The research was conducted on bees of different intra-line crosses of the Carpathian subspecies in private apiaries in Navariya village, Lviv region. To conduct experimental studies, 6 groups of 10 bee colonies were formed in each group: I – control group – bees of the Carpathian population of the Vuchkovsky type; II – inbred group ♀ microline "915" x ♂ microline "915"; III – breeding cross ♀ microline "Sto" x ♂ microline "915"; IV – breeding cross ♀ type "Vuchkovsky" x ♂ microline "915"; V – breeding cross ♀ microline "67" x ♂ microline "915"; VI – breeding cross ♀ microline "07" x ♂ microline "915".
It was found that bees of different breeding crosses of the Carpathian subspecies differed significantly in flight and pollen collection activity and wax productivity. In terms of flight activity, the bees of the inbred group ♀ microline "915" x ♂ microline "915" significantly differed during observation at 9:00. 12:00 and 15:00 hours. In the morning and at 15:00 hours, the best pollen-collecting activity was characterised by bees of the breeding cross ♀ microline "07" x ♂ microline "915" group. In the afternoon, the bees of the inbred group ♀ microline "915" x ♂ microline "915" collected the most pollen – 312.9, which is 84.1 pieces more than in the control group. In the evening, the best flight activity (392.2 arrivals) and collection of pollen (126.8 pcs.) were observed in insects of the breeding cross ♀ microline "67" x ♂ microline "915". The highest wax yield was characterised by bees of the breeding crosses ♀ microline "07" x ♂ microline "915" and ♀ microline "915" x ♂ microline "915". The strength of the influence of genealogical formation on the flight activity of bees during the day ranged from probable to unreliable values and was in the range of 13.9–28.7%, and on wax productivity in all cases it was reliable P < 0.05, P < 0.001 and ranged, depending on the trait, from 19.2 to 31.3%.