Genetic Relationships Among Linear Type Traits and Milk Production Traits of Holstein Dairy Cattle

Bohlouli, Mehdi; Alijani, Sadegh; Varposhti, Mehran Rahimi

doi:10.1515/aoas-2015-0053

Cited by 31 publications

(49 citation statements)

References 35 publications

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“…The factors cited above as an explanation for the difference between the heritability estimates for FL1 and FL2 may also explain why the genetic correlation between FL1 and FL2 was not stronger. The results of genetic correlations were similar to those observed in previously published studies in dairy cattle (Berry et al, 2004;Bohlouli et al, 2015). Bohlouli et al (2015) reported genetic correlations between rear leg rear view and foot angle of -0.67, and between rear leg rear view and rear leg side view of -0.11.…”

Section: Resultssupporting

confidence: 90%

“…The results of genetic correlations were similar to those observed in previously published studies in dairy cattle (Berry et al, 2004;Bohlouli et al, 2015). Bohlouli et al (2015) reported genetic correlations between rear leg rear view and foot angle of -0.67, and between rear leg rear view and rear leg side view of -0.11. The greatest absolute value has been reported by Berry et al (2004), who obtained a genetic correlation of -0.88 between leg position and hoof angle.…”

Section: Resultssupporting

confidence: 90%

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Genetic analysis of feet and leg conformation traits in Nelore cattle

Vargas¹,

Neves²,

Cardoso³

et al. 2017

Journal of Animal Science

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Feet and leg conformation scores are important traits in beef cattle because they encompass a wide range of locomotion disorders that can lead to productive and reproductive losses. Thus, the study of feet and legs in beef cattle is essential for evaluating possible responses to selection focusing on minimizing economic losses caused by the occurrence of feet and leg problems. The aim of this study was to estimate variance components for feet and leg conformation traits in Nelore cattle. The data set contained records of approximately 300,000 animals that were born between 2000 and 2013. These animals belonged to the commercial beef cattle breeding program of the CRV Lagoa (). Feet and legs were evaluated by assigning visual scores at 2 different time points: feet and leg evaluated as a binary trait (FL1), measured at yearling (about 550 d of age) to identify whether (or not) an animal has feet and leg defects, and feet and leg score (FL2), ranging from 1 (less desirable) to 5 (more desirable) was assigned to the top 20% of animals according to the selection index adopted by the beef cattle breeding program, which was measured 2 to 5 mo after the yearling evaluation. The FL1 and FL2 traits were analyzed together with yearling weight (YW). The (co)variance components and breeding values were estimated by Bayesian inference using 2-trait animal models. The posterior means (standard errors) of the heritabilities for FL1, FL2, and YW were 0.18 (0.04), 0.39 (0.07), and 0.47 (0.01), respectively. The results indicate that the incidence of feet and leg problems in this population might be reduced by selection. The genetic correlation between FL1 and FL2 (-0.47) was moderate and negative as expected because the classification score that holds up each trait has opposite numerical values. The genetic trends estimated for FL1 and FL2 (-0.042 and 0.021 genetic standard deviations per year, respectively) were favorable and they indicate that the independent culling strategy for feet and leg problems promotes favorable changes and contributes to the genetic progress of these traits in the population under study.

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Section: Resultssupporting

confidence: 90%

Section: Resultssupporting

confidence: 90%

Genetic analysis of feet and leg conformation traits in Nelore cattle

Vargas¹,

Neves²,

Cardoso³

et al. 2017

Journal of Animal Science

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“…Most udder traits had low heritabilities except for teat length (0.36). The heritability values of most udder traits were similar to previously published studies (Mrode and Swanson, 1994;Veerkamp and Brotherstone 1997;Vollema and Groen, 1997;Toghiani, 2011;Bohlouli et al, 2015;Viegas et al, 2015;Prestes et al, 2017).…”

Section: Resultssupporting

confidence: 88%

Türkiye’de Yetiştirilen Siyah Alaca İneklerin Doğrusal Tip Özellikleri, Birinci Laktasyon Karlılığı ve Verim Özellikleri Arasındaki Genotopik Korelasyonlar

Tapkı¹,

Nuran²,

Güzey³

et al. 2020

Hayvansal Üretim

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Objective: The aim of this study is to determine genetic correlations between linear type traits, yield characteristics and first lactation profitability for use in selection programs. Material and Methods: The research was carried out in Hatay province between 2012-2017. A total of 810 cows in the first lactation were used in the study. Analysis of variance and covariances of genetic parameters was carried out with Multivariate Limited Maximum Likelihood test. Results: The average first lactation net profit, 305-d milk yield, first calving age, conception rate at first service, and calving ease rate were determined as 540 US$, 6008 kg, 793 d, 61.6%, and 91.7%, respectively. Heritabilities of linear type and production traits ranged from 0.10 to 0.42 and 0.04 to 0.39, respectively. The genetic correlations between first lactation profitability and type traits ranged from -0.08 and 0.42, while between first lactation profitability and production traits ranged from 0.06 and 0.34. The highest genetic correlation was between first lactation profitability and central ligament (0.42), while the lowest genetic correlation was between first lactation profitability and udder depth (-0.08). The highest genetic correlation was between first lactation profitability and lactation protein yield (0.34), while the lowest genetic correlation was between first lactation profitability and conception rate at first service (0.09). Genetic correlations between type and production traits varied from -0.42 (FA and CFS) to 0.49 . Conclusion: These results showed that primiparous cows having more angular, strong fore udder attachments, strong foot and legs structure were more profitable and opportunities of selection programs by using genetic correlations between linear type traits and production characteristics. It also concluded that the first lactation profitability could be used successfully in Turkish dairy cattle breeding programs. ÖZAmaç: Bu çalışmanın amacı, ıslah programlarında kullanılmak üzere doğrusal tip özellikleri, verim özellikleri ve birinci laktasyon karlılığı arasındaki genetik korelasyonların tespitini yapmaktır. Materyal ve Metot: Araştırma 2012-2017 yılları arasında Hatay ilinde yürütülmüştür. Araştırmada toplam 810 baş birinci laktasyonda olan inek kullanılmıştır. Genetik parametrelerinin varyans ve kovaryanslarının analizi ise Multivariate Limited Maximum Likelihood testi ile gerçekleştirilmiştir. Bulgular: Ortalama inek başına birinci laktasyon net kar, 305-gün süt verimi, ilk buzağılama yaşı, ilk tohumlamada gebe kalma oranı ve kolay doğum oranı 540 US$, 6008 kg, 793 gün, %61.6 ve %91.7 olarak belirlenmiştir. Doğrusal tip özellikleri ile verim özelliklerinin kalıtım dereceleri sırasıyla; 0.10-0.42 ve 0.04-0.39 arasında tahmin edilmiştir. Birinci laktasyon karlılığı ile doğrusal tip özellikleri arasındaki genetik korelasyonlar -0.08 ve 0.42 arasında, birinci laktasyon karlılığı ile verim özellikleri arasındaki korelasyonlar 0.06 ve 0.34. arasında tahmin edilmiştir. Birinci laktasyon karlılığı ile en yüksek korelas...

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“…Está compuesta por agua, grasa, proteína, lactosa y minerales (Walstra, Wouters, & Geurts, 2006). Estos componentes varían según el patrón racial de los animales (DePeters, Medrano, & Reed, 1995), las condiciones climáticas en donde se desarrolla el sistema de producción (WingChing-Jones & Mora-Chaves, 2015), el estado sanitario de la ubre (Alhussien & Dang, 2018), el número de lactancia (Bohlouli, Alijani, & Varposhti, 2015), el contenido de almidones (Gao & Oba, 2016), el balance catión anión (Iwaniuk & Erdman, 2015) y el contenido de proteína en la dieta (Sinclair, Garnsworthy, Mann, & Sinclair, 2014); la edad del animal (Bohlouli et al, 2015), el estado de lactancia (Bohlouli et al, 2015) y los litros producidos al día (Feltes et al, 2016) entre otras variables.…”

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Efecto de agregar agua sobre el punto crioscópico y componentes de la leche cruda de vacas Jersey y Holstein

WingChing-Jones

Chaves²

2019

URJ

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Effect of water addition on freezing point and components of raw milk from Jersey and Holstein cows". Introduction: The freezing point is used to assess the quality of raw whole milk and its byproducts. Objective: To determine the effect of water addition on freezing point, bromatological composition, urea content, somatic cell content and bacterial content in raw milk. Methods: During the first stage, we took 35 samples of milk (80mL) from the towns of Turrialba in Cartago, and Zarcero in Alajuela (April and October 2018). We added water (5, 10, 15, 20, 25, and 30% w/w) and kept an unadulterated sample as control (five repetitions each). Results: The addition of 5% water (w/w) was enough to alter all parameters. On a second stage, we tested lower concentrations (1, 2, 3, 4, and 5% w/w). Conclusion: The addition of 1% water (w/w) produced significant changes only on three parameters: freezing point, bromatological contents, and somatic cell count.

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Genetic Relationships Among Linear Type Traits and Milk Production Traits of Holstein Dairy Cattle

Cited by 31 publications

References 35 publications

Genetic analysis of feet and leg conformation traits in Nelore cattle

Genetic analysis of feet and leg conformation traits in Nelore cattle

Türkiye’de Yetiştirilen Siyah Alaca İneklerin Doğrusal Tip Özellikleri, Birinci Laktasyon Karlılığı ve Verim Özellikleri Arasındaki Genotopik Korelasyonlar

Efecto de agregar agua sobre el punto crioscópico y componentes de la leche cruda de vacas Jersey y Holstein

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