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Evaluering van verskillende raskruisings in die ontwikkeling van 'n witwolvleisras: Die Afrino

 J.J. Olivier, P.G. Marais en J.A.N. Cloete

Carnarvon-proefplaas, Carnarvon  

 

Evaluation of different breed crosses in the development of a white-woolled mutton sheep: The Afrino.

Owing to injudicious crossbreeding of non-woolled sheep with the Merino, a need originated for a breed which is free from kemp and coloured fibres and which could produce a good slaughter Iamb on the Merino ewe. A request from the S.A. Agriculture Union to the Department of Agriculture in this connection led to breed development which started in 1969 at the Carnarvon Experimental Farm. Six different crosses were made mainly with the Merino ewe (M) and White Dorper (WD), Dorset Horn (DH), Ronderib Afrikaner (RA), Van Rooy (VA) and S.A. Mutton Merino rams (SAVM). Pure White Dorpers and Merino flocks were also maintained. On average from 1972 to 1975 in which only F2 and F3 progeny were evaluated, the 25% M, 25% AA and 50% SAVM - crosses were the highest performers in respect of reproduction, growth and in a lesser extent wool production. An average of 61,8% Iambs were weaned per ewe available for mating. The average corrected 100-day mass of this cross was 35,56 ± 3,19 kg and 31,58 ± 3,29 kg for rams and ewes respectively. The 12-month and 18-month mass of this cross, together with that of the pure White Dorper and M x WD x SAVM-cross were the highest. At the age of 18 months this cross shore an average of 1,77 ± 0,47 kg clean wool. The average fibre thickness was 22,29 ± 2,41 μm. Since 1976 this was the only cross used for further development and is currently known as the Afrino.

S. Afr. J. Anim. Sci. 1984, 14: 105 -109

 

Published

Suid-Afrikaanse tydskrif vir veekunde 14 (2)