IMPROVED SELECTION AND BREEDING PARAMETERS OF THE OBROSHYN GRAY BREED GROUP OF GEESE

Abstract

The results of the improvement of the selection and genetic parameters of the goose population obtained by purebred linear breeding and geese with blood transfusion of the large gray breed (IV generation) of Obroshyn breeding are given. The research was conducted on geese of the Obroshyn gray breed group with the aim of increasing the selection and breeding nucleus of geese with high-performance indicators. As a result of the selection and breeding work carried out in 2022, the effectiveness of the introductory crossbreeding of Obroshyn gray geese with great gray geese was proven. Improvement of productive qualities of Obroshyn gray geese was achieved with the infusion of large gray breed blood (IV generation) and preservation of the main qualities of this breed group: good adaptability to local conditions of feeding and maintenance, exterior, quality of meat and feather and down raw materials. Productivity indicators of Obroshyn gray geese (I group) were: laying capacity – 38,4 pcs.; egg weight – 164,0 g; fertilization of eggs – 86,3 %; hatching of goslings – 76,4 %; live weight of geese at the age of 9 weeks - males 4310 g, females - 3800 g; preservation – 95,0 %. Obroshyn gray geese of the 4th generation obtained by transfusion of large gray breed blood (group II) were characterized by correspondingly higher indicators: in terms of laying by 3,1 %, however, fertilization was lower by 5,8 % and hatching was lower by 4.4%. The preservation of geese in this group was higher by 3,2 %, and the live weight at the age of 9 weeks was 4.4% higher in males and 3.2% higher in females. The geese of the II experimental group were superior to their peers from the I group in terms of meat quality, in terms of the weight of the uncut and cut carcass, and the yield of edible parts. Geese of experimental group II were also characterized by better meat productivity at the age of 9 weeks, in which the mass of pectoral muscles was 7.0% higher in males and 1,4 % higher in females, and the mass of thigh muscles was higher in males and females - by 4,0 and 4,8 %, respectively, than in geese of the I group. Geese of experimental group II were also characterized by better meat productivity at the age of 9 weeks, in which the mass of pectoral muscles was 7.0% higher in males and 1.4% higher in females, and the mass of thigh muscles was higher in males and females - by 4.0 and 4.8%, respectively, than in geese of the I group.