Heritability estimates of some productive traits in Sahiwal cattle
Javed, K. (Research Inst. for Physiology of Animal Reproduction, Kasur (Pakistan)) | Mohiuddin, G. | Akhtar, P.
Data on 8948 performance records of Sahiwal cows kept at the Livestock Experiment Station, Jahangirabad (Khanewal) were used in the present investigation. The heritability was estimated by using Restricted Maximum Likelihood (REML) procedure fitting an Individual Animal Model. The heritability estimates by univariate analysis were 0.013 plus-minus 0.022 for first lactation milk yield, 0.062 plus-minus 0.039 for first lactation length and 0.028 plus-minus 0.027 for first dry period. The heritability estimates considering all lactations (repeatability model) were 0.052 plus-minus 0.032, 0.027 plus-minus 0.013 and 0.029 plus-minus 0.018 for milk yield, lactation length and dry period, respectively. Pedigree and performance recording of dairy animals for more precise genetic evaluation programmes is suggested.
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Эту запись предоставил National Agricultural Research Centre