Milkability differences based on lactation peak and parity in Holstein cattle

Vrhel, Marek; Ducháček, Jaromír; Gašparík, Matúš; Vacek, M; Codl, Radim; Pytlík, Jan

doi:10.22358/jafs/142125/2021

Cited by 5 publications

(2 citation statements)

References 31 publications

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“…For example, Doğan and Özdamar ( 2003 ) and Berry et al ( 2007 ) investigated the factors that impacted milk yield in Holstein Frisian cows using classical linear and nonlinear regression models. Other research carried out by previous authors (Akçay et al 2007 ; Koçak et al 2007 ; Tilki et al 2008 ; Aksakal and Bayram 2009 ; Petrovic et al 2009 ; Atashi et al 2021 ; Vrhel et al 2021 ) reported the effects of calving season, gender, type of birth, and number of births on birth weight of Holstein dairy cattle using analysis of variance procedures and the ordinary multiple regression models. Additionally, in recent studies by Valchev et al ( 2020 ), Van Eetvelde et al ( 2020 ), and Temesgen et al ( 2022 ), the factors affecting milk yield were identified using regression-based models, but without handing the ordered nature of milk yield trait.…”

Section: Introductionmentioning

confidence: 98%

The estimation and interpretation of ordered logit models for assessing the factors connected with the productivity of Holstein–Friesian dairy cows in Egypt

Moawed

El-Aziz

2022

Trop Anim Health Prod

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The incorporation of novel technologies such as artificial intelligence, data mining, and advanced statistical methodologies have received wide responses from researchers. This study was designed to model the factors impacting the actual milk yield of Holstein–Friesian cows using the proportional odds ordered logit model (OLM). A total of 8300 lactation records were collected for cows calved between 2005 and 2019. The actual milk yield, the outcome variable, was categorized into three levels: low (< 4500 kg), medium (4500–7500 kg), and high (> 7500 kg). The studied predictor variables were age at first calving (AFC), lactation order (LO), days open (DO), lactation period (LP), peak milk yield (PMY), and dry period (DP). The proportionality assumption of odds using the logit link function was verified for the current datasets. The goodness-of-fit measures revealed the suitability of the ordered logit models to datasets structure. Results showed that cows with younger ages at first calving produce two times higher milk quantities. Also, longer days open were associated with higher milk yield. The highest amount of milk yield was denoted by higher lactation periods (> 250 days). The peak yield per kg was significantly related to the actual yield (P < 0.05). Moreover, shorter dry periods showed about 1.5 times higher milk yield. The greatest yield was observed in the 2nd and 4th parities, with an odds ratio (OR) equal to 1.75, on average. In conclusion, OLM can be used for analyzing dairy cows’ data, denoting fruitful information as compared to the other classical regression models. In addition, the current study showed the possibility and applicability of OLM in understanding and analyzing livestock datasets suited for planning effective breeding programs.

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Section: Introductionmentioning

confidence: 98%

The estimation and interpretation of ordered logit models for assessing the factors connected with the productivity of Holstein–Friesian dairy cows in Egypt

Moawed

El-Aziz

2022

Trop Anim Health Prod

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“…Moreover, the Holstein cow exhibits an exceptional ability to maintain its milk production levels over many lactation cycles, which have been shown to improve milk quality with each successive lactation [1]. Several studies have reported that milk production is generally higher in multiparous cows than in primiparous cows [2][3][4], along with having a higher milk protein and fat content [3]. Furthermore, parity has also been found to impact the composition of milk fatty acids in Holstein cows.…”

Section: Introductionmentioning

confidence: 99%

Metabolic Changes in Serum and Milk of Holstein Cows in Their First to Fourth Parity Revealed by Biochemical Analysis and Untargeted Metabolomics

Liu,

Jiang,

et al. 2024

Animals

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The performance of dairy cows is closely tied to the metabolic state, and this performance varies depending on the number of times the cows have given birth. However, there is still a lack of research on the relationship between the metabolic state of Holstein cows and the performance of lactation across multiple parities. In this study, biochemical analyses and metabolomics studies were performed on the serum and milk from Holstein cows of parities 1–4 (H1, N = 10; H2, N = 7; H3, N = 9; H4, N = 9) in mid-lactation (DIM of 141 ± 4 days) to investigate the link between performance and metabolic changes. The results of the milk quality analysis showed that the lactose levels were highest in H1 (p = 0.036). The total protein content in the serum increased with increasing parity (p = 0.013). Additionally, the lipase activity was found to be lowest in H1 (p = 0.022). There was no difference in the composition of the hydrolyzed amino acids in the milk among H1 to H4. However, the free amino acids histidine and glutamate in the serum were lowest in H1 and highest in H3 (p < 0.001), while glycine was higher in H4 (p = 0.031). The metabolomics analysis revealed that 53 and 118 differential metabolites were identified in the milk and serum, respectively. The differential metabolites in the cows’ milk were classified into seven categories based on KEGG. Most of the differential metabolites in the cows’ milk were found to be more abundant in H1, and these metabolites were enriched in two impact pathways. The differential metabolites in the serum could be classified into nine categories and enriched in six metabolic pathways. A total of six shared metabolites were identified in the serum and milk, among which cholesterol and citric acid were closely related to amino acid metabolism in the serum. These findings indicate a significant influence of blood metabolites on the energy and amino acid metabolism during the milk production process in the Holstein cows across 1–4 lactations, and that an in-depth understanding of the metabolic changes that occur in Holstein cows during different lactations is essential for precision farming, and that it is worthwhile to further investigate these key metabolites that have an impact through controlled experiments.

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Estimates of Genetic and Phenotypic Parameters of Milkability Traits in Holstein Friesian and Simmental Cows

KAYGISIZ

2023

Uluslararası Tarım Ve Yaban Hayatı Bilimleri Dergisi

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Bu çalışma da Kahramanmaraş ilinde yetiştirilen Siyah Alaca ve Simental sığırların süt akış hızı, sağım süresi ve süt verimine ilişkin fenotipik ve genetik parametre tahminleri elde edilmiştir. Araştırmada 150 baş Siyah Alaca ve 40 baş Simental ineğin süt verim kayıtları kullanılmıştır. Süt akış hızı, sağım süresi ve süt verimine ilişkin genel ortalamalar Siyah Alaca ırkında; 1.370.004 kg dak-1, 16.700.017 dak ve 21.320.026 kg, Simental ırkında ise 1.0470.007 kg dak-1, 17.740.034 dak ve 16.820.049 kg olarak hesaplanmıştır. Mevsim etkisi her iki ırkta da tüm özellikler için önemli (P0.0001) bulunmuştur. Sağım zamanı etkisi ise Siyah Alaca ırkında günlük süt verimi ve süt akış hızı, Simental ırkında ise günlük süt verimi ve sağım süresi için önemli (P0.0001) bulunmuştur. Süt akış hızı, sağım süresi ve süt verimine ilişkin kalıtım dereceleri Siyah Alaca ırkında; 0.110.015, 0.320.03 ve 0.130.02, Simental ırkında ise 1.0470.007 kg dak-1, 17.740.034 dak ve 16.820.049 kg olarak hesaplanmıştır. Her iki ırkta da sağım özellikleri arasındaki genetik korelasyonlar orta-yüksek bulunmuştur. Bu çalışmada ele alınan özelliklerin kalıtsal olduğu ve seleksiyonla geliştirilebileceği sonucuna varılmıştır.

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Milkability differences based on lactation peak and parity in Holstein cattle

Cited by 5 publications

References 31 publications

The estimation and interpretation of ordered logit models for assessing the factors connected with the productivity of Holstein–Friesian dairy cows in Egypt

The estimation and interpretation of ordered logit models for assessing the factors connected with the productivity of Holstein–Friesian dairy cows in Egypt

Metabolic Changes in Serum and Milk of Holstein Cows in Their First to Fourth Parity Revealed by Biochemical Analysis and Untargeted Metabolomics

Estimates of Genetic and Phenotypic Parameters of Milkability Traits in Holstein Friesian and Simmental Cows

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