Genetic Correlation Between Growth Hormone SNPs and Selection Parameters in Japanese Quail: Multi-Generation Study | ||||
| Egyptian Journal of Veterinary Sciences | ||||
| Articles in Press, Corrected Proof, Available Online from 03 December 2024 PDF (1.05 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejvs.2024.326428.2408 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
haitham ahmed yacoub   1; Hassan Darwish2; Sabah F Youssef3; sherif Abd-Elmaksoud4
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| 1El behoos street El dokki | ||||
| 233 El Bohouth St., Dokki, Cairo, P.O. 12622, Egypt | ||||
| 32Poultry Breeding Department, Animal Production Research institute, Agriculture and land Research Center, Dokki, Egypt nadi elsaed street | ||||
| 4Environmental Virology Laboratory, Water Pollution Research Department, National Research Centre, 33 El Buhouth St, Giza 12622, Egypt | ||||
| Abstract | ||||
| This study was to evaluate selective breeding on body weight over three generations in Japanese quail and to understand the association between three GH gene SNPs and growth. The analysis included the average body weight at 2, 4, and 6 weeks of age which showed an increasing direction from the basic population to generation three (G3). The most significant growth observed was at 2-weeks where there was a 35.8% increase by G3 signifying good early growth selection. The results also evaluated selection response, selection differential as well as realized heritability for 4-week bodyweight thus demonstrating strong genetic response during first generation (G1 by 35.8% increase) but reduced responses in subsequent generations. Genotypic analysis was done using SNPs located within growth hormone gene showing frequency shifts among different alleles. Different SNP genotypes consistently correlated higher than usual weights thus giving pointers towards future breeding strategies; additionally additive effects varied across generations which implies need for specific approaches aimed at manipulating genes responsible for controlling weight gain within particular periods during ontogeny while taking care not to interfere with other important biological processes occurring simultaneously. The study therefore showed that (BV) breeding values for 4-week body weight increased significantly between G1 and G3 but subsequent increases became smaller indicating possible genetic limits being reached. In conclusion, this study was significant for Japanese quail industry because it will help farmers optimize their breeding plans towards attaining desired weights using selective breeding methods during early maturity periods too. | ||||
| Keywords | ||||
| Japanese quail; short-term selection; growth hormone; SNP; EBV | ||||
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