Breed changeability of the number of le ukocytes in sheep bl ood depending on the seas on

Krasimir Boychev

Резюме: The aim of the study was to analyze the range of differentiation of the number of leukocytes in sheep blood and to evaluate the role of the breed appurtenance in the structure of total changeability of the hematological parameter discussed. The experiment was conducted with 395 sheep of four breeds (Awassi, East Friesian, Pleven blackheaded, Romanov) and cross breedings of the Synthetic Population Bulgarian Dairy sheep. The blood samples were taken in April, July, November and February from v. jugularis. The effect of the factor discussed during different seasons was evaluated by the coefficient of interclass correlation. The number of leukocytes in the blood of the investigated populations varies from 7.294x109/l for Pleven black-headed breed to 8.003 x109/l for Awassi breed. The registered total effect of the breed appurtenance was a minimal one – 1.08%. At the some time a significant effect of the season on the dynamics of the index discussed was registered in winter (20.91%; P<0.001).

Ключови думи: breed variability; number of leukocytes; seasonal effect.; sheep blood

Дата на публикуване: 2023-03-07