Genetic relationship between milk urea nitrogen and reproductive performance in Holstein dairy cows

Hossein-Zadeh, Navid Ghavi; Ardalan, M.

doi:10.1017/s1751731110001606

Cited by 14 publications

(11 citation statements)

References 38 publications

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“…In general, the averages of DO and CI were within the range of values reported in some studies (GonzalezRecio and Alenda, 2005;Zink et al, 2011), the average of DFS in the current study was greater than corresponding averages reported by other researchers (Andersen-Ranberg et al, 2005;Sun et al, 2010;Ghavi Hossein-Zadeh and Ardalan, 2010;Zink et al, 2011). The univariate estimates of CE heritability were slightly greater than those reported by Alday and Ugarte (1997) and Lee et al (2003) in Holsteins, and were similar to estimates reported by Niskanen and Juga (2003) in Ayrshire dairy cows for direct heritability, and smaller than those reported by Abdullahpour et al (2006) and Eghbalsaied et al (2012) in Holsteins, Carnier et al (2000) and Albera et al (2004) Gredler et al (2007) for DO and CI, and by Koeck et al (2010) in Austrian Fleckvieh (Simmental) dual-purpose cattle for DFS.…”

Section: Discussionsupporting

confidence: 82%

“…The Interbull guidelines (Interbull, 2001) stated that an animal model is better than a sire model and a multiple-trait model is better than a single-trait model. Genetic parameters have been estimated for dystocia (Abdullahpour et al, 2006;Eghbalsaied et al, 2012), productive (Ghavi Hossein-Zadeh, 2011) and reproductive traits (Toghiani-Pozveh, 2009;Ghavi Hossein-Zadeh and Ardalan, 2010;Ghavi Hossein-Zadeh, 2011;Ghiasi et al, 2011) in Iranian Holstein cows. Nevertheless, the estimates of genetic correlations between dystocia and performance traits were scarce in the literature.…”

Section: Introductionmentioning

confidence: 99%

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Genetic evaluation of dystocia and its relationship with productive and reproductive traits in Holstein cows

Salimi

Hossein-Zadeh

Shadparvar

et al. 2017

Rev Colomb Cienc Pecu

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Evaluación genética de distocia y su relación con las características productivas y reproductivas en vacas HolsteinAvaliação genética de distocia e sua relação com características produtivas e reprodutivas em vacas da raça Holandesa Abstract:Background: dystocia is one of the most economically significant secondary traits in dairy cows and has adverse effects on the subsequent survival, health, and performance of mothers and offspring. Objective: the aim of this study was to estimate direct and maternal genetic parameters for calving ease (CE) and its relationship with productive and reproductive traits in Iranian Holstein cows. Methods: data from 1991 through 2011 were collected from the Animal Breeding Center of Iran, and contained 132,831 records of CE, 183,203 records of productive traits including 305-d adjusted milk yield (MY305), 305-d adjusted fat yield (FY305) and 305-d adjusted protein yield (PY305), and 129,199 records of reproductive traits including days open (DO), days to first service (DFS) and calving interval (CI). Univariate and bivariate linear animal models were used for the analysis of traits in two different models on which direct genetic effect (model 1) and direct + maternal genetic effects (model 2) using AI-REML algorithm were included. Results: estimated heritabilities for CE in model 1 were 0.02 in univariate and 0.02-0.03 in bivariate analyses. Direct and maternal heritabilities in model 2 were 0.02 and 0.002 for univariate, and 0.03 and 0.0004-0.006 in bivariate analyses, respectively. Genetic correlations between direct effects of CE with MY305, FY305, and PY305 were -0.99, 0.02 and -0.07 in model 1, and -0.2, -0.02 and -0.13 in model 2, respectively. Conclusion: this study suggested that a selection index that includes both direct and maternal effects should be included in CE breeding programs.

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Section: Discussionsupporting

confidence: 82%

Section: Introductionmentioning

confidence: 99%

Genetic evaluation of dystocia and its relationship with productive and reproductive traits in Holstein cows

Salimi

Hossein-Zadeh

Shadparvar

et al. 2017

Rev Colomb Cienc Pecu

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“…Average CI, DFS and DO were 403.69, 98.83 and 128.72 days respectively. The average of DO in the current study was lower than the results of the previous studies (Ghavi Hossein‐Zadeh, ; Ghavi Hossein‐Zadeh and Ardalan, ). Also, Ghavi Hossein‐Zadeh () reported greater interval from first to second calving (414 days) in Iranian Holsteins.…”

Section: Resultscontrasting

confidence: 93%

“…Also, Ghavi Hossein‐Zadeh () reported greater interval from first to second calving (414 days) in Iranian Holsteins. Average DFS reported in this study was generally greater than the reports of Ghavi Hossein‐Zadeh and Ardalan () and Mitchell et al. ().…”

Section: Resultscontrasting

confidence: 74%

Effect of dystocia on subsequent reproductive performance and functional longevity in Holstein cows

Hossein-Zadeh

2016

Animal Physiology Nutrition

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The objective of this study was to evaluate the effect of dystocia on the reproductive performance and functional longevity in Iranian Holsteins. Data consisted of 1 467 064 lactation records of 581 421 Holstein cows from 3083 herds which were collected by the Animal Breeding Center of Iran from April 1987 to February 2014. Reproduction traits in this study included interval from first to second calving, days open and days from first calving to first service. The generalized linear model was used for the statistical analysis of reproductive traits. Survival analysis was performed using the Weibull proportional hazards models to analyse the impact of dystocia on functional longevity. The incidence of dystocia had an adverse effect on the reproductive performance of dairy cows. Therefore, reproductive traits deteriorated along with increase in dystocia score (p < 0.05). The culling risk was increased along with increase in the score of dystocia (p < 0.0001). The greatest culling risk was observed in primiparous cows, small herds and low-yielding cows (p < 0.0001). Also, the lowest culling risk was found for cows calving at the youngest age (<27 months), and cows with age at first calving >33 months had the greatest risk (p < 0.0001). The results of current study indicated that dystocia had important negative effects on the reproductive performance and functional longevity in dairy cows, and it should be avoided as much as possible to provide a good perspective in the scope of economic and animal welfare issues in dairy herds.

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“…Therefore, the use of correlated traits may be beneficial for the selection process. Genetic relationships of MUN with fitness traits, such as reproductive performance and health, have been under investigation (Mitchell et al 2005 ; König et al 2008 ; Hossein-Zadeh and Ardalan 2011b ; Mucha and Strandberg 2011 ). The estimation of genetic correlations with diseases is currently not possible, as this kind of data is not recorded in Poland.…”

Section: Introductionmentioning

confidence: 99%

Genetic parameters for milk urea concentration and milk traits in Polish Holstein-Friesian cows

Rzewuska

Strabel

2013

J Appl Genetics

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Milk urea concentration (MU) used by dairy producers for management purposes can be affected by selection for milk traits. To assess this problem, genetic parameters for MU in Polish Holstein-Friesian cattle were estimated for the first three lactations. The genetic correlation of MU with milk production traits, lactose percentage, fat to protein ratio (FPR) and somatic cell score (SCS) were computed with two 5-trait random regression test-day models, separately for each lactation. Data used for estimation (159,044 daily observations) came from 50 randomly sampled herds. (Co)variance components were estimated with the Bayesian Gibbs sampling method. The coefficient of variation for MU in all three parities was high (40–41 %). Average daily heritabilities of MU were 0.22 for the first parity and 0.21 for the second and third lactations. Average genetic correlations for different days in milk in the first three lactations between MU and other traits varied. They were small and negative for protein percentage (from −0.24 to −0.11) and for SCS (from −0.14 to −0.09). The weakest genetic correlation between MU and fat percentage, and between MU and lactose percentage were observed (from −0.10 to 0.10). Negative average genetic correlation with the fat to protein ratio was observed only in the first lactation (−0.14). Genetic correlations with yield traits were positive and ranged from low to moderate for protein (from 0.09 to 0.33), fat (from 0.16 to 0.35) and milk yield (from 0.20 to 0.42). These results suggest that the selection on yield traits and SCS tends to increase MU slightly.

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Genetic relationship between milk urea nitrogen and reproductive performance in Holstein dairy cows

Cited by 14 publications

References 38 publications

Genetic evaluation of dystocia and its relationship with productive and reproductive traits in Holstein cows

Genetic evaluation of dystocia and its relationship with productive and reproductive traits in Holstein cows

Effect of dystocia on subsequent reproductive performance and functional longevity in Holstein cows

Genetic parameters for milk urea concentration and milk traits in Polish Holstein-Friesian cows

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