SELECTION INDICES FOR IMPROVING SOME BEEF CHARACTERISTICS IN FRIESIAN CATTLE IN EGYPT | ||||
| Journal of Animal and Poultry Production | ||||
| Article 4, Volume 33, Issue 12, December 2008, Page 8475-8482 PDF (709.25 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jappmu.2008.218974 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| E. M. Ghoneim,; M. A. El-Saied; F. H. Abdou; E. Faid-Allah | ||||
| Dept. of Animal Production, Fac. of Agric., Minufiya University, Egypt | ||||
| Abstract | ||||
| The main purpose of this paper is to construct different selection indices (general index, reduced indices, and sub-indices) to improve some beef characteristics in Frisian bull calves by using collected data during 10 years (1995-2004) for body weights at 12 (w12), 15 (w15), 18 (w18) months of age and four years (2001-2004) for slaughter weight (SLW) at the experimental farm of Faculty of Agriculture, Minufiya University. The secondary objective is to evaluate and predict genetic parameter estimates of body weights at 12, 15, 18 months of age and SLW. Overall means for the previous body weights were 291.97, 358.74, 418, 17 and 540.35 kg respectively. Heritability estimates for the previous traits were 0.59, 0.74, 0.71 and 0.46, respectively. All estimates of genetic (rG) and phenotypic (rP) correlations among different body weights were positive. Fifteen selection indices were constructed, indices (I2), (I5) and (I9) gave high (RIH) and (RE) values compare with general index (I1). Therefore, it could be suggested that to use (I2), (I5) and (I9) to improve beef traits in Friesian bull calves under the large scale. | ||||
| Keywords | ||||
| Body weight; Genetic parameters; Selection indices | ||||
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