Abstract
Sheep farming plays an important role in the production of meat. Romanov breed is known for its high fertility and therefore is used all over the world due to increased production of lambs and lamb meat. Meat products are the main food elements of the man. Most of the inhabitants of industrialized countries cannot imagine their menu without meat. Value of meat for human health is known, it supplies protein to the body. The Yaroslavl Region is a leading region of the Romanov sheep breed. Therefore, the aim of our research was to determine the strength and reliability of the influence of the factor ?genetic value of the father? on productive characteristics of animals as a factor that helps to increase the productivity of animals. Upon determining the strength of the influence of factors for statistical data have used the procedure of generalized linear models (General Linear Models - GLM), and evaluation components of phenotypic variation attributes were analyzed by multivariate dispersive analysis. Our research has allowed allocating rams with genetic value that has the improving effect. Using the recommended lines the farmers of the Yaroslavl region may increase productive characteristics of animals and the profit of the farms and improve the efficiency of breeding.
Highlights
Intensification of agricultural production, including sheep and the increase in the demand of products in this sector has accompanied by the creation of new more productive and profitable breeds (Petrovic, 2006)
The preservation of the gene pool of sheep as well as known, highly productive, rare and unique species for use in crossbreeding is important in the development of sheep breeding (Moskalenko and Nikolaeva, 2013)
We estimated the influence of the factor «genetic value of the father» on the variability of productivity characteristics of Romanov breed ewes in gene pool farms of Yaroslavl region according to the methodology of the research
Summary
Intensification of agricultural production, including sheep and the increase in the demand of products in this sector has accompanied by the creation of new more productive and profitable breeds (Petrovic, 2006). The identification of superior rams and their disproportionate genetic contribution via artificial insemination has lifted the pace of genetic gain for production traits (El Hanafy and El Saadani, 2009; Kijas et al, 2012). The preservation of the gene pool of sheep as well as known, highly productive, rare and unique species for use in crossbreeding is important in the development of sheep breeding (Moskalenko and Nikolaeva, 2013). The rams rated by their own productivity and origin are often used for breeding in small farms. Sometimes well-known parents do not give offspring of the same quality, as they are (Arseniev, 2011; Caro Petrovic et al, 2013)
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