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Agro-Science
Journal of Tropical Agriculture, Food, Environment and Extension
 

ISSN 1119-7455
   
 
         
 
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Article No 2 of Volume 2.2 (2003)
 
    
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INCREASING TWINNING RATE IN BEEF CATTLE THROUGH EMBRYO TRANSFER

D. Norris

 School of Agriculture and Environmental Sciences

University of the North, P/BagXI106. Sovenga. South Africa

E-mail: norrisd@unorth.ac.za

 

ABSTRACT

Thirty-nine Limousin X Friesian heifers and forty-five Limousin X Friesian cows were randomly allocated to three treatments in a twin-induction breeding program. Animals were inseminated twice with Limousin semen (treatment A) or inseminated twice also with Hereford semen and each implanted with one embryo 7 days later (treatment B) or implanted with three embryos without prior insemination (treatment C). The pregnancy rates were 0%. 28% and 45% respectively. The twinning rates obtained in  the three treatments were 59%, 64% and 56% respectively. There were three abortions in treaent B and six in treatment C. Twins had lower birth weight (38.5kg versus 29.1kg)and in the first seven weeks then twins (1.22kg/day versus 0.87kg/day). Transfer of three embryos to unbred recipients forms another potential method of inducing twinning in beef cattle.

 

Key words: Embryo transfer: twinning rates

Full Article (21.24Kb) | All Articles in Volume 2.2
 
 

Date:26/09/2018
 
     
 
 
 
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