NDLI: Monitoring the highest breeding groups of Kholmogor cows

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Monitoring the highest breeding groups of Kholmogor cows

Content Provider	Springer Nature Link
Author	Bagal, I. E. Yaluga, V. L. Pavlova, I. Yu. Kalashnikova, L. A.
Copyright Year	2014
Abstract	This article presents the results of monitoring the highest breeding groups of Kholmogor cows for the frequency of the κ-casein and β-lactoglobulin genotypes in 2010–2013. In 2010, the κ-casein genotypes AA and AB were detected, respectively, in 70% and 28% of cows, while less than 2% of cows had the genotype BB and the A and B alleles were met at the frequencies of 0.84 and 0.16, respectively. The frequency of the B allele increased in 2013 to 0.20 against a decrease in the frequency of the AA genotype to 66% and the increased frequency of the BB genotype to 5%. Nearly half of the cows in 2010 had the β-lactoglobulin BB genotype (46%). The genotypes AB and AA were met at a frequency of 26–28%. The frequencies of the A and B alleles accounted, respectively, for 0.4 and 0.6. The frequency of β-lactoglobulin alleles remained unchanged in 2013. The frequency of the AB genotype increased from 28% to 45% against a decrease in the frequency of homozygous genotypes AA and BB up to 17% and 38%, respectively. We have revealed eight complex κ-casein/β-lactoglobulin genotypes. In 2010, the frequencies of the genotypes accounted 31% for AA/BB, 21% for AA/AB, 18% for AA/AA, 16% for AB/BB, 8% for AB/AB, 5% for AB/AA, and less than 1% for the BB/AB and BB/BB genotypes. The genotype BB/AA remained unfound. In 2013, the distribution of the genotypes changed. The AA/AB and AA/BB genotypes reached 30% and 24%, respectively, while the AB/AB genotype was met in 15%. The frequencies of the AA/AA, AB/BB, AB/AA, BB/BB, and BB/AB genotypes accounted for 12%, 10%, 5%, 3%, and 2%, respectively. Therefore, the percentage of cows with the homozygous AA/AA genotype that is undesirable by its technological traits of milk has shrunk from 18% to 12%.
Starting Page	467
Ending Page	469
Page Count	3
File Format	PDF
ISSN	10683674
Journal	Russian Agricultural Sciences
Volume Number	40
Issue Number	6
e-ISSN	19348037
Language	English
Publisher	Allerton Press
Publisher Date	2015-01-30
Publisher Place	Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	cattle Kholmogor breed κ-casein β-lactoglobulin Agriculture Plant Biochemistry
Content Type	Text
Resource Type	Article

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