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A. Gunawan
Faculty of Animal Science, Bogor Agricultural University, Jl. Agatis, Darmaga Campus, Bogor 16680
Agriculture, Biological Sciences & Forestry Earth & Planetary Sciences

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GENETIC ANALYSIS OF REPRODUCTIVE TRAITS IN BALI CATTLE MAINTAINED ON RANGE UNDER ARTIFICIALLY AND NATURALLY BRED A. Gunawan; R. Sari; Y. Parwoto
Journal of the Indonesian Tropical Animal Agriculture Vol 36, No 3 (2011): (September)
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jitaa.36.3.152-158

Abstract

The aim of this study was to evaluate genetic analysis including heritability and further phenotypicand genetic trends of reproductive traits in Bali cattle. Reproductive traits studied were age at firstcalving (AFC), calving interval (CI) and pregnancy rate (PR). Data of reproductive traits were collectedfrom Breeding Centre of Bali Cattle, Denpasar-Bali at the year period of 2000-2007. To evaluate thegenetic analysis, heritability were estimated using the Mixed Model Least Squares and MaximumLikelihood procedure. The phenotypic and genetic trends were calculated using regression equation.Estimation of heritability for AFC, CI and PR were 0.22, 0.41 and 0.40, respectively. The phenotypictrend of AFC, CI and PR decreased at an average rate of 1.70 month, 10.4 days and 0.75% per year,respectively. The same pattern was showed for genetic trends for AFC, CI and PR decreased at 0.38month, 4.25 days and 0.30% per year respectively in the same period. The heritability of reproductiontraits in Bali cattle were considered as moderate to high (0.22-0.41) which means that the selectionprogram will be more effective and efficient in improving the genetic merits in Bali cattle.
NON GENETIC FACTORS EFFECT ON REPRODUCTIVE PERFORMANCE AND PREWEANING MORTALITY FROM ARTIFICIALLY AND NATURALLY BRED IN BALI CATTLE A. Gunawan; R. Sari; Y. Parwoto; M.J. Uddin
Journal of the Indonesian Tropical Animal Agriculture Vol 36, No 2 (2011): (June)
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jitaa.36.2.83-90

Abstract

The aim of this study was to evaluate effect of non genetic factors on reproductive performance ofBali cattle. Data on reproduction performance were collected from Breeding Centre of Bali Cattle inDenpasar-Bali. Reproductive traits studied were age at first calving (AFC), calving interval (CI) andpregnancy rate (PR). To observe the effect of non genetic factors on the reproductive traits, a mixedmodel was used because all of the traits studied were measured repeatedly in individuals. The overallmeans for AFC, CI, PR and preweaning mortality were 43.86±0.70 months, 360.93±4.47 days,88.44±1.91% and 7.58±1.07%, respectively. The results showed that AFC and PR were significantly(P<0.01) influenced by dam year of birth but mating system had no significant (P>0.05) effect. Withregard to CI, dam year of birth and parity affected CI while mating system had no significantly affect(P>0.05) on CI. The preweaning mortality was only affected by the age of dam significantly (P<0.01).The average of reproductive performance and preweaning mortality in Bali Cattle were not dependedremarkably on the mating system being practiced. It might be concluded that an improvement in Balicattle reproductive traits is possible through improving management systems and utilisation ofcontrolled breeding techniques.
Co-Authors M.J. Uddin R. Sari R. Sari Y. Parwoto Y. Parwoto