scholarly journals Correlation of performance traits of black-and-white first- calves

2021 ◽  
Vol 848 (1) ◽  
pp. 012072
Author(s):  
A S Gorelik ◽  
O V Gorelik ◽  
A V Miftakhutdinov ◽  
N P Smolyakova ◽  
S G Zernina
Keyword(s):  
Black And White ◽  
Performance Traits

scholarly journals Association between leptin combined genotypes and milk performance traits of Polish Black-and-White cows

2005 ◽  
Vol 48 (6) ◽  
pp. 547-554 ◽  
Author(s):  
H. Kulig
Keyword(s):  
Milk Protein ◽  
Fat Content ◽  
Black And White ◽  
Holstein Friesian ◽  
Performance Traits ◽  
Milk Performance ◽  
Combined Genotypes ◽  
Fat Yield

Abstract. The aim of this study was to estimate the relations between the leptin combined genotypes versus milk performance traits (yields of milk, protein, and fat, as well as protein and fat content). The investigation was performed on 860 Black-and-White cows with a different share of the of Holstein-Friesian genes, kept in Pomerania. Frequencies of the LEP-C3100T/Sau3AI genotypes were: CC/AA – 0. 315, CT/AA – 0.272 and CC/AB – 0.142. The frequencies of the remaining genotypes did not exceed 0.100. Statistically significant (P≤0.01) relation between the leptin combined genotypes (LEP-C3100T/Sau3AI) and milk, protein, and fat yield were observed. These traits were significantly higher in the CC/BB genotype cows.

scholarly journals Study of an association between SNP 775C>T within the bovine ITBG2 gene and milk performance traits in Black and White cows

2008 ◽  
Vol 52 (No. 1) ◽  
pp. 1-6 ◽  
Author(s):  
U. Czarnik ◽  
M. Galinski ◽  
Ch.S. Pareek ◽  
T. Zabolewicz ◽  
Z. Wielgosz-Groth
Keyword(s):  
Silent Mutation ◽  
Gene Encoding ◽  
Black And White ◽  
Holstein Friesian ◽  
Performance Traits ◽  
Milk Performance ◽  
Sib Families ◽  
Quality Of Milk ◽  
Theoretical Considerations

The exclusive pre-selective effect of BLAD carriers reproducing in the exposed Holstein-Friesian cattle population prompted to search for the candidate gene variants of high quality of milk performance traits within the bovine <i>ITBG</i>2 gene or loci linked with bovine <i>ITBG</i>2 gene. Theoretical considerations indicated that the &Idquo;silent mutation&rdquo; C&rarr;T localized at the position of 775 bp of the gene encoding the CD18 subunit might be a potential QTL marker of high milk productivity. An association study between the polymorphism of SNP 775C>T, and the diversification of milk performance traits was carried out on the progeny of four bulls with genotypes <i>BL/TL</i> and 775<i>C/T</i> and one bull with genotypes <i>TL/TL</i> and 775<i>C/T</i>. The results documented statistically significant differences in the protein content percentage of milk in two half-sib families of bulls with <i>BL/TL</i> and 775<i>C/T</i> genotype and one half-sib family of bull with <i>TL/TL</i> and 775<i>C/T</i> genotype. It was further concluded that the polymorphism of SNP 775C>T was found to be a more efficient QTL marker than that of D128G, since in all the analysed milk performance traits for half-sib families higher values of the F coefficient were obtained for the SNP 775C>T mutation in comparison with D128G.

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