Development of newborn lambs of the Tsigay breed, depending on the genotype of the fathers

  • A. Kitaeva
  • I. Slyusarenko
Keywords: sheep, live weight, breed, lamb, ewes, buck lambs, body statues

Abstract

We studied the development of newborn lambs of the Tsigay breed, depending on the genotype of the fathers. As fathers there were two sheep-producers of gissar breed and breeds of merinolandshaft. It was found that the sheep of these breeds, when used on ewes of Tsigay breed, give healthy, viable offspring that has well-developed all the statues of the body and the living mass, which on the average is 3,7‒4,1 kg in ewes and in buck lambs 4,0‒4,3 kg with a fluctuation from 3,5 to5,5 kg.At the present stage of development of the sheep industry, wool, as raw materials, has lost its attractiveness, which leads to negative consequences in fine-fleeced and semi-fine-wool sheep breeding. Production of mutton and lamb meat grows more and more widely.The main source of production of dietary meat of sheep all over the world is semi-fine-grain meat-wool sheep breeding from which not only meat but also high-quality crossbred wool is obtained.One way to increase the productivity of lamb is to keep lambs and their target growing, because only healthy, viable animals can have high productivity and fully realize their genetic potential.In connection with this, the aim of our work was to study the development of newborn lambs obtained from the use of rams of different breed (gissar, merinolandshaft) on Tsigay ewes.To do this, in the obtained offspring such indicators as the viability and general condition of the body visually, the living mass in individuals and twins, the exterior were studied by taking measurements.As a result of the conducted work it was established that the lambs were born healthy, viable with a well developed fur coat. Live weight of lambs at birth is an integral indicator of the growth and development of lambs in the embryonic period.In our studies, the sheep of both breeds produced large offspring both among the buck lambs and ewes. Especially it is visible at the lambs born in number of singles. The live weight of lambs born in the number of twins did not have a significant and reliable difference in the offspring of the sheep of both breeds. However, the tendency to excellence persisted in the descendants of the sheep of the gissar breed.In the offspring of the rams of both breeds, the biological feature of the superiority of the buck lambs over the ewes in the living mass was preserved.The conducted measurements of body articles of newborn lambs testify to the well developed peripheral part of the skeleton. Lambs were born high-legged, narrow-bodied with a slightly elongated body, which is typical for the ex-terrier of newborn lambs of most breeds of sheep. However, tendencies to a preponderance of the body measurements were observed in the offspring of the gissar rams in comparison with the descendants of the merino-landshaft breed.

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Published
2017-07-07
Section
Agricultural sciences (animal husbandry)