Biotechnology in Animal Husbandry - Institut za Stočarstvo

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Biotechnology in Animal Husbandry 27 (2), p 127-135 , 2011 ISSN 1450-9156 Publisher: Institute for Animal Husbandry, Belgrade-Zemun UDC 636.081:636.2 DOI:10.2298/BAH1102127P THE EVALUATION OF BREEDING VALUE OF SIMMENTAL BULLS FOR MILK PERFORMANCE IN SERBIA V. Pantelić 1 , M. Plavšić 2 , S. Trivunović 2 , S. Aleksić 1 , Lj. Sretenović 1 , D. Ostojić-Andrić 1 , D. Nikšić 1 1 Institute for Animal Husbandry, Belgrade-Zemun, 11080 Zemun, Republic of Serbia 2 Faculty of Agriculture, Novi Sad, Republic of Serbia Corresponding author: Vlada Pantelić, e-mail: vladap4@gmail.com Original scientific paper Abstract: The basis for selection work is knowledge of the quality of bull sires used for conception, as well as how the major traits are passed on to the progeny. BLUP method (Best Linear Unbiased Prediction) is the basis of the most favourable solution for evaluation of additive gene value in cattle production, and it is implemented in various variants depending on the structure of data used. This research included 2.121 Simmental first cavers under control, with lactations completed within one year. All first calvers were located on holdings of individual agricultural producers on the territory of the Republic of Serbia. Evaluation of the bull breeding value for lactation duration, milk production, milk fat yield, yield of 4% FCM and percentage of milk fat, was carried out by using the mixed model (BLUP), the calculation included random effect of bull sire and fixed effect of the region, year and season of calving. In this study, bull sires which had in two or three regions over 20 daughters – first calvers of Simmental breed. Number of first calving heifers ranged from 22 to 215 animals per bull sire. By using BLUP method in evaluation of breeding value of bulls in terms of yield of milk, milk fat, content of milk fat and 4% FCMI and by ranking, results were obtained showing superiority and inferiority of breeding males. Key words: Simmental breed, bulls, breeding value, milk performance Introduction Simmental breed of cattle is predominant in Central Serbia, where the total cattle population is approx. 819 000 heads, of which approx. 538.000 are cows and pregnant heifers. Active population of Simmental breed in Republic of Serbia consists of animals recorded in the main livestock/cattle registry (approx. 75.000 animals or 14%). Breeding goal for Simmental breed is to achieve maximum genetic potentials in economically relevant traits, in accordance with economical
128 V. Pantelić et al. effects of genetic improvement achieved by this breed in developed world countries. In evaluation of breeding value for milk traits/performance, especially of bulls in progeny testing, in Serbia until recently the CC method – Contemporary comparison was used, as well as selection index, and in last years, the Best Linear Unbiased Prediction is used (BLUP). According to Sullivan and Schaeffer (1994) the Best Linear Unbiased Prediction (BLUP) has become world standard in evaluation of the genetic value. Vidović et al. (1993) evaluated the breeding value of Simmental bulls based on their progeny using both BLUP and CC method. Results obtained by authors indicated that the evaluation of the bulls’ breeding value and their ranks, obtained by BLUP-1 and BLUP-2 methods, were similar to evaluation and rank obtained by CC method. The effect of selection in population depends, among other things, on the accuracy of the evaluation of additive value of the parent genotype, i.e. breeding value of bull sires, as concluded by Đurđević and Vidović (1994). The authors evaluated the breeding value using BLUP and CC methods. Correlation of the breeding value rank showed that there was no complete concordance between these two methods. Miščević (1995) obtained in his research results according which the correlation coefficient of the rank showed that there was significantly high dependence between BLUP and CC methods. However, the method of Best Linear Unbiased Parameters, due to inclusion of fixed effects, gave more precise results and more reliable evaluation of the breeding value of male breeding animals. Stojić (1996) concluded that application of correction factors contributes to the accuracy of the evaluation of the breeding value in the way that more important factors with certain direction of their action are brought to the same level, and also because of increase of repeatability. Evaluation of the genotype additive value, i.e. accuracy of its evaluation (bull breeding value) is directly associated with selection effect/success in cattle population (Petrović et al. 1997). By using mixed model, random effect of bull sire on milk yield, yield of milk fat, content of milk fat and 4% FCM and forming of bull rank based on breeding value, results were obtained showing significant superiority or inferiority if male breeding animals. One of the methods for evaluation of breeding value of cows and bulls is »test-day model«. Advantage of this method is in the correction of the effect of the environment factors on individual cow performance, as stated by Freeman (1998). The »test-day« model is most often used for several traits, primarily milk yield, yield of milk fat, proteins and somatic cell count in milk. »Test-day« model enables genetic evaluation for additional traits, such as persistence, milk yield in specific part of lactation, etc.
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184 D. Vitorović et al. (Vićentij
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186 D. Vitorović et al. Broilers i
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188 D. Vitorović et al. deposition
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190 D. M. Ogah Blasco et al. (1984)
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192 D. M. Ogah Tabe 1. Descriptive
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194 D. M. Ogah chicken genotypes fo
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196 D. M. Ogah HU Y.H. (1999) .Vari
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198 Introduction V. Gerzilov et al.
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200 Results and Discussion V. Gerzi
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202 V. Gerzilov et al. The histolog
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204 V. Gerzilov et al. Table 2. Mic
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Biotechnology in Animal Husbandry 2
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Results and Discussion Analysis of
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Analysis of applied biosecurity mea
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240 N. Thomas et al. kod malabri (1
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244 Y. Aleksiev Table 1. Mean daily
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246 Y. Aleksiev post-shearing, roug
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Materials and Methods Study of bioc
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PETROVIĆ D.M., GUTIĆ M., BOGOSAVL
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