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Most breeding programs are aimed at obtaining economic profi t via creating a maximally possible competitive product. In case of poultry breeding, it means breeding to increase the level of egg-laying capacity (number of eggs), quality of eggs (compliance with the standard for brooding and edible eggs) and quality of meat traits. Therefore, the aims of selection work in poultry breeding are defi ned by the tasks, specifi ed according to the type of productivity trend for poultry – egg-laying, meat, or dual-purpose. Over the last decades, modern DNA-technologies have been actively introduced into poultry selection, which gave rise to marker-assisted (MAS) and genome selection (Wolc et al., 2016). The combination of modern DNA-technologies and classic selection approaches paved the way for the creation of highly productive competitive lines and breeds of poultry (Simrinder et al., 2013). Unfortunately, in this respect the UkrainiISSN: 2312–3370, Agricultural Science and Practice, 2020, Vol. 7, No. 2

Functional genes polymorphism associations with egg quality traits in the populations of dual-purpose