ESTIMATED BREEDING VALUES AND GENETIC TREND FOR 305 DAY MILK YIELD IN BUFFALO HERD AT LES CHAK KATORA

M. Ahmad, A. Parveen, A..A .Farooq, A.Gaffar* and M. M. Aziz

Buffalo Research Institute, Pattoki District Kasur, Pakistan *Livestock and Dairy Development Board, Islamabad, Pakistan

ABSTRACT

Data on 1524 pedigrees, breeding and performance records of 447 Nili-Ravi Buffaloes maintained at 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 on going progeny testing program in the country. The lactation records up to 9th parity were used for the analysis. The data were analyzed through Best Linear Unbiased Predication (BLUP) procedure. The breeding values were estimated by using Derivative Free Restricted Maximum Likelihood (DFREML) Procedure fitting individual animal model. The least squares means for 305 day lactation milk yield was 2030.13 ±14.58 Kg. The average lactation length was 260.42±1.35 days.  Out of 447 buffaloes, 284 had positive breeding values (EBVs), 90 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. Key words: Animal model, Estimated breeding values, 305 day milk yield, buffaloes.    

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ESTIMATED BREEDING VALUES AND GENETIC TREND FOR 305 DAY LACTATION MILK YIELD IN BUFFALO HERD AT LES HAROONABAD

M. Ahmad, A. Parveen, A.A.Farooq, A.Gaffar* and M. M. Aziz

Buffalo Research Institute, Pattoki District Kasur, Pakistan *Livestock and Dairy Development Board, Islamabad, Pakistan

ABSTRACT  

Data on 606 pedigrees, breeding and performance records of 221 Nili-Ravi Buffaloes maintained at Livestock Experiment Station, Haroonabad, (Bahawalnagar), Punjab, Pakistan during the period 1988 to 2007 were utilized in this study to identify the high yielding elite buffaloes/bull mothers (dams) to retain for further breeding for the on going progeny testing program in the country. The lactation records up to 9th parity were used for the analysis. The data were analyzed through Best Linear Unbiased Predication (BLUP) procedure. The breeding values were estimated by using Derivative Free Restricted Maximum Likelihood (DFREML) Procedure fitting individual animal model. The least squares means for lactation milk yield was 1900.47 ±21.85 Kg. The average lactation length was 250.36±2.35 days.  Out of 221 buffaloes, 125 had positive breeding values (EBVs+), 44 declared as elite buffaloes. The estimated breeding values for 305 day lactation milk yield from animal model evaluations ranged from –90.10 to +71.22 Kg. The over all genetic trend for milk yield although found positive but genetic improvement was close to zero.

Key words: Animal model, Estimated breeding values, milk yield, buffaloes.    

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EVALUATION AND GENETIC TREND FOR 305 DAY MILK YIELD IN BUFFALO HERD AT LES BHUNIKEY 

M. Ahmad, A. Parveen, A.A.Farooq, and M. M. Aziz

Buffalo Research Institute, Pattoki District Kasur, Pakistan

ABSTRACT 

Data on 256 performance records of 250 Nili-Ravi Buffaloes maintained at Livestock Experiment Station, Bhunikey, under Buffalo Research Institute, (BRI) Pattoki District Kasur, Punjab, Pakistan during the period 2005 to 2007 were utilized in this study to identify the high yielding elite buffaloes/bull mothers (dams) to retain for further breeding for the on going progeny testing program in the country. The pedigree information of all the animals was missing because these animals were purchased for a development scheme from the field area. Their breeding values could not be estimated. However, their GLS solutions were obtained for ranking of these animals according to their genetic merit. Data were analyzed to estimate the GLS solutions for 305 day lactation milk yield. The GLS solutions were estimated by using Derivative Free Restricted Maximum Likelihood (DFREML) Procedure fitting individual animal model. The least squares means for 305 day lactation milk yield was 2035.06±27.82Kg. The average lactation length was 268.17±3.43days. Out of 250 buffaloes, 132 had positive GLS solutions, 50 declared as elite buffaloes. The GLS solutions for milk yield from animal model evaluations ranged from –11.00 to +18.01 Kg. The over all genetic trend for 305 day lactation milk yield depicted a deteriorating trend indicating that breeding strategy proved to be inefficient in the past.

Key words: Animal model, test day milk yield, 305 day milk yield, Nili Ravi buffaloes.    

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EVALUATION AND GENETIC TREND FOR BUFFALO POPULATION USING TEST DAY MILK YIELD IN PTP AREA DISTRICT GUJRANWALA

M. Ahmad, M. S. Azhar, A.A.Farooq, A. Perveen, M. Ishaq and M. M. Aziz

Buffalo Research Institute, Pattoki District Kasur, Pakistan

ABSTRACT

Data on performance records of 1132 Nili-Ravi buffaloes for the parity 1 to 6 in the PTP area district Gujranwala, under Buffalo Research Institute, (BRI) Pattoki District Kasur, Punjab, Pakistan during the period 2005 to 2007 were utilized in this study to identify the high yielding elite buffaloes/bull mothers (dams) to retain for further breeding for the on going progeny testing program in the country. The pedigree information of all the animals was missing because these animals belong to the field area. Their breeding values could not be estimated. However, their GLS solutions were obtained for ranking of these animals according to their genetic merit. The data were analysed by test day model using Statistical Analysis System (SAS), 1998 for fixed effects. The GLS solutions were estimated by using Derivative Free Restricted Maximum Likelihood (DFREML) Procedure fitting individual animal model. The least squares means for 305 day lactation milk yield was1152.35±18.17 Kg. The average lactation length was 161.91±1.62 days. The number of test days ranged from 2 to 10. The GLS solutions values varied from -14.56 to 27.08 kg. Out of 1132 buffaloes, 227 were declared as bull dams (elite) while 227 buffaloes were declared as poor yielders. The over all genetic trend for 305 day lactation milk yield depicted a deteriorating trend indicating that breeding strategy proved to be inefficient in the past.

Key words: Animal model, test day milk yield, 305 day milk yield, Nili Ravi buffaloes.    

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EVALUATION AND GENETIC TREND FOR BUFFALO POPULATION USING TEST DAY MILK YIELD IN PTP AREA DISTRICT, FAISALABAD

M. Ahmad, A. A. Farooq, A. Parveen,  S. Amjad and M. M. Aziz

Buffalo Research Institute, Pattoki District Kasur, Pakistan  

ABSTRACT

Data on performance records of 1012 Nili-Ravi buffaloes for the parity 1 to 6 in the PTP area district Faisalabad, under Buffalo Research Institute, (BRI) Pattoki District Kasur, Punjab, Pakistan during the period 2006 to 2008 were utilized in this study to identify the high yielding elite buffaloes/bull mothers (dams) to retain for further breeding for the on going progeny testing program in the country. The pedigree information of all the animals was missing because these animals belong to the field area. Their breeding values could not be estimated. However, their GLS solutions were obtained for ranking of these animals according to their genetic merit. The data were analyzed by test day model using Statistical Analysis System (SAS), 1998 for fixed effects. The GLS solutions were estimated by using Derivative Free Restricted Maximum Likelihood (DFREML) Procedure fitting individual animal model. The least squares means for 305 day lactation milk yield was 2106.21±27.98 Kg. The average lactation length was 212.42±2.13 days. The number of test days ranged from 2 to 10. The GLS solutions values varied from -21.74 to 44.72 kg. Out of 1012 buffaloes, 202 were declared as bull dams (elite) while 202 buffaloes were declared as poor yielders. The over all genetic trend for milk yield was found positive.

Key words: Animal model, test day milk yield, 305 day milk yield, Nili Ravi buffaloes.    

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EVALUATION AND GENETIC TREND FOR BUFFALO POPULATION USING TEST DAY MILK YIELD IN PTP AREA DISTRICT TOBA TEK SINGH

M. Ahmad, A. Parveen, A. Hyee, A. A. Farooq and M. M. Aziz

Buffalo Research Institute, Pattoki District Kasur, Pakistan  

ABSTRACT

Data on performance records of 755 Nili-Ravi buffaloes for the parity 1 to 6 in the PTP area district Toba Tek Singh (T. T. Singh), under Buffalo Research Institute, (BRI) Pattoki District Kasur, Punjab, Pakistan during the period 2006 to 2008 were utilized in this study to identify the high yielding elite buffaloes/bull mothers (dams) to retain for further breeding for the on going progeny testing program in the country. The pedigree information of all the animals was missing because these animals belong to the field area. Their breeding values could not be estimated. However, their GLS solutions were obtained for ranking of these animals according to their genetic merit. The data were analyzed by test day model using Statistical Analysis System (SAS), 1998 for fixed effects. The GLS solutions were estimated by using Derivative Free Restricted Maximum Likelihood (DFREML) Procedure fitting individual animal model. The least squares means for 305 day lactation milk yield was 1485.51±20.56 Kg. The average lactation length was 196.39±2.08 days. The number of test days ranged from 2 to 10. The GLS solutions values varied from -16.17 to +15.42 kg. Out of 755 buffaloes, 151 were declared as bull dams (elite) while 151 buffaloes were declared as poor yielders. The over all genetic trend for milk yield was found positive.

Key words: Animal model, test day milk yield, 305 day milk yield, Nili Ravi buffaloes.