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Effect of Bull Performance on Progeny Early Growth and Genetic Relationships Between Bull and Progeny Traits

S Aktar
Department of Animal Breeding and Genetics, Bangladesh Agricultural University, Mymensingh 2202, Bangladesh.

AKFH Bhuiyan
Department of Animal Breeding and Genetics, Bangladesh Agricultural University, Mymensingh 2202, Bangladesh.

NG Saha
Department of General Animal Science and Nutrition, Patuakhali Science and Technology University, Patuakhali, Bangladesh.

MA Hoque
Department of Animal Breeding and Genetics, Bangladesh Agricultural University, Mymensingh 2202, Bangladesh.

Abstract/ Executive Summary:

Records on four bulls and 96 of their progeny born from 2005 to 2011 with pedigree information were used to estimate the impact of bull performance on progeny early growth and the genetic relationships between traits of bull and their progeny. Traits included in this study were metabolic body weight, feed intake and residual feed intake (RFI) for bull performance and birth weight and average daily gain for progeny performance. The variance and covariance components were estimated by the REML method with the VCE computer program. The metabolic body weight of breeding bulls ranged from 92.88±1.22 to 106.05±2.28 kg. The average daily feed intake of breeding bulls differed significantly (p<0.05). The RFI of breeding bulls were ranged from -0.57±0.07 to 0.54±0.06 kg/day. It has been found that the RFI values of two bulls were negative and the other two bulls were positive. The mean values for birth weight of calves produced from different breeding bulls ranged from 16.15±2.01 to 17.71±1.89 kg. Effects of breeding bulls on birth weight and average daily gain of male calves were highly significant (p<0.01). Mean values for birth weight and average daily gain of female calves were affected also significantly (p<0.05) among breeding bulls. Estimated heritability for birth weight was moderate (0.30) and for average daily gain was low (0.26). The genetic correlation between metabolic body weight of bulls and birth weight of their progeny was strong (r Department of General Animal Science and Nutrition, Patuakhali Science and Technology University, Patuakhali, Bangladesh g=0.52), whereas feed intake of bulls with birth weight and average daily gain of their progeny were moderate (0.43±0.21 and 0.40±0.23, respectively). Low but favorable negative genetic correlation (rg=-0.10) was observed between RFI of bulls with average daily gain of their progeny. Estimated moderate heritability indicated that variation exist on average daily gain of calves. The negative genetic correlation between RFI of bulls and average daily gain of their progeny indicated that it was possible to improve simultaneously RFI of breeding bulls and daily gain of their progeny.

Keywords: Residual feed intake, Heritability, Genetic correlation, Progeny

Location: Artificial insemination (AI) center and the dairy farm of BAU, Mymensingh

Start Date: 00-01-2010

End Date: 00-12-2010

Program Area: Variety and Species

Commodity: Bull

Objectives:

To estimate the effect of performance of breeding bull on progeny early growth and genetic relationship between bull and progeny traits in our country.

Methodology:

The experiment was conducted at the artificial insemination (AI) center and the dairy farm of Bangladesh Agricultural University (BAU), Mymensingh. Four breeding bulls at the artificial insemination centre and on 96 of their progeny at the BAU dairy farm produced from those breeding bulls constituted the experimental animals. Breeding bulls were one Sindhi cross (ID 122), two Friesian crosses (ID 131 and 2858) and one Sahiwal cross (ID 143). Bull (feed intake and body weight) data and progeny (weight at birth and at 3-month of age) data were collected during the period from January to December, 2010. However, calves produced from the studied breeding bulls during the period from 2005 to 2009 were also The bulls were stall-fed. They were provided 50% green grass and 50% straw on the basis of weight plus 1 kg concentrate feed per day. The concentrate feeds were supplied twice daily in the morning and evening. A mixture of mustard oil cake, wheat bran and common salt was used as concentrate feed. Water also provided ad libitum. Monthly body weights of breeding bulls were recorded using the portable weighing balance. Sheds were cleaned and washed with water in the morning and in the afternoon sheds was cleaned and washed again before feeding. Animals were bathed once in a day. Bulls were kept out of the sheds for free moving and light exercise for about two hours daily in the morning. Vaccination and medication were performed regularly. Calf management The calves were reared in calf pen at the calves’ shed of BAU dairy farm. They were provided green grass and water ad libitum. The concentrate feeds were also supplied to them twice daily in the morning and evening. Regular vaccination and medication were performed. In general, ear tag was used for identification of calves, however, in some cases neck band were used for new born calves. Bull Performance Data Bull performance traits were average daily feed intake, metabolic body weight and RFI. Daily feed intake was measured by the difference between supplied and leftover feed. Metabolic body weight was calculated as MBW, raised to the power of 0.75 (MBW0.75). The RFI was estimated as the difference between actual feed intake and that predicted from single trait analysis for daily feed intake with metabolic body weight using statistical analysis system (SAS, 1998) software as described by Hoque and Oikawa (2004). RFI was calculated as: RFI = FI - MWT× βw – Intercept where, RFI = residual feed intake, FI = daily feed intake, MBW = metabolic body weight, βw The birth weight and 3-month weight records on 53 male and 43 female calves (total 96) were recorded. The average daily weight gain of , regression coefficients of animal's FI on MBW.from the herd book maintained at the dairy farm to increase the number the records in the analysis.

Source of Information: Bang. J. Anim. Sci. 2011. 40 (1-2): 1-7

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

It can be concluded that metabolic body weight and residual feed intake of crossbred breeding bull has significant impact on progeny early growth performance. In addition, residual feed intake of bulls is independent (zero correlation) of birth weight and weak but negative correlation with average daily gain of their progeny. It indicates that it is possible to decrease residual feed intake of bulls with no adverse effect on progeny early growth performance to improve whole herd production efficiency.

Knowledge Management: Journal