Search academic texts

Information × Registration Number 0221U101766, 0116U001184 , R & D reports Title To develop a methodology for creating high-performance genotypes of beef cattle. popup.stage_title Head Vdovychenko Yurii V, Registration Date 25-01-2021 Organization MF Ivanov Askania-Nova Institute of Steppe Animal Husbandry - National Scientific Breeding and Genetics Center for Sheep Breeding popup.description2  Object of research - the formation of the Southern Beef cattle economically useful traits when bred under intense heat load. The purpose of the work is to develop a methodology for creating high-performance genotypes of Beef Cattle for breeding under intense heat load using genotypes of the Southern Beef Breed. Research methods: zootechnical, physiological, population genetic, retrospective and comparative analyzes, biometric. Animals of the Southern Beef Breed are characterized by high heat resistance. Heat resistance indices, calculated by the methods of Yu. О. Rauschenbach and Roud, at temperature load, when the air temperature is above 30 ° C, have larger values - 87.02-87.86 and 84.91-88.72, respectively, and indicate stability animals to hot climates. During the study period, the average live weight of bulls at 12 and 15 months significantly (P> 0.95) increased in comparison with 2008 by 6.3-18.1 kg, or 1.9-9.6%, and with the level of the monitoring period - by 210 days. (P> 0.999) and 12 and 15 months. - by 9-13.4 kg, or 2.8-7% (P> 0.95) and reached the level of class I and the elite. In heifers during the study period, the average live weight at the age of 210 days increased significantly (P> 0.95). - by 15.1 kg, or 8.6% compared to 2008, and in other age periods by 2.8-9.2 kg, or 0.9-5.1% and reached the level of the elite class. The live weight level of the Southern Beef Cows of different intrabred types for the study period (years with different levels of heat load) at the age of 3 years is 489.9-541.0 kg, 4 years - 523.4-560.1 kg, 5 years - 536.5-580.3 kg and corresponds to the elite-record, elite and I-st breed standards. Heritability coefficients of live weight are 0.24-0.57 (p <0.001). The indicators of the cows’ reproductive capacity were at the such level: the inter-calving period from 374 to 436 days, the coefficient of reproductive capacity from 0.884 to 0.989. Product Description popup.authors Pysarenko Andrii V Fursa Nataliia M popup.nrat_date 2021-01-25 Close