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Title: | Genetic and phenotypic parameters and annual trends for growth and fertility traits of Charolais and Hereford beef cattle breeds in Kenya |
Authors: | J. S. K. Orenge; E. D. Ilatsia; I. S. Kosgey; A. K. Kahi |
Keywords: | Annual trends Charolais Genetic parameters Hereford |
Issue Date: | 31-Oct-2008 |
Publisher: | Springer |
Abstract: | This study estimated genetic and phenotypic parameters and annual trends for growth and fertility traits of Charolais and Hereford cattle in Kenya. Traits considered were birth weight (BW, kg), pre-weaning average daily gain (ADG, kg/day) and weaning weight (WW, kg); calving interval (CI, days) and age at first calving (AFC, days). Direct heritability estimates for growth traits were 0.36 and 0.21; 0.25 and 0.10; 0.23 and 0.13 for BW, ADG and WW in Charolais and Hereford, respectively. Maternal heritability estimates were 0.11 and 0.01; 0.18 and 0.00; 0.17 and 0.17 for BW, ADG and WW in Charolais and Hereford, respectively. Direct-maternal genetic correlations ranged between −0.46 and 1.00; −0.51 and −1.00; −0.47 and −0.39 for BW, ADG and WW in Charolais and Hereford, respectively. Genetic correlations ranged from −0.99 to unity and −1.00 to unity for growth and fertility traits respectively. Prospects for improvement of growth and fertility traits exist. |
URI: | https://doi.org/10.1007/s11250-008-9250-2 http://ir.mu.ac.ke:8080/xmlui/handle/123456789/2601 |
Appears in Collections: | School of Agriculture and Natural Resources |
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