摘要
Longevity and stay ability are parameters in any breeding programme. </span><span style="font-family:Verdana;">The </span><span style="font-family:Verdana;">Overstaying of any animal </span><span style="font-family:Verdana;">o</span><span style="font-family:Verdana;">n a farm has got negative effects </span><span style="font-family:Verdana;">on</span><span style="font-family:Verdana;"> the farmer. Short stay also means early exit of good animal</span><span style="font-family:Verdana;">s</span><span style="font-family:Verdana;"> that could have been used for a longer time and more productive. The intention of this review paper is to emphasize the importance of models that an upcoming breeding program can use without affecting the quality of the herd. In this paper</span><span style="font-family:Verdana;">,</span><span style="font-family:Verdana;"> longevity is taken purely on </span><span style="font-family:Verdana;">the </span><span style="font-family:""><span style="font-family:Verdana;">performance measure. The functional and type traits of longevity should be studied further before all models are put into play. But the case of closed breeding programmes, performance traits are easily measurable because many animals will exit the herd as they have been sold to farmers hence many functional straits will be expressed outside the herd. Genetic evaluation of the Kenyan Sahiwal should account for inbreeding. This study has also </span><span style="font-family:Verdana;">provided genetic and phenotypic parameters to enable </span></span><span style="font-family:Verdana;">the </span><span style="font-family:Verdana;">inclusion of longevity in the breeding objective for the Sahiwal cattle improvement pro</span><span style="font-family:Verdana;">gramme.
Longevity and stay ability are parameters in any breeding programme. </span><span style="font-family:Verdana;">The </span><span style="font-family:Verdana;">Overstaying of any animal </span><span style="font-family:Verdana;">o</span><span style="font-family:Verdana;">n a farm has got negative effects </span><span style="font-family:Verdana;">on</span><span style="font-family:Verdana;"> the farmer. Short stay also means early exit of good animal</span><span style="font-family:Verdana;">s</span><span style="font-family:Verdana;"> that could have been used for a longer time and more productive. The intention of this review paper is to emphasize the importance of models that an upcoming breeding program can use without affecting the quality of the herd. In this paper</span><span style="font-family:Verdana;">,</span><span style="font-family:Verdana;"> longevity is taken purely on </span><span style="font-family:Verdana;">the </span><span style="font-family:""><span style="font-family:Verdana;">performance measure. The functional and type traits of longevity should be studied further before all models are put into play. But the case of closed breeding programmes, performance traits are easily measurable because many animals will exit the herd as they have been sold to farmers hence many functional straits will be expressed outside the herd. Genetic evaluation of the Kenyan Sahiwal should account for inbreeding. This study has also </span><span style="font-family:Verdana;">provided genetic and phenotypic parameters to enable </span></span><span style="font-family:Verdana;">the </span><span style="font-family:Verdana;">inclusion of longevity in the breeding objective for the Sahiwal cattle improvement pro</span><span style="font-family:Verdana;">gramme.
作者
Benjamin Musyimi Musingi
Leah Mumbi Mahianyu
E. Dorcas Mutheu Musingi
Benjamin Musyimi Musingi;Leah Mumbi Mahianyu;E. Dorcas Mutheu Musingi(Animal Breeding and Genomics Group, Department of Animal Sciences, Egerton University, Egerton, Kenya;Department of Biological Sciences, Egerton University, Egerton, Kenya;National Police Service, Department of Kenya Police, Njoro, Kenya;Department of Building and Civil Engineering Water Section, Technical University of Mombasa, Mombasa, Kenya)
