DESCRIPTION OF POPULATION-GENETIC PARAMETERS OF TROTTING BREED HORSES
I.Suprun
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National Universityof Life and Environmental Sciences of Ukraine, Heroiv Oborony str., 15; Kyiv, 03041, Ukraine
The use of population-genetic parameters with the high degree of objectivity allows to determine the pedigree value of animals and develop the plant-breeding programs effectively. Phenotypical changeability, correlation between traits, inheritance and their repetition are the major among stud-breeding-genetic parameters. The results of researches are based on materials of pedigree account of more than 800 horses (2002–2010 birth) of Orlov, Russian and French trotting breed, which are tested on the Kyiv hippodrome.
Arithmetic mean value, degree of changeability of genetic parameters of playfulness and measures of trotting breed horses, inheritances of their playfulness, correlation, are studied between separate stud-breeding descriptions, and also force of factors influence on playfulness, height in withers, slanting length of body, circumference of breast in shoulder-blades and circumference of metacarpus of horse of trotting breeds is studied.
Comparison of playfulness of stallions and mares of Orlov trotting breed of all age categories testifies in behalf on stallions playfulness. An authenticity (р>0.99) difference between sexes is 5.52 с.
Among three trotting breeds the senior age horses of Orlov trotting breed have the greatest playfulness.
Repetition of results of hippodrome tests on distance 1600 meters for the horse of Orlov trotting breed two and three-yeared age is 0.60 at Р>0.95. This index is higher than middle level of traits repetition, that allows to conduct the effective selection with two year aged horses, forecasting their further playfulness.
The greatest coefficient of inheritance was got at the pair of mother-daughter and mothers-sons. So it is possible with probability of 36–44 % to expect the same descendants from mothers with high playfulness. In relation to prognostication of descendant’s playfulness by the results of fathers, more reliable it is for sons.
Keywords: ОRLOV, RUSSIAN, FRENCH TROTTING BREEDS OF HORSE, PLAYFULNESS, HEIGHT IN WITHERS, SLANTING LENGTH OF BODY, CIRCUMFERENCE OF BREAST IN SHOULDER-BLADES, CIRCUMFERENCE OF METACARPUS, ARITHMETICAL MEAN VALUE, VARIABILITY, COEFFICIENT OF VARIATION, COEFFICIENT OF INHERITANCE, CORRELATION
