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Genetic analysis of growth curve of Afshari lambs by legendrepolynomials-based random regression models |
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| รหัสดีโอไอ | |
| Creator | 1. Farhad Ghafouri-Kesbi 2. Moradpasha Eskandarinasab |
| Title | Genetic analysis of growth curve of Afshari lambs by legendrepolynomials-based random regression models |
| Publisher | Research and Development Office, Prince of Songkla University |
| Publication Year | 2564 |
| Journal Title | Songklanakarin Journal of Science and Technology (SJST) |
| Journal Vol. | 43 |
| Journal No. | 1 |
| Page no. | 188-194 |
| Keyword | sheep, body weight, heritability, genetic correlation |
| URL Website | https://rdo.psu.ac.th/sjstweb/index.php |
| ISSN | 0125-3395 |
| Abstract | The aim of this study was to apply Simple Repeatability Model (SRM) and Random Regression Models (RRMs) todescribe growth curve of Afshari lambs. Results revealed the inadequacy of SRM to model variation in growth curve of Afsharilambs. A RRM with orders 3, 2, 3, and 2 for direct genetic, direct permanent environment, maternal genetic and maternalpermanent environmental effects was selected as the parsimonious model. Direct heritability (h2) and maternal permanentenvironmental effect (c2) were maximal at 98 days of age, and decreased with age until the end of growth trajectory. Directpermanent environmental effect (p2) and maternal heritability (m2) were minimal at 98 days of age, but increased thereafter to apeak at 525 days of age. In conclusion, results revealed substantial genetic potential for selection responses in early growth ofAfshari lambs and that this genetic potential can be exploited by breeders to improve growth performance of Afshari lambs. |
