Effects of udder traits on the milk yield of sheep

Abstract. In order to determine the possible effects of udder traits on milk yield and milk composition a serial of experiments were carried out on five different sheep farms, between 1998–2000.

Ten breeds and genotypes were included in these experiments: Merino, (Merino x Pleven Blackhead) F₁, Pleven F₁ x Black East Friesian, Lacaune, (Merino x Lacaune) F₁, British Milksheep, (Merino x British Milksheep) F₁, Awassi, (Merino x Awassi) F₁, Milking Tsigai. The udder traits (type, size, teat size) were determined individually at the time of the first test milking, within two weeks after the weaning in each year. Milk yield was measured in every four weeks (morning and evening).

Data collected were processed using LSLMW and MIXMDL (HARVEY, 1990) program.

Differences among and within the genotypes in udder characteristics were summarised and presented in tables and figures.