The article presents the results of research on the productivity of rabbits of different genotypes (growth and development, slaughter and meat indicators, fur productivity); a comprehensive evaluation of the productivity of rabbits in the process of industrial hybridization was carried out. The following research methods were used in the work: zootechnical (productivity, growth and development, reproductive capacity), genetic, biometric (determination of average values and their errors, probabilities of research results). The study was carried out in the FG "Elit" of the Kolomyia district; PE "Western Ukrainian Gardens" of Halytsky District; PP Havrylyuk O. Ya. Bogorodchansky district. The method of pairs of analogues was used in the studies. Their selection took into account genotype, sex, age, live weight, origin, physiological state, lactation period, fertility, productivity (reproduction of female rabbits, fattening and slaughter indicators, etc.). Analogous animals in different groups had maximum similarity, and some differences were allowed within the group. The productivity of female rabbits and young rabbits was evaluated according to the index of reproductive qualities of the female rabbit (Luchin, 2004) and the index of comprehensive assessment (PKO) (Luchin, 2005). The received materials of scientific research were processed by the methods of variational statistics according to V.P. Kovalenko et al. (2010). It was established that different variants of crossing the maternal and paternal forms of the three-breed genotype of rabbits 4/8 white giant 3/8 local chinchilla 1/8 Flanders had different effects on the reproductive indicators of female rabbits and subsequent fattening indicators of young rabbits, in particular, average daily growth and waist width. A successful combination of maternal and paternal forms of rabbits (group 2) was revealed, which in the process of industrial hybridization ensured an increase in multifertility by 8.1 head or 2.5 % (р<0.05), high fertility by 64g or 6.25 % (р<0.05), milk yield by 2.8 kg or 7.2 % (p<0.05), nest weight at 35 days old by 13.4 % (p<0.01). The hybrid young obtained from female rabbits of group 2 (IVYAK + 5 %) was characterized by a higher body weight by 43.8 g or 10.3 % (p<0.001) and waist width by 6.15 cm or 12.2 % (p< 0.001) to 3 control groups. The positive result was achieved due to the effective combination of the initial forms, which in turn ensured high productivity of the stock (heterosis) of the final hybrid and its resistance to climatic and technological conditions of keeping.

The results of the influence of different amounts of triticale grain in feed on productivity, feed conversion and economic parameters of young rabbits for intensive growing technology are presented. For the feeding of experimental young, full-grain granulated feed was used in the structure of which there was a different grain content of triticale: experimental group II – 10.0%, III, IV and V experimental groups – 20.0%, 30.0% and 40.0% respectively. Experimental young rabbits of the first control group fed full-range feed, which was balanced by the main nutrients. According to the results of the research, it was found that from the 2nd week fattening in rabbits of experimental groups, which received a grain of triticale in the diet, an increase in live weight was observed in comparison with the control group. During the whole period of cultivation, the highest average daily gain of live weight was observed in rabbits of experimental group IV, which was 42.5 g, which is 10.1% higher compared to control. The advantage of rabbits II, III and V of experimental groups fed 10.0%, 20.0% and 40.0% of tritiacale derivatives was 3.0, 5.7% and 1.0%, respectively, in comparison with analogues of the control group. A similar trend was observed in terms of the absolute increase in live weight. According to the indicator of integrated assessment (RBC) of young rabbits, based on the average daily gain and width of the lumbar, the highest value was found in youngsters in the IV group (277.95) for the use of mixed fodders containing 30% of the grain yield of Triticale Harroza variety in the diet. The prospects of further research concerning the influence of various amounts of the investigated feed factor on reproductive indices of rabbits are outlined.

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According to the experiment, the productive effect of different amounts of grain of the triticale of Harroz variety in feed for the reproductive indices of feeding rabbits was established. According to the tasks assigned, five groups of nursing rabbits were selected and formed according to the principle of analogues. To feed the experimental nursing rabbits, a full granulated mixed feed was used in the structure of which there was a different content of triticale grain: II research group – 10.0%, III, IV and V research groups - 20.0%, 30.0% and 40.0% respectively . Nursing rabbits of the 1st control group were fed full-fat mixed fodders, which were balanced for the main nutrients, but did not contain triticale grain. In the study of the multiplicity of feeding rabbits with different contents of crushed grain of the triticale of the Harroz variety, it was higher in the 3rd and 4th experimental groups (in the ration of 20 and 30% of the crushed grain of triticale) with an index of 8.0–8.2 heads (P < 0.05). The large-fruited index predominated in the nursing rabbits of the 4th experimental group and amounted to 65 g; in the 1st, 2nd, 3rd and 5th groups it was 62, 63, 64, and 61g. The amount of milk of nursing rabbits is an indicator that positively correlates with fecundity, the weight of rabbits at birth (large-fruited), the preservation of the nest. Milk index was also the best in nursing rabbits of the 4th group and amounted to 2.83 kg, which is 0.09–0.24 kg more than in all other groups (P < 0.01). By the number of rabbits with weaning at 35 days, the fourth group of nursing rabbits predominated, this index was 7.1 g. The average live weight of one head during separation was higher by 40–50 g in the 3rd and 4th test groups compared to the first control group and amounted to 0.75 and 0.76 kg (P < 0.05). According to preliminary indications, the best nest weight in weaning during 35 days was the nursing rabbits of the 4th group – 5.36 kg, which is 0.47 kg higher than the control (P < 0.05). The highest percentage of conservation of rabbits before weaning at 35-day-old age was observed in groups 3, 4 and 5, and was at the level of 94.59; 93.42; 97.1%. It was found that the structure of the ration of nursing rabbits with a content of crushed grain of triticale of Harroz 20, 30 and 40% was significantly influenced the preservation of the nest. The index – the index of the reproductive qualities of feeding rabbits (IVKK), based on the indicators of large-fruited, milk and number of rabbits with weaning (35 days) was higher in feeding rabbits of 3rd and 4th groups and amounted to 126.4 and 128.8. The maximum reproductive indices of feeding rabbits provided a structural content in the diet of 30% of the crushed grain of the triticale of the Harroz variety (the fourth research group). The ration (30% of the triticale crushed grain) ensured the growth of the multiplicity by 8.5%, the size of the fetus by 5%, the milkness of the rabbits by 9%, the weight of the nest at weaning at 35 days old by 9.6%, and the complex index of IVKK by 6.5%.