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Genetic polymorphims in the growth hormone (GH) gene were studied in 410 Holstein dairy cows. Genotyping was carried out using PCR-RFLP. Data were analyzed by the MIXED procedure to reveal the effect of GH genotypes on reproductive traits. GH-AluI had a favorable effect on exanimate traits except for the age at the first calving. The homozygous LL genotype seemed to be advantageous for calving interval and days open. A significant effect of different GH-AluI–MspI combined genotypes was found.
AAB | Articles | Volume 61, issue 4
Arch. Anim. Breed., 61, 481–489, 2018
https://doi.org/10.5194/aab-61-481-2018
Arch. Anim. Breed., 61, 481–489, 2018
https://doi.org/10.5194/aab-61-481-2018

Original study 19 Dec 2018

Original study | 19 Dec 2018

Assessment of growth hormone gene polymorphism effects on reproductive traits in Holstein dairy cattle in Tunisia

Sihem Amiri et al.

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Latest update: 25 Feb 2021
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Short summary
Genetic polymorphims in the growth hormone (GH) gene were studied in 410 Holstein dairy cows. Genotyping was carried out using PCR-RFLP. Data were analyzed by the MIXED procedure to reveal the effect of GH genotypes on reproductive traits. GH-AluI had a favorable effect on exanimate traits except for the age at the first calving. The homozygous LL genotype seemed to be advantageous for calving interval and days open. A significant effect of different GH-AluI–MspI combined genotypes was found.
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