AAB Archives Animal Breeding AAB Arch. Anim. Breed. 2363-9822 FBN Dummerstorf Göttingen, Germany 10.5194/aab-54-323-2011 Association between genetic polymorphism of growth-hormone-releasing hormone and the yield, chemical composition and technological parameters of cow milk (Brief Report) Czerniawska-Piątkowska E. 1 Szewczuk M. 1 Zych S. 2 Laboratory of Molecular Cytogenetics, Department of Ruminant Science, The West Pomeranian University of Technology, Szczecin, Poland Laboratory of Vet Diagnostic »LaboWet«, Szczecin, Poland 10 10 2011 54 3 323 325 Copyright: © 2011 E. Czerniawska-Piątkowska et al. 2011 This work is licensed under the Creative Commons Attribution 3.0 Unported License. To view a copy of this licence, visit https://creativecommons.org/licenses/by/3.0/ This article is available from https://aab.copernicus.org/articles/54/323/2011/aab-54-323-2011.html The full text article is available as a PDF file from https://aab.copernicus.org/articles/54/323/2011/aab-54-323-2011.pdf

Somatoliberin or growth-hormone-releasing hormone (GHRH) belongs to a group of hypothalamic hormones. It induces an increase in the concentration of endogenous growth hormone in the blood serum of cattle (Løvendahl et al. 1991), increasing mean and pulsatile liberation of somatotropin and thus affecting indirectly an increase in the milk productivity of cows (Dahl et al. 1993). The study aimed at searching for associations between the variants of the <i>GHRH/Hae</i>III polymorphism, described for the first time by Moody et al. (1995), and production traits in the examined herds and comparing the technological usefulness of milk obtained from cows with different <i>GHRH</i> genotypes. According to Szewczuk et al. (2008), above mentioned polymorphism is the transversion A→C located at the position A44C within initial part of intron 2 (GenBank acc. no. EF210074).