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COMPARATIVE ASSESSMENT OF THE RELATIONSHIP BETWEEN INTRABREED TYPES OF SIMMENTAL COWS AND SECTIONIZED TRAITS
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| Author:
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EKATERINA ANISIMOVA1*, ANDREY GEORGIEVICH KOSHCHAEV, ANTON ALEKSEEVICH NESTERENKO, ALEXE?ALEKSANDROVICH BAKHAREV, ALBINA GENNADEVNA ISAEVA, TATYANA MARATOVNA SHUVAEVA, TATYANA VALEREVNA KALASHNIKOVA
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| Abstract:
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The paper is devoted to studying the relationshipsamong the economically useful traits that are important for
breeding and can be used in breeding for creating animals of the desired type. It has been found that the productive
use of various types of animals at farms on the average amounted to 51.5 and 54.4 months, or was by 13.9 and 16.8
months (36.9 and 44.7 %) longer than that of meat and milk cows and, accordingly, their lifetime milk yields were
higher by 6.53 and 10.47 thous. kg. It has been found that there are positive relationshipsamong the milkiness index,
the duration of productive use, and lifetime milk yields of cows. It was the highest and the most veracious in the
animals of milk (r = 0.31 and 0.41) and meat and milk(r = 0.19 and 0.34) types. Long breeding of Simmental cattle by
the intrabreed production types will help increase the duration of the productive lifetime of cows, their lifetime milk
yields, and overall economic efficiency of breeding animals of required types. In creating highly productive herds of
Simmental cattle, particular importance is attached to the technological properties of the udder. The best
technological properties of the udder were found in milk andmilk and meat animals of the production types. The
exterior of their udders had the best scores (3.94 and 3.79 points).
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| Keyword:
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breeding, intrabreed production type, selection, genotypic correlation, phenotypic correlation, genotype, phenotype, heredity, pleiotropy, linking, correlation pleiades
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