GENETIC STRATEGY OF HOMOZYGOUS AND HETEROZYGOUS BALANCE IN SHEEP POPULATIONS

Abstract

The main farmers goal is breeding of pure sheep breed outside the kinship. That way they want to preserve and improve qualities of the breed, such as high production of meat, milk or wool, strong construction, high fertility, length of productive life, health, etc. It is a challenge for breeders because it represents a management planning balance between homozygosity and heterozygosity. Breeding sheep in a purebred requires a certain level of genetically predictable homozygosity to promote desirable traits. Balancing is appropriate to avoid inbreeding depression. A particular problem arises in small populations, which have only hope in the line breeding system. This review paper discusses iptions to overcome this situation.