Genetic parameters from two different field testing schemes for beef traits of German Gelbvieh finishing bulls

Engellandt, Th.; Reinsch, Norbert; Schild, H. J.; Kalm, E.

doi:10.1016/s0301-6226(99)00095-0

Cited by 8 publications

(10 citation statements)

References 9 publications

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“…A detailed description of this data set, the testing scheme and estimates for genetic parameters from multivariate analyses of this set of data, can be found in E NGELLANDT et al. (1999).…”

Section: Methodsmentioning

confidence: 99%

“…The logarithm (ln) of kidney fat was used in this study as the residuals proved to be more normally distributed than in those of the untransformed trait analysed in the previous study. Table 1 contains means, standard deviations, heritabilities and genetic standard deviations of the traits analysed by E NGELLANDT et al. (1999) together with the means and standard deviations of the covariates.…”

Section: Methodsmentioning

confidence: 99%

“…The basic linear animal model for all traits in the data set, as described in E NGELLANDT et al. (1999), and also for a simulated trait was…”

Section: Methodsmentioning

confidence: 99%

“…This additional random effect was assumed to have a variance of I σ 2 c and be uncorrelated to all other random effects. A more detailed description of this method, used on similar data, is given in R EINSCH et al. (1999).…”

Section: Methodsmentioning

confidence: 99%

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Genetic variances due to imprinted genes in cattle

Engellandt

Tier

2002

J Animal Breeding Genetics

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The effect of paternally expressed, i.e. maternally imprinted, genes on slaughter records from 2744 German Gelbvieh finishing bulls were estimated. Significant effects of paternal gametes were found for two fatness traits and an estimate of meat content. Paternally expressed genes explained 14 and 16% of the phenotypic variances for pelvic fat and kidney fat, respectively. Ignoring paternal gametic effects resulted in inflated estimates of the additive genetic variances. The heritabilities of pelvic and kidney fat dropped from 0.31 to 0.16 and from 0.59 to 0.28, respectively, when paternal gametes were fitted. A 15% influence of paternally expressed genes and a reduction in heritability of 20% were also found for estimated meat content. Simulation studies demonstrated that the uncorrelated random effect of the sire is a useful indicator for the presence of paternal gametic effects in variance component estimations. The presented results correspond well with findings in swine, where a paternally expressed QTL at the Igf2 gene influences similar trait complexes. A viable speculation could therefore be that an imprinted bovine Igf2 gene caused the effects described here. Zusammenfassung Genetische Variation auf Grund von paternal exprimierten Genen beim RindIn der vorliegenden Studie wurde der Effekt von paternal exprimierten Genen auf Merkmale der Schlachtleistung und des Schlachtkö rperwertes von 2744 Mastbullen der Rasse Gelbvieh geschätzt. Signifikante Effekte von paternal exprimierten Genen wurden fü r zwei Fettabschnitte des Schlachtkö rpers und fü r den geschätzten Fleischanteil gefunden, sie erklärten 14% und 16% der phänotypischen Varianzen des Becken-und Nierenfettes. Das Nichtbeachten dieser Effekte im linearen Schätzmodell fü hrte zu einer Ü berschätzung der additiv genetischen Varianzen in den jeweiligen Merkmalen. Wurden die Effekte der paternalen Gameten im Schätzmodell berü cksichtigt, fielen die geschätzten Heritabilitäten des Becken-und Nierenfettes von h 2 ¼ 0,31 auf h 2 ¼ 0,16 bzw. von h 2 ¼ 0,59 auf h 2 ¼ 0,28. Der Einfluß der paternalen Gameten auf die phänotypische Varianz des geschätzten Fleischanteils des Schlachkö rpers wurde auf 15% geschätzt. Bei Berü cksichtigung dieser Effekte im linearen Schätzmodell fiel die Heritabilität des Merkmals Fleischanteil um 20%. In Simulationsstudien konnte gezeigt werden, daß der unkorrelierte, zufällige Effekt des Vaters ein nü tzlicher Indikator fü r eventuell vorhandene paternal gametische Effekte bei der Schätzung von Varianzkomponenten sein kann. Die gefundenen Ergebnisse weisen Parallelen zu Untersuchungen beim Schwein auf, wo ein paternal exprimierter QTL am Igf2 Locus ähnliche Merkmalskomplexe beeinflußt. Eine mö gliche Spekulation kö nnte daher sein, daß die hier beschriebenen Effekte beim Rind durch einen Igf2 Locus verursacht werden, der dem Phänomen des Imprinting unterliegt.

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“…A detailed description of this data set, the testing scheme and estimates for genetic parameters from multivariate analyses of this set of data, can be found in E NGELLANDT et al. (1999).…”

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

“…The basic linear animal model for all traits in the data set, as described in E NGELLANDT et al. (1999), and also for a simulated trait was…”

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Genetic variances due to imprinted genes in cattle

Engellandt

Tier

2002

J Animal Breeding Genetics

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“…Reviews of the literature (Koots et al, 1994b;Rios Utrera and Van Vleck, 2004) show that large differences in estimates of heritability for beef traits can depend upon the breed present in the analyzed data. Hirooka et al (1996), Van der Werf et al (1998), and Engellandt et al (1999) show large differences in the estimates of genetic (co)variances for carcass traits between different breeds.…”

Section: Introductionmentioning

confidence: 99%

Genetic parameters for EUROP carcass traits within different groups of cattle in Ireland1

Hickey

Keane

Kenny

et al. 2007

Journal of Animal Science

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The first objective of this study was to test the ability of systems of weighing and classifying bovine carcasses used in commercial abattoirs in Ireland to provide information that can be used for the purposes of genetic evaluation of carcass weight, carcass fatness class, and carcass conformation class. Secondly, the study aimed to test whether genetic and phenotypic variances differed by breed of sire. Variance components for carcass traits were estimated for crosses between dairy cows and 8 breeds of sire commonly found in the Irish cattle population. These 8 breeds were Aberdeen Angus, Belgian Blue, Charolais, Friesian, Hereford, Holstein, Limousin, and Simmental. A multivariate animal model was used to estimate genetic parameters within the Holstein sire breed group. Univariate analyses were used to estimate variance components for the remaining 7 sire breed groups. Multivariate sire models were used to formally test differences in genetic variances in sire breed groups. Field data on 64,443 animals, which were slaughtered in commercial abattoirs between the ages of 300 and 875 d, were analyzed in 8 analyses. Carcass fat class and carcass conformation class were measured using the European Union beef carcass classification system (EUROP) scale. For all 3 traits, the sire breed group with the greatest genetic variance had a value of more than 8 times the sire breed group with least genetic variance. Heritabilities ranged from zero to moderate for carcass fatness class (0.00 to 0.40), from low to moderate for carcass conformation class (0.04 to 0.36), and from low to high for carcass weight (0.06 to 0.65). Carcass weight was the most heritable (0.26) of the 3 traits. Carcass conformation class and carcass fatness class were equally heritable (0.17). Genetic and phenotypic correlations were all positive in the Holstein sire breed group. The genetic correlations varied from 0.11 for the relationship between carcass weight and carcass fatness class to 0.44 for the relationship between carcass conformation class and carcass fatness class. Carcass weight and classification data collected in Irish abattoirs are useful for the purposes of genetic evaluation for beef traits of Irish cattle. There were significantly different variance components across the sire breed groups.

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A new model for parent-of-origin effect analyses applied to Brown Swiss cattle slaughterhouse data

Blunk

Mayer

Hamann³

et al. 2017

Animal

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Genomic imprinting is a phenomenon that arises when the expression of genes depends on the parental origin of alleles. Epigenetic mechanisms may induce the full or partial suppression of maternal or paternal alleles, thereby leading to different types of imprinting. However, imprinting effects have received little consideration in animal breeding programmes, although their relevance to some agricultural important traits has been demonstrated. A recently proposed model (imprinting model) with two path-of-transmission (male and female)-specific breeding values for each animal accounts for all types of imprinting simultaneously (paternal, maternal, full and partial). Imprinting effects (or more generally: parent-of-origin effects (POE)) are determined by taking the difference between the two genetic effects in each animal. However, the computation of their prediction error variance (PEV) is laborious; thus, we propose a new model that is equivalent to the aforementioned imprinting model, which facilitates the direct estimation of imprinting effects instead of taking the differences and the PEV is readily obtained. We applied the new model to slaughterhouse data for Brown Swiss cattle, among which imprinting has never been investigated previously. Data were available for up to 173 051 fattening bulls, where the pedigrees contained up to 428 710 animals representing the entire Brown Swiss population of Austria and Germany. The traits analysed comprised the net BW gain, fat score, EUROP class and killing out percentage. The analysis demonstrated that the net BW gain, fat score and EUROP class were influenced significantly by POE. After estimating the POE, the new model yielded estimates with reliabilities ranging between 0.4 and 0.9. On average, the imprinting variances accounted for 9.6% of the total genetic variance, where the maternal gamete was the main contributor. Moreover, our results agreed well with those obtained using linear models when the EUROP class and fat score were treated as categorical traits by applying a GLMM with a logit link function.

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Genetic parameters from two different field testing schemes for beef traits of German Gelbvieh finishing bulls

Cited by 8 publications

References 9 publications

Genetic variances due to imprinted genes in cattle

Genetic variances due to imprinted genes in cattle

Genetic parameters for EUROP carcass traits within different groups of cattle in Ireland1

A new model for parent-of-origin effect analyses applied to Brown Swiss cattle slaughterhouse data

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