Effects of cytoplasmic inheritance on preweaning traits of Hereford cattle

Mezzadra, C. A.; Melucci, L. M.; Corva, P. M.; Valiente, Sebastián López; Ripoli, María Verónica; Lirón, Pedro; Giovambattista, Guillermo

doi:10.1590/s1415-47572005000300003

Cited by 7 publications

(7 citation statements)

References 24 publications

(33 reference statements)

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“…Moreover, the influence of the l effect on BrW may be null. This is consistent with earlier reports on this issue in beef cattle (Gibson et al, 1997;Mezzadra et al, 2005;Rohrer et al, 1994;Tess and MacNeil, 1994;Tess et al, 1987). The low effect assessed for cytoplasmic line may be partially due to its maternal inheritance.…”

Section: Discussionsupporting

confidence: 92%

Cytoplasmic line effects for birth weight and preweaning growth traits in the Asturiana de los Valles beef cattle breed

2012

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A total of 15,645 records of birth weight (BrW), weaning weight (WW) and average daily gain (ADG) from 6055 cows belonging to 2121 different dam lines were analyzed to quantify the contribution of cytoplasmic line (l) effects to phenotypic variance of preweaning growth traits in a sample of Asturiana de los Valles beef cattle breed. Only dam lines with 2 or more cows having performance records in the database were used. Bayesian estimates were obtained fitting eight different univariate and multivariate models defined depending on the inclusion or not of the permanent maternal environment (c) and the l effects. Univariate models that included both the c and the l effects had the best fit with data (assessed by computing the logarithm of the conditional predictive ordinate; logCPO) for BrW and ADG while for WW this was the case for the model that only included the c effect. For multivariate models, the best fit with data was obtained for the model that only included the c effect (logCPO = − 245,899) while the second "better" model was that which only include the l effect value (logCPO = − 241,108). In general, whatever the estimation model used, estimates of heritability for the direct (h 2 ) and maternal (m 2 ) genetic effects and the genetic correlation between them (r am ) obtained in the current study for BrW were slightly higher (r am more negative) than the most recent estimates reported in the breed. However, this is not true for WW and ADG when multivariate estimation models include the l effect. In these cases, estimates of h 2 and m 2 for WW and ADG tend to be lower and r am less negative than those previously estimated. In conclusion, the cytoplasmic line may have a marginal effect on growth performance in beef cattle but not sufficient in magnitude to justify including the l effect in models in beef improvement schemes.

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Section: Discussionsupporting

confidence: 92%

Cytoplasmic line effects for birth weight and preweaning growth traits in the Asturiana de los Valles beef cattle breed

2012

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Section: Discussionmentioning

confidence: 99%

“…Mezzadra et al [12] examined the influence of cytoplasmic inheritance by a method of assigning maternal lines, in addition to analysing the direct association between mitochondrial DNA polymorphisms and productive traits. It was found that in 23 supposed maternal lineages there were only five different mitochondrial genotypes, and it was suggested that the failure to detect a cytoplasmic effect could be a reflection of some maternal lines having the same genotype.…”

Section: Discussionmentioning

confidence: 99%

Exploration of cytoplasmic inheritance as a contributor to maternal effects in Welsh Mountain sheep

2008

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-Cytoplasmic effects were investigated using a dataset comprising three breeding groups of Welsh Mountain sheep. The influences of cytoplasmic effects were investigated by comparing animal models with and without a random term representing cytoplasmic effects. The models were applied to the eight-week weight, scan weight (mean 152 days) and ultrasonically scanned muscle and fat depth. The animal model included the random effects of animals and the maternal additive genetic, maternal permanent environmental and maternal common environmental effects. In total there were 24 569, 10 509, 8389, 8369 records for the eight-week weight, scan weight, muscle depth and fat depth respectively. Four subsets were further analysed containing maternal lines with at least five, ten, fifteen and twenty animals/line. There was no evidence of cytoplasmic effects on eight-week weight and muscle depth. Cytoplasmic effects contributed 1-2% of phenotypic variance for scan-weight and fat depth, but the effect was generally non-significant (P > 0.05). As the number of animals per maternal line increased, the magnitude of cytoplasmic effects also increased for these traits. Direct heritability estimates for the eight-week weight, scan weight, muscle depth and fat depth using the full dataset were 0.18, 0.25, 0.24, and 0.21 respectively. cytoplasmic inheritance / model / maternal effect / sheep

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“…Some authors have commented that analyses on small datasets from a limited number of populations may reduce the ability of tests to find significant differences between maternal lines [9,12,15,16]. Mezzadra et al [12] examined the influence of cytoplasmic inheritance by a method of assigning maternal lines, in addition to analysing the direct association between mitochondrial DNA polymorphisms and productive traits. It was found that in 23 supposed maternal lineages there were only five different mitochondrial genotypes, and it was suggested that the failure to detect a cytoplasmic effect could be a reflection of some maternal lines having the same genotype.…”

Section: Discussionmentioning

confidence: 99%

Exploration of cytoplasmic inheritance as a contributor to maternal effects in Welsh Mountain sheep

2008

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Abstract

Cytoplasmic effects were investigated using a dataset comprising three breeding groups of Welsh Mountain sheep. The influences of cytoplasmic effects were investigated by comparing animal models with and without a random term representing cytoplasmic effects. The models were applied to the eight-week weight, scan weight (mean 152 days) and ultrasonically scanned muscle and fat depth. The animal model included the random effects of animals and the maternal additive genetic, maternal permanent environmental and maternal common environmental effects. In total there were 24 569, 10 509, 8389, 8369 records for the eight-week weight, scan weight, muscle depth and fat depth respectively. Four subsets were further analysed containing maternal lines with at least five, ten, fifteen and twenty animals/line. There was no evidence of cytoplasmic effects on eight-week weight and muscle depth. Cytoplasmic effects contributed 1–2% of phenotypic variance for scan-weight and fat depth, but the effect was generally non-significant (P > 0.05). As the number of animals per maternal line increased, the magnitude of cytoplasmic effects also increased for these traits. Direct heritability estimates for the eight-week weight, scan weight, muscle depth and fat depth using the full dataset were 0.18, 0.25, 0.24, and 0.21 respectively.

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Effects of cytoplasmic inheritance on preweaning traits of Hereford cattle

Cited by 7 publications

References 24 publications

Cytoplasmic line effects for birth weight and preweaning growth traits in the Asturiana de los Valles beef cattle breed

Cytoplasmic line effects for birth weight and preweaning growth traits in the Asturiana de los Valles beef cattle breed

Exploration of cytoplasmic inheritance as a contributor to maternal effects in Welsh Mountain sheep

Exploration of cytoplasmic inheritance as a contributor to maternal effects in Welsh Mountain sheep

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