Publication title -

african journal of microbiology research

Language(s) - English

Resource type - Journals

ISSN - 1996-0808

DOI - 10.5897/ajmr10.875

Subject(s) - crossbreed , heritability , zoology , dairy cattle , restricted maximum likelihood , variance components , biology , veterinary medicine , microbiology and biotechnology , maximum likelihood , mathematics , statistics , medicine , genetics

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.

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