Sourses of Specific Variance and Genetic Determination of the Earnings in Horses
from Arabian Breed


Buffalo Research Institute with Biotechnology Center, BG-9700 Shoumen, Bulgaria


SABEVA, I., 1999. Sources of specific variance and genetic determination of the earning in horses from Arabian breed. Bulg. J. Agric. Sci., 5: 769-772

The investigation has been accomplished on the basis of nonorthogonal set of data including the results from the own productivity trails of horses from Shagia type and Thoroughbred Arabians, born in the stud Kadiuk during the last generation intervals. The variance analyses and the estimations of inheritance have been treated by mixed model methodology.
The total phenotypic variety of 1g of the earned marks at different degrees of probability has been influenced by the lineal belonging of the horses and their mothers, the breeding type, the type of the trail and trainers. Sex has been a sourse of specific variance only in horses from Shagia type. There has been ascertained average high genetic variety of the studied trait. The bigger part of the genetic variance in the Thoroughbred Arabian horses and Shagia type comes from the long use of small number of stallions in a limited herd.
Key words: horses, Arabian breed, genetic determination, earning, specific variance