Keywords: tupping rams, heeders, ewe, wool, genotype, physical and technical parameters, young ewes
The formation of comprehensive knowledge of the assessment of physical and technical parameters of sheep wool depending on sex and genotype is one of the problems of animal biology, which is due to the requirements of the theory and practice of sheep breeding, as well as the wool processing industry, although the production of an increasing number of synthetic and artificial fibers. Actually obligatory evaluation of physical and technical parameters of wool is regulated by the current state standards and instructions on conducting breeding work, which determines productivity of selection in relation to further improvement of sheep breeds. However, the available information in the prevailing majority of literature sources on the quality of wool concerns sheep of meat-wool and wool-meat direction of productivity. As for sheep of meat production, in particular the newly created domestic breeds such materials are almost absent which determines the relevance of the work done.
The foregoing article presents the results of the laboratory evaluation of differences in quality indicators of wool of the Dnieper beef sheep breed in relation to their sex and genotype. The research objects are young ewes, heeders, ewes and tupping rams. The experiments have been conducted in the conditions of the analytical laboratory for evaluation of wool quality and the breeding center for sheep breeding of the Institute of animal sciences NAAS. The obtained data indicate that young ewes of the line 024/063 (Ml) have a larger length of wool on the compared topographic areas of the fleece, such as on the back (by 23-69%), maw (by 25-30%), thigh (by 2,5-4,6%). The larger length of wool on maw is characteristic of ewes and tupping rams of this line. The sheep of all sex and age groups, which belonged to the line 024/063 (Ml) are reported to be characterized with the highest wool alignment by length within the evaluated topographic areas of the fleece. In spite of the mentioned differences in the indicator of wool fineness, the examinee sheep of these groups are quite homogeneous. The wool fineness in the groups of ewes and young ewes is within the range of 58-60 quality assortments, while the wool fineness of the replacement heeders and the tupping rams is within the range of 56-60 quality assortments.
- Vdovychenko, Yu. V., & Zharuk, P. H. (2019). Henetychni resursy ovets v Ukraini [Genetic resources of sheep in Ukraine] Visnyk ahrarnoi nauky, 5 (794), 38–44. https://doi.org/10.31073/agrovisnyk201905-05 [In Ukrainian].
- Daetwyler, Hans D., Henshall, J. M., Dominik, S. & Hickey, J. M. (2010). Accuracy of estimated genomic breeding values for wool and meat traits in a multi-breed sheep population. Anim. Prod. Sci., 50 (12), 1004-1010. https://doi.org/10.1071/AN10096
- Swan, P. (2010). The future of wool as an apparel fibre. In: Cottle D. J. (Editor). International Sheep and Wool Handbook. Nottingham University Press. Nottingham, 647-660.
- Swan, A. A., Purvis, I. W., & Piper, L. R. (2008). Genetic parameters for yearling wool production, wool quality and bodyweight traits in fine wool Merino sheep. Aust. J. Expt. Agric., 48, 1168-1176. https://doi.org/10.1071/EA07425
- Wood, E. (2003). Textile properties of wool and other fibres. Wool Tech. Sheep Breed., 51 (3), 272-290.
- Warn, L. K., Geenty, K. B., McEachern, S. (2006). Wool meets meat: Tools for a mode-rn sheep enterprise. In: Cronjé P., Maxwell D. K. (Eds.). Australian Sheep Industry Cooperative Research Centre Conference, Orange. Australia, P. 60-69.
- Poppi, D. P., McLennan, S. R. (2010). Nutritional research to meet future challenges. Anim. Prod. Sci., 50 (6), 329-338. https://doi.org/10.1071/AN09230
- Allden, W. G. (2001). Feed intake, diet composition and wool growth. University of New England Publishing Unit. Armidale, 61-78.
- Honchar, A. O. (2011). Vykorystannia porody ovets sharole v prydniprovskomu rehioni [Use of the Charolais sheep breed in the Dnieper region.] Suchasni problemy selektsii rozvedennia ta hihiieny, 9 (49), 94-98. [In Ukrainian].
- Pokhyl, V. I., & Honcharov, A. O. (2012). Formuvannia vovnovoho pokryvu v ovets ri-znoho napriamu produktyvnosti [The formation of the wool cover in sheep of different directions of productivity] Tavriiskyi naukovyi visnyk, 81, 295-298. [In Ukrainian].
- Reis, P. J. (2000). Effects of amino acids on the growth and properties of wool. Univ. New England Publishing Unit. Armidale, 223-242.
- Vovchenko, B. O., Finchenko, O. V., Savchenko, I. M. (2012). Vyvchennia vovnovoi produktyvnosti ovets pry zghodovuvanni sirkovmisnykh rechovyn v umovakh fermerskoho hospodarstva ,,Zelenyi ranok” Tsiurupynskoho raionu Khersonskoi oblasti [The study of wool productivity of sheep when fed with sulfur-containing substances in the conditions of the “Green Morning” farm in the Tsiurupyn district of the Kherson region.] Tavriiskyi naukovyi visnyk. 78, 2 (2), 41-45. [In Ukrainian].
- Corbett, J. L. (2000). Variation in wool growth with physiological state. Univ. New England Publishing Unit. Armidale. P. 79-98.
- Pokhyl, V. I., & Mykolaichuk, L. P. (2019). Vikova minlyvist vovnovoho pokryvu ovets romanivskoi porody [Age-related variability of the wool coat of Romanov sheep]. Theoretical and Applied Veterinary Medicine. 7 (3), 172‒176. https://doi.org/10.32819/2019.71031 [In Ukrainian].
- Jamshed Khan M., Abbas, A., Ayaz, M., Naeem, M., Saleem Akhter, M., & Hussain Soomro, M. (2012). Factors affecting wool quality and quantity in sheep. African Journal of Biotechnology. 11 (73), 13762-13766. https://doi.org/10.5897/AJBX11.064
- Korbych, N. M., & Chernova, T. V. (2021). Vzaiemozviazok dovzhyny vovny z pokaznykamy rostu ta vovnovoi produktyvnosti v ovets riznykh linii tavriiskoho typu askaniiskoi tonkorunnoi porody [The relationship between wool length and growth and wool productivity in sheep of different lines of the Taurian type of the Askanian fine-wool breed] Tavriiskyi naukovyi visnyk, 121, 139-145. https://doi.org/10.32851/2226-0099.2021.121.20 [In Ukrainian].
- Bottomley, G. A. (2001). Weather conditions and wool growth. Univ. New England Publishing Unit. Armidale, 115-125.
- Ryder, M. L. (2000). Coat structure and seasonal shedding in goats. Anim. Prod., 8, 289-302. https://doi.org/10.1017/S000335610003467X
- Gillespie, J. R., & Flanders, F. B. (2010). Modern livestock and poultry production. 8th Edition, Delmar Cengage Learning, Clifton Park. NY. 1059 p.
- Cottle, D. J. (2010). Wool preparation and metabolism. In: Cottle, D.J. (Editor), International Sheep and Wool Handbook. Nottingham University Press, Nottingham, UK,. 581-618.
- Rowe, J. B. (2010). The Australian sheep industry – undergoing transformation. Anim. Prod. Sci., 50 (12), 991-997. https://doi.org/10.1071/AN10142
- Lee, G. J., Thornberry, K. J., & Williams, A. J. (2001). The use of thyroxine to reduce average fibro diameter in fleece wool when feed intake is increased. Aust. J. Expt. Agric., 41, 611-617.
- Edriss, M. A., Dashab, G., Ghareh Aghaji, A. A. Nilforooshan, M. A., & Movassagh, H. (2007). A study of some physical attributes of Naeine sheep wool for textile industry. Pakistan J. Biol. Sci., 10, 415-420. https://doi.org/10.3923/pjbs.2007.415.420
- Kelly, M. J., Swan, A. A., & Atkins, K. (2007). Optimal use of on-farm fibre diameter measurement and its impact on reproduction in commercial Merino flocks. Aust. J. Expt. Agric., 47 (5), 525-534. https://doi.org/10.1071/EA06222
- Jones, C., Menezes, F. M., & Vella, F. (2004). Auction price anomalies: Evidence from wool auctions in Australia. Econ. Rec., 80 (250), 271-288. https://doi.org/10.1111/j.1475-4932.2004.00188.x
- Mortime, S. I., Atkins, K., Semple, S. J. & Fogarty, N. M. (2010). Predicted responses in Merino sheep from selection combining visually assessed and measured traits. Anim. Prod. Sci., 50 (10), 976-982. https://doi.org/10.1071/AN10085
- Valera, M., Arrebola, F., Juárez, M. & Molina, F. A. (2009). Genetic improvement of wool production in Spanish Merino sheep: genetic parameters and simulation of selection strategies. Anim. Prod. Sci., 49 (1), 43-47. https://doi.org/10.1071/EA07061
- Angel, C., Beare, S., & Zwart, A. C. (1990). Product characteristics and arbitrage in the Australian and New Zealand wool markets. Aust. J. Agr. Econ., 1990, 34, 67-79. https://doi.org/10.1111/j.1467-8489.1990.tb00493.x
- Wood, E. J. (2010). Wool processing. In: Cottle D. J. (Editor). International Sheep and Wool Handbook. Nottingham University Press. Nottingham. UK. 766.
- On the protection of animals from cruelty № 3447-IV Vidomosti Verkhovnoi Rady Ukrainy. 2006, № 27, Article 230 [In Ukrainian].