Volume 8, Issue 17 (1-2018)                   rap 2018, 8(17): 93-98 | Back to browse issues page


XML Persian Abstract Print


Download citation:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:

Estimation of Genetic Parameters for Lameness Trait and Its Relationship with Milk Production Traits in Iranian Holstein Cows. rap. 2018; 8 (17) :93-98
URL: http://rap.sanru.ac.ir/article-1-871-en.html

Abstract:   (46 Views)
In this study, estimation of genetic parameters of Lameness and genetic and phenotypic correlations between Lameness and milk, fat and protein yield were performed. The data obtained from 63403 Holstein cows were collected from the Animal Breeding Center of Iran between 2001 to 2013 Estimation of genetic parameters for lameness was performed by univariate animal and Threshold models. Also, estimation of genetic and phenotypic correlations between Lameness and production traits was performed by bivariate animal model by using the ASREML Software. Results showed that heritability of Lameness with Animal and Threshold models were 0.02 and 0.057, respectively. Estimated heritabilities with two methods were low, but with Threshold model were more than linear model, also genetic correlations between Lameness and persistency of milk, fat and protein yield were 0.31, 0.23 and 0.27, respectively and phenotypic correlations between Lameness and persistency of milk, fat and protein yield were 0.048, 0.037 and 0.029, respectively. Positive correlations between Lameness and production traits show that long term selection for production traits could be the most important factor for culling by Lameness disorders.
Full-Text [PDF 350 kb]   (20 Downloads)    
Type of Study: Research | Subject: Special

Add your comments about this article : Your username or Email:
Write the security code in the box

© 2015 All Rights Reserved | Research On Animal Production(Scientific and Research)

Designed & Developed by : Yektaweb