Simulácia vplyvu náhodného pripárovania a selekcie podľa odhadnutých BLUP plemenných hodnôt na výšku prírastku inbrídingu v populáciách pinzgauského plemena na Slovensku

Kasarda, R., Slovenská poľnohospodárska univ. v Nitre , Fakulta agrobiológie a potravinových zdrojov, Katedra genetiky a plemenárskej biológie; Kadlečík, O.

Stochastic simulation of random mating and selection on BLUP breeding values on increase of inbreeding in population of the Slovak Pinzgau breed | Simulácia vplyvu náhodného pripárovania a selekcie podľa odhadnutých BLUP plemenných hodnôt na výšku prírastku inbrídingu v populáciách pinzgauského plemena na Slovensku

2010

Kasarda, R., Slovenská poľnohospodárska univ. v Nitre (Slovak Republic), Fakulta agrobiológie a potravinových zdrojov, Katedra genetiky a plemenárskej biológie | Kadlečík, O.

The research evaluated direct effect of population structure in breeding programme and influence of selection intensity on increase of inbreeding per generation. The impact of strategy change and intensity of selection, or the change of mating strategy with the aim to minimize increase of inbreeding was analyzed by the Monte Carlo stochastic simulation, according to the existing population structure. Comparison was made under random mating and phenotypic selection, or selection on BLUP breeding values. The BLUP selection resulted into higher increase of inbreeding in all designed alternatives. The increase of inbreeding was significantly higher in the alternative with 4 (dif=1.2696+, or. 5 (dif=0.8665+) sires of the selected sires. With use of 2 or 3 sires the differences were not significant. The intrapopulation diversity is an important part of global biodiversity, not only in case of wild-living but also farm animals. A critical value for the measurement of genetic diversity loss in population is the rate of inbreeding. For saving genetic diversity and prevention of population loss it is important to minimize the increase of inbreeding in small populations as endangered breeds. The classical approach was based on balancing ratio of sires and dams in the mating programme. Contrariwise, in most of the commercial populations small number of sires is used with high mating ratio. Keeping high number of sires is also problematic. According to the long-term genetic contribution theory, it is possible to model muttigenerational development of pedigrees. This approach was validated by stochastic simulation. Future research wili be oriented on the simulation of the development under the BLUP selection with determined mating.

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