VET space / 수의대생 블로그

B12 Estimation of breeding value in beef cattle Places of investigation: In field- farm, race, place, open range, exhibition. The breeding value estimation done at the farm evaluates the performances at the real place of production. In station- centralized test station, individual feeding, control of live weight, evaluation of meatiness through ultrasound (rib eye area, live weight, cannon girth..

B3 Breeding methods in cattle production: purebred breeding, crossbreeding Breeding Systems Natural: Harem (group of 1-2 males and number of females with their offspring), stud (such as a stud farm) or hand (Hand breeding – where the time & mating individuals are selected by the breeder) Beef production Sex ratio = 40-50 (60-79) ​AI- artificial insemination: Predominantly used in dairy industry ..

B13 Elements of beef cattle breeding technologies ​Pregnancy length of beef cattle: 282 days Birth: Mostly occurs during spring, but there can be an additional calving period 6 months later Suckling for 6-8 months Cow-calf system. Should be as cheap as possible and as extensive as possible Can be on the pasture Extra feed for the calves and not for the cows Weaning: 200 days old, around 200 kg. ..

B1. Domestication of cattle, micro-evolutionary consequences, related species, inter-species hybrids Taxonomy of cattle & its relatives: Kingdom: animals (Animalia) Phylum: vertebrates (chordata) Class: mammals (mammalia) sub class: placentalia Order: hoofed animals (ungulates) Sub-order: even toed (Artiodactyla) Section: ruminants Family: cattle like (bovidae) Number of chromosomes vary btw 50-..