Main Article Content
Abstract
Numerous papers have been published on body cattle angularities subject in a few backward decades. However, the preeminent body angularities to the milk yield are unstipulated assertively. Hence, the current odyssey was to determine the transcendence body angular of dairy cattle interrelated with the milk yield for selection preferences. In total, 121 head of Holstein cows and seven reputable cattle body angularities were engaged as samples and measured variables for investigation. The software R version 4.2.1 and RStudio was operated simultaneously to facilitate statistical analysis. Later, the principal components (PCA), correlation, and regression analysis were carried out in that order. The PCA specified the thurl angle (TLA), hock side view angle (HSA), hock back views angle (HBA), and fore udder angle (FUA) as crucial factors of body cattle angularities. Then, the correlation analysis appointed HBA and TLA in series as the best trait related to milk yields. The regression analysis was merely entrusted to the HBA as a factor for prognosticating milk yield potency. Thus, the upshot of the ongoing exploration prompted the HBA as the main priority for milk yield selection preferences, followed by TLA. Both were usable on the calf, heifer, and cow selection scheme but should be enforced regularly.
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https://doi.org/10.5935/1806-6690.20200060
Alcantara, L. M., Baes, C. F., de Oliveira Junior, G. A., & Schenkel, F. S. (2022). Conformation traits of Holstein cows and their association with a Canadian economic selection index. Canadian Journal of Animal Science, 102(3), 490-500.
https://doi.org/10.1139/CJAS-2022-0013
Battagin, M., Sartori, C., Biffani, S., Penasa, M., & Cassandro, M. J. (2013). Genetic parameters for body condition score, locomotion, angularity, and production traits in Italian Holstein cattle. Journal of Dairy Science, 96(8), 5344-5351.
https://doi.org/10.3168/jds.2012-6352
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http://www.jstor.org/stable/25562515
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https://doi.org/10.15232/S1080-7446(15)30901-3
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https://doi.org/10.3168/jds.S0022-0302(98)75678-4
Boettcher, P., Dekkers, J., Warnick, L., & Wells, S. (1998). Genetic analysis of clinical lameness in dairy cattle. Journal of Dairy Science, 81(4), 1148-1156.
https://doi.org/10.3168/jds.S0022-0302(98)75677-2
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https://doi.org/10.4067/S0301-732X2015000100014
Capion, N., Thamsborg, S., & Enevoldsen, C. (2008). Conformation of hind legs and lameness in Danish Holstein heifers. Journal of Dairy Science, 91(5), 2089-2097.
https://doi.org/10.3168/jds.2006-457
Cassell, B., Pearson, R., Stoel, J., & Hiemstra, S. (1990). Relationships between sire evaluations for linear type traits and lifetime relative net income from grade or registered daughters. Journal of Dairy Science, 73(1), 198-204.
https://doi.org/10.3168/jds.S0022-0302(90)78664-X
Chapinal, N., Koeck, A., Sewalem, A., Kelton, D., Mason, S., Cramer, G., & Miglior, F. (2013). Genetic parameters for hoof lesions and their relationship with feet and leg traits in Canadian Holstein cows. Journal of Dairy Science, 96(4), 2596-2604.
https://doi.org/10.3168/jds.2012-6071
Çilek, S., & Tekin, M. E. (2006). Calculation of adjustment factors for standardizing lactations to mature age and 305-day and estimation of heritability and repeatability of standardized milk yield of Simmental cattle reared on Kazova state farm. Turkish Journal of Veterinary Animal Science, 30(3), 283-289.
https://journals.tubitak.gov.tr/veterinary/vol30/iss3/1/
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https://doi.org/10.1186/1471-2164-12-408
Dahiya, S. (2006). The genetics of udder type scores in dairy cattle-a review. Journal of Agricultural Reviews, 27(1), 53-59.
https://arccjournals.com/journal/agricultural-reviews/ARCC4167
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