Ducks and drakes for slaughter raised up to the 7th week of age, from two ancestral paternal strains A44 and A55 were evaluated and compared. Birds of both sex from A44 strain weighed 2884 g on average, in the 7th week of rearing, whereas those from A55 strain weighed 2887 g. The feed intake per one duck to 7th week of age from both strains was 9.51 and 9.50 kg accordingly. Economic efficiency indices of the 7-week-old birds of both strains were high and exceeded 500 points. A44 strain birds were characterized by bigger slaughter yield (67.7) in comparison to A55 ducks. Proportion of breast muscles of both strains was similar, however proportion of leg muscles (13.6%) was significantly higher in A55 birds. Drakes of both strains had a bigger weight of abdominal fat and giblets than ducks. The quality of meat, measured with breast and leg muscles pH, was better in A55 ducks in contrast with A44.

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