Trends for the formation of skin and fleece structure inthe sheep stock breeding

Journal of Livestock Science

article

O.K. Gogaev¹  A.R. Demurova¹  M.D. Basaeva¹ 

[1] Gorsky State Agrarian University;North Caucasus Research Institute of Mining and Foothill Agriculture - a branch of the Federal State Budgetary Institution of Science of the Federal Scientific Center "Vladikavkaz Scientific Center of the Russian Academy of Sciences"

关键词: natural fleece length;    hair follicles;    correlation coefficient;    wool clip;    fleece thickness;   

DOI  :  10.33259/JLivestSci.2020.116-121

学科分类：农业科学（综合）

来源: Journal of Livestock Science

【 摘 要 】

One of the important issues of breeding is to develop animal breeding methods in order to improve theirpedigree and productive qualities. To solve this issue, studies were conducted on farms of the Republic of NorthOssetia-Alania. Age-related changes in the skin and fleece structure were studied using purebred and crossbredewes, typical for their breed. The trend of age-related changes in the skin and fleece were studied using the adequatesamples taken from the same experimental animals at different age periods. Preparations of skin specimens wereproduced and studied according to the method of N.A. Diomidova et al. (1960). The correlations between similarand dissimilar parameters of skin and fleece are determined. On their basis it is found that sheep within each breedhave high positive correlations between similar and dissimilar parameters of skin and fleece. These correlations arefound not only when comparing data in animals of the same age. Data on the correlation coefficients of the samesheep at birth, at an older age and in adulthood enable early selection of lambs according to the morphologicalparameters of the skin. The following parameters can be considered as main ones in the future wool productivitywhen selecting lambs at an early age within each breed and herd: - as fleece density parameters: follicles number perunit of skin area and in a group (complex), numerical ratio of the secondary follicles to primary ones; - the hairfollicles depth as an index of the fleece length; - the ratio of the primary fibers fineness to secondary ones, as well asthe primary hair follicles width to the width of secondary ones as fleece equal indices in fineness; - the ratio of theprimary follicles depth to the depth of secondary ones as a fleece equal index in length.

【 授权许可】

Unknown