Karakul x Romanov crosses with varying genetic contributions from each breed were evaluated for their pelt production and fertility. The genetic contribution of each breed varied from 12,5 - 87,5%. Pelt quality improved as the genetic contribution of the Karakul…
The oestrous cycles of Karakul ewes were synchronized during both the breeding (February) and non breeding season (October) using either whole or halved sponges, in combination with either subcutaneous or intravenous administration of PMSG. At the time of sponge withdrawal,…
In the Karakul sheep of Southern Africa four major pelt types can be identified, namely pipe curl, developed shallow curl, shallow curl and watersilk types. A study of the foetal skin was undertaken to determine whether histological differences do exist…
The phosphorus (P) status of adult Karakul ewes grazing natural pasture was determined by measuring the P content of blood, saliva, faecal, and bone samples. The ewes were divided into four groups of 20 ewes each, viz. Ewes supplemented with…
Genetic parameters of 16 pelt traits and birth mass were calculated in a Karakul control flock (n = 2058; rams = 305) with a half-sib analysis. Moderately high heritabilities were estimated for pelt traits. No antagonistic genetic correlation was found…
Pelts of 2465 lambs from a randomly bred Karakul flock were subjectively evaluated within 24 h after birth, over a two-year period. The data were analysed with year of birth, birth status, month born, age of the dam and sex…
Genetic trends owing to selection for an increase in pattern and hair quality and a decrease in hair length and curl development in the Karakul were estimated with the Animal Model in four selection lines and in a control flock…
Heritability estimates were obtained by using a unitrait derivative-free animal model REML programme. Estimates of heritability for curl type (h 2 = 0.46) and pattern score (h 2 = 0.27) followed expectations as derived from literature. The estimate for hair…
