SELECTION ANALYSIS OF THE FORMATION OF THE REPRODUCTIVE COMPOSITION OF THE NEWLY CREATED UKRAINIAN TROUT BREED GROUP OF HORSES

The object of research was an array breeding mares the newly created Ukrainian trotting breed group horses, registered as 01.01.2023 (n=194). 91.6% all were tested on racetracks with average liveliness 2.12.9 min. quantitative and qualitative indicators investigated array, genealogical structure, effectiveness combinations determined. liveliest selected for stock Dibrivskiy stud (average 2.08.2±0.86 min.). In prize-winning precocity, Zaporizhskiy a high probability (p<0.01) prevail over other farms sprightliness at 2 years age – 2.24.9±1.47 highest record older in (2.05.4±0.64 Of evaluated group, 12% are class 2.05 more lively almost half (48.8%) to 2.10 livelier. majority belong classes 2.05.1-2.10.0 (36.8%), 2.10.1-2.15.0 (19.7%), 2.00.1-2.05 (12,0 %), 2.15.1-2.20 min (9.4%). stud, 10 (32.3%) lively, 21 (67.7%) general, it can be stated that is fairly consolidated feature (Cv=7.28) reproductive composition formed group. According results assessment body measurements, established terms height withers length (p<0.05), so selection strategy this farm aimed right movement combining prize productivity exterior indicators. Mares practically do not differ chest girth wrist. score origin, type, performance given Stud (p<0.05). Lymarivskiy received marks their measured performance. analysis structure determined origin stallions from 6 9 lines. Speedy Crown line most developed (46.7 34.3%, respectively). distance 1600 m (at level livelier) belongs lines: Hut Moon (125.5±1.55 s) Arnie Almahurs (127.6±1.37 s). precocious Low Hanover (142.7±3.17 s), Worthy Boy (143.1±1.53 (144.5±3.75 (146.1±1.71 studied divided into 25 maternal families. show Ruta's mare effectively combined Keywords: mares, combinations, lines, parent families, generation, traits.