Reproduction of farm animals is one of the main indicators determining their biological and economic value. Highly efficient reproduction promotes the increase of livestock number and improvement of animal breeding technique. The reproductive qualities of goats depend on genetic factors and environmental conditions: age, fatness, live weight of queens, feeding level before mating and during pregnancy, daylight hours, etc. A goal has been set to study the fertility of goats and the live weight of newborn Saanen goats, bred in the goat farm of Krashen village, in the Shirak region. To analyze the goat fertility, 40 queens were taken into consideration depending on their lactation age, among which 47.5% were first-born, 5.0 % - second-born, 45.0 % were the third lambing and one doe was the fourth lambing. The studies were carried out on the queens of 2-4 years. In our opinion, it is this age, that is optimal for characterizing the queens in terms of fertility, since the first mating of goats is carried out at the age of 10 months, provided that the live weight of the young is 70-75 % of the mother's weight, but not less than 30-32 kg. Such a new approach to the technological solution makes it possible to obtain one lamb more from each queen during economic use than with conventional technology. The data obtained can be used in breeding farms for the production and sale of young animals, and the development of goat breeding in the republic.

The conducted investigations testify that due to the genotypes and their occurrence frequency in mother turkeys, the numerical sex ratio undergoes certain changes in the generation. Males emerged from the mothers with TfAA CpCD HbAB and TfBD CpCD HbAA genotypes make up about 78 and 69 %, whereas females produced from the mothers with TfAA CpCD HbAB and TfBD CpCD HbAA genotypes are 65 %. The number of males and females produced from the mothers with TfAB CpBD HbCC, TfBC CpAB HbBD and TfCD CpCC HbCD genotypes is equal (P>0,999). The obtained outcomes can be applied in the turkey breeding activities as genetic markers.

The issues related to the study of multiparity in agricultural animals as a prior biological property, and those to making it more manageable were raised in the scientific research field still at the beginning of previous century. To solve the mentioned issues multiple approaches and hypotheses were drawn forward in different periods, but they were very often mutually exclusive. The article considers the genetic characteristic of multiparous goats per the loci of some polymorphous proteins in the blood and milk with the aim of applying the detected genetic markers in the selection process of the branch.

The research has been conducted on “Agroholding” sheep farm, where 860 heads of sheep are bred, 66 % of which are Armenian semi-coarse-wool breed and 34 % are other breeds. Sheep bonitation has been conducted according to their breed, age and productivity characteristics. To improve the qualitative composition of the animal stock, breeding and selection works should be continuously implemented on the mentioned farm. It is recommended to apply such breeding technology which would enable to improve not only the breed’s qualitative composition but also to increase both milk and meat productivity.