New broiler cross paternal parent form

Abstract

The results of the research showed that on the basis of the new lines CM5 and CM6 of the Cornish breed, selected using the gene pool of the SMC “Smena”, a new paternal parental form CM56 was created, which has high: live weight of young animals, safety of birds, fertilization of eggs, hatching of chickens at (0.3-8.2%) in comparison with the paternal parental form B56 of the cross “Smena 8”. The weight of the testes of males of the paternal parent form during the anatomical dissection of the Smena 9 cross was equal to 39.8 g (30 weeks) and 43.1 g (34 weeks), their relative weight (to live weight) was 0.89 and 0.92 %; cross “Smena 8” - 39.5 g and 43.0 g; 0.88 and 0.91%, respectively, for the indicated ages. In roosters of the paternal parental form of the “Smena 9” cross, there was a tendency towards a slight decrease in their live weight by age (30 and 34 weeks), as well as a slight increase in the absolute and relative weight of the testes in comparison with the “Smena 8” cross. Broilers of the “Smena 9” cross, obtained from the use of CM56 roosters, had advantages in live weight at 5 weeks of age by 10.1%, feed costs per 1 kg of live weight gain - by 4.5%, and safety - by 1.1 %, productivity index - a complex indicator - by 16.7% compared to the cross “Smena 8”. Poultry of the paternal parent form and broilers of the “Smena 9” cross with a high genetic potential of important economically useful traits, is competitive, can be used in reproductive farms, parent flocks and broiler poultry farms.