Possibilities of milk production increase in sheep by using crossbreeding

Abstract

This paper presents results of effects of crossbred Svrljig sheep x East Friesian sheep on milk production results and milk fat content. It is found that there were highly significant differences (P lt 0,001) in milk production among Svrljig sheep, East Friesian sheep and their crossbreeds. The East Friesian sheep produced more milk than Svrljig sheep and their crossbreeds by 53,44% and 46,11%, respectively. The average milk yield amounted to 74.12 kg, 113.73 kg and 108.30 kg in Svrljig sheep, East Friesian sheep and their F1 crossbreeds, respectively. The corresponding average percentage of milk fat amounted: 7,66, 6,68 and 6,96%, respectively.

U ovom radu prikazani su rezultati uticaja ukrštanja između svrljiške pramenke i istočnofrizijske rase ovaca na prinos mleka i sadržaj mlečne masti kod meleza F1 generacije. Podaci pokazuju da postoje vrlo visoko statistički signifikantne razlike (P lt 0,001) u prinosu mleka između ovaca svrljiške pramenke, s jedne strane, i ovaca istočnofrizijske rase, kao i meleza F1 generacije navedenih rasa. Naime, ovce istočnofrizijske rase proizvele su više mleka od ovaca svrljiške pramenke za 53,44%, a melezi 46,11%. Prosečna proizvodnja mleka bila je 74,12 kg svrljiška; 113,73 kg istočnofrizijska i 108,30 kg melezi. Prosečan sadržaj mlečne masti istim redosledom tretmana bio je (7,66; 6,68; 6,96%). Međutim, kako je korelacija između količine mleka i % mlečne masti negativna navedene vrednosti su i očekivane.