Merinos in Poland – an analysis of breeding condition, selected performance traits and perspectives for the protection of genetic resources in relation to the country’s total sheep population

The purpose of the study was to analyse the breeding condition and performance traits of merino sheep belonging to three breeds in 2008-2022. The experimental material consisted of data derived from annual reports published by the Polish Sheep Breeding Association on breeding of three merino breeds: Polish Merino, Coloured Merino, old-type Polish Merino and data on the number and distribution of flocks, as well as data on the implementation of the sheep genetic resources protection programme from the database of the National Research Institute of Animal Production covering the period of the last 15 years. Analysing the population size over the last 15 years, significant changes were observed in the breed structure of the Merino sheep population. The implementation of conservation programmes and the opportunity to obtain subsidies for conservation breeds have had an impact on the breeding of these breeds in our country. Currently, the largest share of the merino sheep population is represented by the old-type Polish merino. Merino breeding has a regional and large-scale profile, concentrated in the historical areas of their maintenance, in Wielkopolska and Kujawy, usually in flocks of about 100 dams. Reproduction rates expressed by maternal prolificacy were found to be in line with the breed pattern. The Polish merino and the old-type Polish merino were distinguished by similar parameters of reproductive traits and higher fertility as well as rearing indices than those of the coloured merino. The coloured merino is the breed with the highest fertility and breeding performance. Body weight of lambs was higher for the white varieties. However, reproductive and meat performance indices show the potential of merino sheep in the context of lamb production, which is currently the main focus of sheep production in Poland.