| publication name | Genetic evaluation of growth traits in a crossbreeding experiment involving two local strains of chickens using multi-trait animal model - 2002 |
|---|---|
| Authors | Iraqi M.M., Hanafi M.S., Khalil, M.H., El-Labban, A.F.M., and El-Sisy M. |
| year | 2002 |
| keywords | Egyptian chickens, heterosis, direct and maternal additive effects, breeding values. |
| journal | Livestock Research for Rural Development, Latin America. |
| volume | 14 |
| issue | 5 |
| pages | 69-79 |
| publisher | Fundación CIPAV, Cali, Colombia, Centro para la Investigación en Sistemas Sostenibles de Producción Agropecuaria, Cali, Colombia |
| Local/International | International |
| Paper Link | http://www.cipav.org.co/Irrd14/5/ iraq145tmp.htm |
| Full paper | download |
| Supplementary materials | Not Available |
Abstract
A crossbreeding experiment was carried out between two local strains of Mandarah (MN) and Matrouh (MA) chicken. Thirty-four sires and 400 dams from each strain were used to produce four genetic groups. Body weights of 3067 chicks at hatch (BW0), 4 (BW4), 8 (BW8), 12 (BW12) and 16 (BW16) weeks of age and their daily gains in weight during the age intervals from 0-4 (DG4), 4-8 (DG8), 8-12 (DG12) and 12-16 (DG16) weeks were evaluated. Multi-trait animal model (MTAM) was used to estimate direct additive genetic (GI) and maternal additive genetic (GM) and direct heterosis (HI) effects. Heritabilities were estimated and breeding values (PBV) were also predicted. Estimates of Heritabilities (h2) for growth traits ranged from 0.14 to 0.58. The percentages of GM were in favour of the MA dams and ranged from –1.47 to –6.70 % for body weights and from –1.40 to –7.73 % for gains in weight. Estimates of HI (P