Paper Information

Journal:   JOURNAL OF ANIMAL SCIENCE   FALL 2010 , Volume 3 , Number 3; Page(s) 51 To 63.
 
Paper: 

ESTIMATION OF INDIVIDUAL AND MATERNAL HETEROSIS IN IRANIAN BROWN SWISS CROSSBRED POPULATION

 
 
Author(s):  GORBANI A.*, MIR ASHTIANI R., MORADI SHAHRE BABAK M., SALAMATDOOST R., GHIASI GHALEKANDI J.
 
* DEPARTMENT OF ANIMAL SCIENCE, ISLAMIC AZAR UNIVERSITY, SHABESTAR BRANCH, IRAN
 
Abstract: 

In this study, individual and maternal heterosis of milk yield, fat yield, fat percent and milk days traits were estimated for Brown Swiss and indigenous crossbred dairy cattle using data from Centre Breeding country collected between 1991 to 2002. Average for mentioned traits are 2489.19, 117.5 kg, 3.83 percent and 252 days respectively. Share of the foreign breed gene, individual and maternal heterosis were calculated using the least squares: 10.38, 3.16 and -2.19 kg for milk and 0.12, 0.0342 and 0.029 kg for fat yield and 0.00457, 0.00131 and -0.00132 percent for fat percent, -0.54, -0.174 and 0.277 days for the milk days trait than the mean, respectively.
Generally, the results of this study showed that crossbred animal with 50 to 70 percent share of the foreign breed of traits have had a better status.

 
Keyword(s): GENETIC PARAMETER, CROSSBREEDING, HETEROSIS, BROWN SWISS
 
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