Estimation of Direct and Service Sire Genetic Parameters for Reproductive Traits in Yorkshire

Kim, B. W.; Kim, S. D.; Lee, I. J.; Chung, K. H.; Kwon, Oh Sub; Ha, J. K.; Lee, J. G.

doi:10.5713/ajas.2002.1232

Cited by 7 publications

(4 citation statements)

References 15 publications

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“…For MORT, service sire effects were not large sources of variation (0.1% to 0.7%). The results in this study for TNB and NBA are in agreement with the estimates reported by Lewis et al [ 17 ] and Kim et al [ 7 ]. The proportion of service sire effect on the total variability reported by Guo et al [ 10 ] for MORT are in the range of the results found in this study; however, they found higher effects of TNB and NBA than were observed in the present study.…”

Section: Resultssupporting

confidence: 93%

Variance components estimation for farrowing traits of three purebred pigs in Korea

Lopez

Kim

Makumbe

et al. 2017

Asian-Australas J Anim Sci

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ObjectiveThis study was conducted to estimate breed-specific variance components for total number born (TNB), number born alive (NBA) and mortality rate from birth through weaning including stillbirths (MORT) of three main swine breeds in Korea. In addition, the importance of including maternal genetic and service sire effects in estimation models was evaluated.MethodsRecords of farrowing traits from 6,412 Duroc, 18,020 Landrace, and 54,254 Yorkshire sows collected from January 2001 to September 2016 from different farms in Korea were used in the analysis. Animal models and the restricted maximum likelihood method were used to estimate variances in animal genetic, permanent environmental, maternal genetic, service sire and residuals.ResultsThe heritability estimates ranged from 0.072 to 0.102, 0.090 to 0.099, and 0.109 to 0.121 for TNB; 0.087 to 0.110, 0.088 to 0.100, and 0.099 to 0.107 for NBA; and 0.027 to 0.031, 0.050 to 0.053, and 0.073 to 0.081 for MORT in the Duroc, Landrace and Yorkshire breeds, respectively. The proportion of the total variation due to permanent environmental effects, maternal genetic effects, and service sire effects ranged from 0.042 to 0.088, 0.001 to 0.031, and 0.001 to 0.021, respectively. Spearman rank correlations among models ranged from 0.98 to 0.99, demonstrating that the maternal genetic and service sire effects have small effects on the precision of the breeding value.ConclusionModels that include additive genetic and permanent environmental effects are suitable for farrowing traits in Duroc, Landrace, and Yorkshire populations in Korea. This breed-specific variance components estimates for litter traits can be utilized for pig improvement programs in Korea.

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Section: Resultssupporting

confidence: 93%

Variance components estimation for farrowing traits of three purebred pigs in Korea

Lopez

Kim

Makumbe

et al. 2017

Asian-Australas J Anim Sci

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“…High estimates between 0.30 and nearly 0.50 for the heritability of mean birth weight were published in a number of papers (Högberg and Rydhmer, 2000;Ruíz-Flores and Johnson, 2001;Hermesch et al, 2001;Kim et al, 2002;Täubert and Henne, 2003;Damgaard et al, 2003;Huby et al, 2003). A litter size trait as total number born or number born alive was used as covariable in the statistical model which explains the high values of the estimates.…”

Section: Estimates Of Genetic Parametersmentioning

confidence: 93%

Within-litter variation of birth weight in hyperprolific Czech Large White sows and its relation to litter size traits, stillborn piglets and losses until weaning

Wolf

Žáková

Groeneveld³

2008

Livestock Science

143

140

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“…A joint covariance matrix for the additive genetic effects and the service sire effects was assumed as done by Kim et al (2002):…”

Section: Statistical Analysesmentioning

confidence: 99%

Effect of service sire on litter size traits in Czech Large White and Landrace pigs

Wolf¹,

Wolfová²

2012

CZECH J ANIM SCI

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Litter size traits generally are lowly heritable (Hanenberg et al., 2001;Wolf et al., 2002;Chen et al., 2003). Therefore, using additional information in genetic evaluations may be beneficial for increasing the precision of predicted breeding values. A potential source of information is the effect of service sire. According to van der Lende et al. (1999), service sire can influence both fertilization rate and prenatal survival rate. Such an effect could be due to genetically determined differences in fertilizing capacity (sperm quality) and the genetic contribution of the sire to the viability of the embryo. Although the proportion of variance for litter size traits in pigs attributable to service sire has ranged from 0.00 to 0.05 (Chen et al., 2003;Hamann et al., 2004;Köck et al., 2009), most authors recommend inclusion of the service sire effect in the animal models for genetic evaluation.Until recently, the service sire effect has not been included in the model equations for genetic evaluation of number of piglets born alive in Czech dam breeds (Wolf et al., 2005), and no information on this effect has been available for those breeds. Therefore, the objective of the present study was to quantify the service sire effect in terms of (co) variance components and to propose models for the potential inclusion of this effect in the linear equations for breeding value estimation. Two additional litter size traits (number of piglets born and number of piglets weaned) were also included in the investigation, because very little information is available on the service sire effect on these traits. MATERIAL AND METHODS DataLitter size data were available from Czech Large White and Czech Landrace sows farrowing be- The proportion of variance for service sire effect was estimated for three litter size traits (numbers of piglets born, born alive, and weaned) in Czech Large White (89 231 litters) and Czech Landrace (28 320 litters) pigs. Each trait in the first parity was considered as one trait and that trait in the second and subsequent parities was treated as a repeated trait. Consequently, three two-trait animal models were evaluated for each litter size trait: (i) the service sire effect was included and the complete relationship matrix for all the animals (service sires and sows) was taken into account; (ii) the service sire effect was included as a random effect without inclusion of the relationship matrix; (iii) the service sire effect was omitted from the model. Using the residual variance as a criterion, both models including the service sire effect were slightly better than the model without this effect. Estimates of genetic parameters were very similar for the two models including the service sire effect. The proportion of variance for service sire was in the range from 2 to 3% (standard error approx. 0.2%) in Czech Large White and 2% (standard error approx. 0.3%) in Czech Landrace for all three litter size traits and all models. Models without service sire effect or models including service sire as a simple rand...

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Estimation of Direct and Service Sire Genetic Parameters for Reproductive Traits in Yorkshire

Cited by 7 publications

References 15 publications

Variance components estimation for farrowing traits of three purebred pigs in Korea

Variance components estimation for farrowing traits of three purebred pigs in Korea

Within-litter variation of birth weight in hyperprolific Czech Large White sows and its relation to litter size traits, stillborn piglets and losses until weaning

Effect of service sire on litter size traits in Czech Large White and Landrace pigs

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