Paper Information

Journal:   IRANIAN JOURNAL OF ANIMAL SCIENCE (IRANIAN JOURNAL OF AGRICULTURAL SCIENCES)   FALL 2015 , Volume 46 , Number 3; Page(s) 271 To 276.
 
Paper: 

REPRODUCTIVE CONSEQUENCES OF USING SEXED SEMEN IN HOLSTEIN DAIRY HERDS OF ISFAHAN PROVINCE

 
 
Author(s):  JABAR ZAREH ALI, SADEGHI SEFIDMAZGI ALI*, GHORBANI GHOLAM REZA
 
* DEPARTMENT OF ANIMAL SCIENCE, FACULTY OF AGRICULTURE, ISFAHAN UNIVERSITY OF TECHNOLOGY, IRAN
 
Abstract: 

The objective of this study was to explore the reproductive consequences of using sex-sorted semen on sex ratio, conception rate and reproductive disorders (dystocia, abortion, stillbirth) in Holstein heifers. Reproduction performances records which were collected during 2006 to 2013 from 4 large dairy herds in Isfahan province of Iran were used and analyzed by GENMOD procedure of SAS software. Rate of female born of sexed semen (86.3%) was 1.8 times higher than those of conventional semen (48.5%). Conception rate was generally decreased in three first services from 61.0% to 47.2% (P<0.001) in group of using sexed semen. Use of sexed semen was significantly decreased the incidence of dystocia in heifers (from 20.3% to 16.8%). There was no significant difference in abortion and stillbirth incidences between two groups of semen (P>0.05). The results of this study can used for analyses of cost- revenue for using sex-sorted semen dairy herds.

 
Keyword(s): DAIRY COW, REPRODUCTION PERFORMANCE, SEXED SEMEN
 
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