Estimated breeding values and genetic trend for 305-day milk yield in buffalo herd at les Chak Katora
2008
Ahmad, M. (Buffalo Research Inst., Kasur (Pakistan)) | Parveen, A. (Livestock and Dairy Development Board, Islamabad (Pakistan)) | Gaffar, A. (Livestock and Dairy Development Board, Islamabad (Pakistan)) | Aziz, M.M. (Buffalo Research Inst., Kasur (Pakistan))
Data on 1524 pedigrees, breeding and performance records of 447 Nili-Ravi buffaloes maintained at the Livestock Experiment Station, Chak Katora, (Bahawalpur), Punjab, Pakistan during the period 1989 to 2007 were utilized in this study to identify the high yielding elite buffaloes/bull mothers (dams) to retain for further breeding for the ongoing progeny testing program in Punjab. The lactation records up to 9th parity were used for the analysis. The data were analyzed through Best Linear Unbiased Prediction (BLUP) procedure. The breeding values were estimated by fitting an individual animal model. The least squares means for 305-day lactation milk yield was 2030.13 plus minus 14.58 litre. The average lactation length was 260.42 plus minus 1.35 days. Of 447 buffaloes, 284 had positive breeding values (EBVs) and 90 were declared as elite buffaloes. The estimated breeding values for milk yield from animal model evaluations ranged from -323.40 to +345.12 kg. The genetic trend for 305-day lactation milk yield depicted a deteriorating trend indicating that breeding strategy proved to be inefficient during the last 20 years.
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