THE SIGNIFICANCE OF RAM BREED AND EWE BREED IN CROSSBREEDING FOR MEAT PRODUCTION FROM SHEEP IN AN INTENSIVE SYSTEM

Effect of ewe breed on the reaction time and semen characteristics in the ram

The aim of this study was to determine the effect of ewe breed on the reaction time and semencharacteristics in the ram. For this purpose, from the native sheep breeds in Iran, seven Lory rams and fourewes (two Lory and two Ghezel breeds) were selected. Seven rams were individually subjected to 4 weeklytrials in which one of the following two treatments was applied alternately. All of rams were...

Breed Use and Crossbreeding in Goat Production

Zinc-responsive dermatosis in an Iranian cross-breed ram

An adult (two years old) Iranian cross-breed ram with alopecia, rough hair coats, thick and wrinkled skin,especially on the face, brisket, scrotum, tail and legs, presented with severe pruritus, poor condition andgeneralized unthriftiness. The animal was referred to the Veterinary Clinic of Shahid Bahonar University ofKerman. The vital signs and haematologic indices of the animal were normal. A...

1 Fundamental Aspects of Crossbreeding of Sheep : Use of Breed Diversity to Improve Efficiency of Meat Production

Breed diversity is a valuable resource of the sheep industry. Crossbreeding systems use breed diversity to increase productivity relative to purebred flocks. Crossbreeding systems vary in managerial complexity and in use of beneficial effects due to crossbred ewes and lambs. Efficiency of meat production is maximized in terminal crossbreeding systems by use of specialized sire breeds to complem...

Effects of ewe breed and management system on efficiency of lamb production: I. Ewe productivity.

Performance of 1/2-Suffolk, 1/2-Rambouillet (Western) and 1/2-Suffolk, 1/4-Rambouillet, 1/4-Finnsheep (1/4-Finn) ewes was compared in three different lamb production systems over 3 yr. System 1 (56 ewes) involved late fall lambing over 84 d. System 2 (51 ewes) involved January and February lambing for 60 d. System 3 (47 ewes) involved March and April lambing for 45 d. Pregnancy rates for yearli...