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Оценка молочной продуктивности коров разных пород в связи с полиморфизмом по гену альфа-лактальбумина

Оценка молочной продуктивности коров разных пород в связи с полиморфизмом по гену альфа-лактальбумина

Abstract

The directions a priority of new breeding dairy cattle related with the improvement of existing and the search of new genetic methods, as well as application of marker assisted selection. Milk protein genes are considered to be the most suitable genetic markers, were attributed to the quantitative and qualitative levels of milk production animals. The purpose of the study to improve dairy cattle breeding using DNA markers associated with milk production traits. In this paper examined materials from primiparous cows by breed cattle of Black and White, Kholmogor, Simmental and Brown Swiss. In the studied breeds of cattle (black-and-white, simmental, kholmogorskaya, brown swiss) found differences characteristic frequency of allelic variants of the gene alpha-lactalbumin (LALBA), however, the highest rate was observed for the allele A (71,0%), genotypes AA (49,0%) and AB (43.8%). The research results showed lack of significant associations between estimated traits a milk production and alpha-lactalbumin gene polymorphism except of percent protein in milk. The direction of this relation points to the desired allele A gene LALBA for selection of animals to the high content of protein in milk (+0,031%, F = 2,9, P

Приоритетные направления современной селекции молочного скота связаны с совершенствованием существующих и поиском новых генетических методов, применением маркер-зависимой селекции. Наиболее удобными генетическими маркерами, обусловливающими количественный и качественный уровни молочной продуктивности животных считаются гены белков молока. Исследования проводили с целью совершенствования селекции крупного рогатого скота с использованием ДНК-маркеров, ассоциированных с показателями молочной продуктивности. В работе проанализированы материалы по коровам-первотелкам черно-пестрой, холмогорской, симментальской и бурой швицкой пород. В исследуемых породах выявлены различия частотной характеристики аллельных вариантов гена α-лактальбумина. Наибольшая частота отмечалась по аллелю LALBA a (71,0 %) и генотипам LALBA aa (49,0 %) и LALBAr a (43,8 %). Достоверные ассоциативные связи между оценочными показателями молочной продуктивности и полиморфизмом гена α-лактальбумина за исключением белковомолочности отсутствуют. Направление установленной связи указывает на желательность при отборе животных на повышенное содержание белка в молоке аллеля А гена LALBA (+0,031 %, F=2,9, р

Keywords

КОРОВА-ПЕРВОТЁЛКА, МОЛОЧНАЯ ПРОДУКТИВНОСТЬ, ПОЛИМОРФИЗМ, ГЕН, АЛЬФА-ЛАКТАЛЬБУМИН

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
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