| publication name | Genetic and phenotypic evaluation for reproduction performance of Egyptian buffaloes - 1991 |
|---|---|
| Authors | Khalil M.H., Mourad K.A., Mohamed M.M., Owen J.B. |
| year | 1991 |
| keywords | Egyptian buffaloes, genetic and phenotypic evaluation, Reproductive traits, heritability, genetic gain |
| journal | Animal Production, Britain; Top ten most cited Journals Ranked by Impact from website (Impact 1981-2006): |
| volume | 52 |
| issue | Not Available |
| pages | 75-82 |
| publisher | British Society of Animal Science |
| Local/International | International |
| Paper Link | http://journals.cambridge.org/action/displayAbstract?aid=7384756 |
| Full paper | download |
| Supplementary materials | Not Available |
Abstract
An analysis of cow reproductive traits was carried out on 2057 lactation records of Egyptian buffaloes. A total of 651 daughters (paternal half-sisters) of 82 sires were available for the analysis. Reproductive traits analysed were age at first, second and third calving (AC), number of services per conception (NSC), gestation length (GL) and calving interval (CI). Year of calving affected most reproductive traits (P < 0.001) while no important differences were detected among months of calving. Means of NSC, GL and CI decreased linearly (P < 0.01) as parity advanced. Age of cow at calving exerted a pronounced effect (P