Study of the Genetic Phenotypes of the Gene for Growth Differentiation Factor (GDF9) and its Relationship to some Reproductive Traits of Domestic Male Goats During the Summer

Amal Hamdi Jassim*(1) and   Salih Hassan Al-Azzawi (1)

(1). Department of Animal Production, College of Agriculture, University of Diyala, Iraq.

(*Correspondinga uthor:Amal Hamdi Jassim.E-mail: ).   

Received: 20/12/2021                 Accepted: 2/04/2022 


 This study was conducted in the animal field Department of Animal Production – College of Agriculture – University of Diyala as well as the Molecular Genetics Laboratory in the college for the period from 15/6/2021 to 9/15/2021, with the aim of determining the genetic manifestations of the Growth Differential Factor (GDF9) gene and its relationship to some Reproductive traits in a sample of 15 male black goats The polymorphism of the GDF9 gene differed in the male goat sample and was 67, 27 and 6% for each of the genotypes CC, CA and AA, respectively, and the variation between these percentages was not significant and gene frequency 0.8 and 0.2 for allele C and G, respectively. The results of the current study showed that there was no significant effect on testis dimensions during the study period, as for semen quality, we notice a significant increase in the number of sperms in the ejaculate and the Acrosome integrity in favor of the (CC) gene in July In August, the CC gene was superior in the number of sperms in the ejaculate, while the integrity of the plasma membrane was in favor of the AA gene. In September, we did not notice changes in the quality of the semen among the three genotypes.                          

Keywords: GDF9, testicular dimensions, semen quality.

Full paper in Arabic: pdf