HERITABILITY OF LINEAR TRAITS OF THE TYPE OF COWS OF THE UKRAINIAN RED-AND-WHITE DAIRY BREED AND THEIR RELATIONSHIP WITH TRAITS OF PRODUCTIVITY AND LONGEVITY
Keywords:
Ukrainian Red-and-White, breed, linear type estimation, correlation, heritability, milk productivity, longevity.
Abstract
The purpose of this study was to determine the heritability level linear traits of the type of cows of the Ukrainian Redand- White dairy breed with estimation of the connective variability between linear traits and milk productivity, and to study the effect of the final score on this traits of cows longevity. The level of heritability of group traits testified about the effectiveness of mass selection of cows by dairy type (h2=0.487), body structure (h2=0.445), udder (h2=0.484) and final score (h2=0.533). The heritability of descriptive traits differed in variability from h2=0.112 (hooves angle) to h2=0.575 (fore udder parts attachment). High correlation coefficients were obtained between groups of linear traits characterizing the dairy type (r=0.502), body (r=0.488) and udder (r=0.537), and milk yield for 305 days of the first lactation. The correlation coefficients between the listed groups of linear traits and milk fat were almost at the same level (r=0.455-0.514). The highest correlation coefficients were found between the final score and traits of milk productivity, especially with milk yield (r=0.568) and milk fat output (r=0.552). According to the estimation of descriptive traits that characterize the conformation type of cows, a close and positive effect on the amount of milk and milk fat yield had : height (r=0.382 and 0.331), body depth (r=0.481 and 0.437), angularity (r=0.522 and 0.524), rump width (r=0.477 and 0.454), fore udder attachment (r=0.564 and 0.488), rear udder attachment (r=0.487 and 0.462), central ligament (r=0.466 and 0.428) and locomotion (r=0.322 and 0.318). The relationship of chest width (r=0.133) and rump angle (r=0.236) with milk yield and milk fat (r=0.155 and 0.212) was positive, but slightly weak. In terms of lifetime, economic use and lactation, cows with a final score of "Very good" prevailed over groups of cows with a lower score "Good with plus" and "Good" with a difference in 238 and 979, 171 and 932, 141 and 936 days, respectively (P <0.05-0.001). For a lifetime milk yield and milk fat output, the group of cows with score "Very good" prevailed over a groups scored in "Good plus" and "Good" by 6039 and 30693 kg of milk and 216.3 and 1161.8 kg of milk fat (Р<0.001). The existing high positive correlation of descriptive linear traits with indicators of milk productivity of cows and the correlative relationship of the final score with longevity traits attested about the prognostic value of applying linear classification for indirect early selection of cows with the aim of increasing the efficiency of lifetime use.
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12. Elisandra, L. Kern, Jaime, A. Cobuci, Cláudio, N. Costa, Concepta, M. McManus, Gabriel, S. Campos, Tatiana, P. Almeida, Rafael, V. Campos. (2014). Genetic association between herd survival and linear type traits in Holstein cows under tropical conditions. Italian J. Animal Science. 13:3419. https://www.tandfonline.com›ijas.2014.3419
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15. Gladiy, M.V., Polupan, Yu.P., Bazyshina, I.V., Pochukalin, A.E. [et. al.]. (2016). Henezys i perspektyvy chervonoi molochnoi khudoby v Ukraini. [Genesis and prospects of Red dairy cattle in Ukraine]. Rozvedennia i henetyka tvaryn. Vinnytsia, issue 51, pp. 41–60 (in Ukrainian)
16. ICAR Recording Guidelines approved by the General Assembly held in Berlin, Germany, on May 2014. Copyright: 2014, ICAR, pp. 618.
17. Imbayarwo-Chikosi, V.E., Dzama, K., Halimani, T.E., Van Wyk, J.B., Maiwashe, A., Banga, C.B. (2015). Genetic prediction models and heritability estimates for functional longevity in dairy cattle. South African Journal of Animal Science, no. 45(2), pp. 106–121.
18. Interbull MACE for conformation. (1999). Holstein type-production Sire Summaries. no. 3, pp. 8–10.
19. Jovanovac, S., Raguž, N. (2011). Analysis of the relationships between type traits and longevity in Croatian Simmental cattle using survival analysis. Agriculturae Conspectus Scientificus, no. 76(3), pp. 249–253.
20. Kan, Y.Z., Shi, S.K. (1993). Genetic evaluation of linear type traits with an animal model. Acta Veterinaria et Zootechnica Sinica, no. 24(4), 294–300.
21. Kern, E.L., Cobuci, J.A., Costa, C.N., McManus, C.M., Braccini, N.J. (2015). Genetic association between longevity and linear type traits of Holstein cows. Scientia Agricola, no. 72(3), pp. 203–209.
22. Kern, E.L., Cobuci, J.A., Costa, C.N., Pimente, C.M.M. (2014). Factor analysis of linear type traits and their relation with longevity in Brazilian Holstein cattle. Asian Australas. J. Anim. Sci., no. 27(6), pp. 784–790.
23. Kern, E.L., Cobuci J.A., Costa, C.N., McManus, C.M., Campos, G.S., Almeida, T.P., Campos, R.V. (2014). Genetic association between herd survival and linear type traits in Holstein cows under tropical conditions. Italian J. Animal Science, no. 13, p. 3419.
24. Khan, M.A., Khan, M.S. (2016). Genetic and phenotypic correlations between linear type traits and milk yield in Sahiwal cows. Pak. J. Agri. Sci., no. 53(2), pp. 483–489.
25. Khmelnychyi, L.M. (2013). Liniina klasyfikatsiia molochnoi khudoby v Ukraini: metodolohichni aspekty. [Linear classification of dairy cattle in Ukraine: methodological aspects]. Tvarynnytstvo Ukrainy, no. 1(2), pp. 31–33 (in Ukrainian).
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Published
2023-02-27
How to Cite
Povod, N. H., Samokhina, Y. A., & Khmelnychyi, S. L. (2023). HERITABILITY OF LINEAR TRAITS OF THE TYPE OF COWS OF THE UKRAINIAN RED-AND-WHITE DAIRY BREED AND THEIR RELATIONSHIP WITH TRAITS OF PRODUCTIVITY AND LONGEVITY. Bulletin of Sumy National Agrarian University. The Series: Livestock, (4), 23-32. https://doi.org/10.32845/bsnau.lvst.2022.4.4
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