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Association of GHR|AluI gene polymorphism with body weight parameters in Grati-PO cattle

*H. Hartati orcid  -  Indonesian Beef Cattle Research Station, Indonesian Agency for Agricultural Research and Development, Ministry of Agriculture of Indonesia, Indonesia
A.A.R. Hapsari  -  Indonesian Research Institute for Animal Production (IRIAP), Indonesia
B. D. P. Soewandi  -  Indonesian Research Institute for Animal Production (IRIAP), Indonesia
S. Anwar  -  Research Center for Biotechnology, National Research and Innovation Agency (BRIN), Indonesia
S. P. Rahmadani  -  Graduate Student of Animal Husbandry, University of Jambi, Indonesia
A. Aryogi  -  Indonesian Beef Cattle Research Station, Indonesian Agency for Agricultural Research and Development, Ministry of Agriculture of Indonesia, Indonesia
D. Pamungkas  -  Indonesian Beef Cattle Research Station, Indonesian Agency for Agricultural Research and Development, Ministry of Agriculture of Indonesia, Indonesia
Open Access Copyright (c) 2021 Journal of the Indonesian Tropical Animal Agriculture

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Abstract
The growth hormone receptor (GHR) gene is member of the class I cytokine receptor family that important in growth regulation including in cattle. This study aimed to analyze the association between GHR|AluI gene with body weight, parameters in Grati-PO cattle population. A total of 304 blood samples were collected from the experimental station at the Beef Cattle Research Station, which were also equipped with 304 phenotypic data. DNA was extracted using a zymo extraction kit. Detection of of the polymorphism of GHR gene using PCR-RFLP method with AluI restriction enzymes. polymorphism indicators include genotype frequency, allele frequency, Hardy-Weinberg Equilibrium, observed heterozygosity (Ho), expected heterozygosity (He), polymorphism information content (PIC) and number of effective alleles (Ne). Association analysis was carried out using a linear mixed model. The performance of birth weight, weaning weight, yearling weight and 18 months weight were 25.4 + 0.2 kg; 113.8 + 2.3 kg; 159.9 + 2.7 kg and 213.7 + 3.6 kg, respectively. The result of association analysis was significant (P<0.05) on weaning weight, yearling weight and 18 months weight. It could be concluded that the GHR gene has potential to be a candidate genetic marker for growth traits in Grati-PO cattle.
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Keywords: Body weight; Growth hormone receptor; Polymorphism; PO-Grati cattle

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