science-review.ru
Scientific journal
Scientific Review. Biological science
ISSN 2500-3399
ПИ №ФС77-57454
ISSN 2500-3399
ПИ №ФС77-57454
A GENETIC STATE OF KUSHUMSKAYA BREED MARES IN ASTRAKHAN REGION
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Genetic state of 367 kushumskaya breed mares in Astrakhan region is set by examining of pedigrees. The number of unique ancestors of the first row with his father’s ancestry and his mother’s side, the absolute and relative number of their daughters in the broodstock, the dependence of the relative number of ancestors of the first row of the absolute and relative number of their daughters in the broodstock were studied. The ancestors of the first row of paternal ancestry have been (per 100 mares broodstock) 25.4 stallions, and on the maternal side - 79.6 mares. Regression equation of the power function allows to approximate relationship the proportion of ancestors of the first row of the absolute number of their daughters in the broodstock, as well as their share in the broodstock with a high level of confidence (R2 = 0,8819-0,9243). Regular decrease in the proportion of the ancestors of the first row as the increasing rate of the absolute and relative number of their daughters in the broodstock, more pronounced on the maternal side, was revealed by the present study. Thus, the detected level of the proportion of unique ancestors on the paternal and maternal mares broodstock of kushumskaya breed in Astrakhan region reflects the degree of their genetic diversity. Genealogical structure of mares broodstock of kushumskaya breed in Astrakhan region at the level of the first row of ancestors can be reliably reflect the regression equation of the power function.