Linkages between Lysozyme and Complement Levels and Some Productive Traits in Sheep


1 Institute of Agricultural Science, BG - 6000 Stara Zagora, Bulgaria
2 Trakia University, Department of Genetics, Faculty of Veterinary Medicine, BG - 6000 Stara Zagora, Bulgaria
3 Trakia University, Department of Genetics, Agrarian Faculty,BG - 6000 Stara Zagora, Bulgaria


DJORBINEVA, M., I. DIMITROV, L. SOTIROV, P. SLAVOVA and S. TANCHEV, 2005. Linkages between lysozyme and complement levels and some productive traits in sheep. Bulg. J. Agri. Sci., 11: 175-181

The present study aimed to elucidate the relationship between the characteristic production traits in the different types sheep breeds and the concentrations of lysozyme and complement as principal humoral factors of innate immunity. For this experiment the sheep from 3 productive types were included: A. Milk type crossings: 118 sheep - Stara Zagora × East-Friesian and (Stara Zagora × East-Friesian) × Blackhead Pleven breed included; B. Merino type: 80 sheep from the Trakia merino breed; C. Meat type: 107 sheep from the Ile-de-France breed and 107 sheep from the Charollais breed. In the milk type sheep, we investigated what was the correlation between lysozyme and complement concentrations and the quantity of milk obtained during the whole or milking lactation. The calculations showed that the correlation between lysozyme concentrations and the yields of both lactations was negative and feeble (r = from -0.15 to -0.17). The correlation between APCA and both lactation yields was feeble as well, but positive (r = from 0.12 to 0.14). The relationship between lysozyme and APCA was characterized with a negative and low correlation coefficient (r = -0.22; P < 0.05). Those data show, that the studied parameters were determined and expressed independently one from another and thus, an individual control and selection is needed.

Key words: lysozyme, sheep, productive traits