The genetic relationships between conformation assessment of gilts and sow production and longevity

Aasmundstad, T.; Olsen, Dan R.; Sehested, E.; Vangen, O.

doi:10.1016/j.livsci.2014.05.004

Cited by 19 publications

(41 citation statements)

References 25 publications

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“…() (0.21–0.31) and T. Aasmundstad et al . () (0.13–0.19) and slightly higher than findings in studies of de Sevilla et al . () (0.05–0.07) and López‐Serrano et al .…”

Section: Discussioncontrasting

confidence: 53%

“…In the same study, Aasmundstad et al . also showed that the correlations between front leg and STAY12 became slightly significant and favourable if breeding value at removal was included in the model as covariate for longevity traits. Engblom et al .…”

Section: Discussionmentioning

confidence: 91%

“…; Aasmundstad et al . ,b). In general, the estimates available in the literature vary, which might be due to many factors: for example, the definition of the traits, the subjectivity of the technicians, the condition of the testing pens or that movement might be influenced by the state of mind of the pig – if it happens to be nervous, stressed or relaxed.…”

Section: Discussionmentioning

confidence: 99%

“…() and Aasmundstad et al . () reported insignificant genetic associations between exterior traits (leg status included) and longevity traits. In the same study, Aasmundstad et al .…”

Section: Discussionmentioning

confidence: 99%

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Genetic association between leg conformation in young pigs and sow longevity

Madsen

Lundeheim

et al. 2015

J Animal Breeding Genetics

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Longevity is important in pig production with respect to both economic and ethical aspects. Direct selection for longevity might be ineffective because 'true' longevity can only be recorded when a sow has been culled or died. Thus, indirect selection for longevity using information from other traits that can be recorded early in life and are genetically correlated with longevity might be an alternative. Leg conformation has been included in many breeding schemes for a number of years. However, proving that leg conformation traits are good early indicators for longevity still remains. Our aim was to study genetic associations between leg conformation traits of young (5 months; 100 kg) Swedish Yorkshire pigs in nucleus herds and longevity traits of sows in nucleus and multiplier herds. Data included 97 533 animals with information on conformation (Movement and Overall score) recorded at performance testing and 26 962 sows with information on longevity. The longevity traits were as follows: stayability from 1st to 2nd parity, lifetime number of litters and lifetime number of born alive piglets. Genetic analyses were performed with both linear models using REML and linear-threshold models using Bayesian methods. Heritabilities estimated using the Bayesian method were higher than those estimated using REML, ranging from 0.10 to 0.24 and 0.07 to 0.20, respectively. All estimated genetic correlations between conformation and longevity traits were significant and favourable. Heritabilities and genetic correlations between conformation and longevity indicate that selection on leg conformation should improve sow longevity.

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“…() (0.21–0.31) and T. Aasmundstad et al . () (0.13–0.19) and slightly higher than findings in studies of de Sevilla et al . () (0.05–0.07) and López‐Serrano et al .…”

Section: Discussioncontrasting

confidence: 53%

Section: Discussionmentioning

confidence: 91%

Section: Discussionmentioning

confidence: 99%

“…() and Aasmundstad et al . () reported insignificant genetic associations between exterior traits (leg status included) and longevity traits. In the same study, Aasmundstad et al .…”

Section: Discussionmentioning

confidence: 99%

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Genetic association between leg conformation in young pigs and sow longevity

Madsen

Lundeheim

et al. 2015

J Animal Breeding Genetics

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“…The evaluation of conformation traits has often been carried out subjectively by scoring gait and movement, leg and feet visual observations, and knee and pastern postures [5, 7]. In the literature, heritability estimates for leg conformation traits range from 0.01 to 0.37 [7–10]. These low to moderate heritabilities suggest that faster genetic progress could be achieved by incorporating genetic marker information in the selection process rather than using a traditional pedigree-based selection scheme [11].…”

Section: Introductionmentioning

confidence: 99%

Genome-wide association study for conformation traits in three Danish pig breeds

Christensen

Nielsen

et al. 2017

Genet Sel Evol

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BackgroundSelection for sound conformation has been widely used as a primary approach to reduce lameness and leg weakness in pigs. Identification of genomic regions that affect conformation traits would help to improve selection accuracy for these lowly to moderately heritable traits. Our objective was to identify genetic factors that underlie leg and back conformation traits in three Danish pig breeds by performing a genome-wide association study followed by meta-analyses.MethodsData on four conformation traits (front leg, back, hind leg and overall conformation) for three Danish pig breeds (23,898 Landrace, 24,130 Yorkshire and 16,524 Duroc pigs) were used for association analyses. Estimated effects of single nucleotide polymorphisms (SNPs) from single-trait association analyses were combined in two meta-analyses: (1) a within-breed meta-analysis for multiple traits to examine if there are pleiotropic genetic variants within a breed; and (2) an across-breed meta-analysis for a single trait to examine if the same quantitative trait loci (QTL) segregate across breeds. SNP annotation was implemented through Sus scrofa Build 10.2 on Ensembl to search for candidate genes.ResultsAmong the 14, 12 and 13 QTL that were detected in the single-trait association analyses for the three breeds, the most significant SNPs explained 2, 2.3 and 11.4% of genetic variance for back quality in Landrace, overall conformation in Yorkshire and back quality in Duroc, respectively. Several candidate genes for these QTL were also identified, i.e. LRPPRC, WRAP73, VRTN and PPARD likely control conformation traits through the regulation of bone and muscle development, and IGF2BP2, GH1, CCND2 and MSH2 can have an influence through growth-related processes. Meta-analyses not only confirmed many significant SNPs from single-trait analyses with higher significance levels, but also detected several additional associated SNPs and suggested QTL with possible pleiotropic effects.ConclusionsOur results imply that conformation traits are complex and may be partly controlled by genes that are involved in bone and skeleton development, muscle and fat metabolism, and growth processes. A reliable list of QTL and candidate genes was provided that can be used in fine-mapping and marker assisted selection to improve conformation traits in pigs.Electronic supplementary materialThe online version of this article (doi:10.1186/s12711-017-0289-2) contains supplementary material, which is available to authorized users.

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Sow longevity

Moeller,

Stalder

2024

Advances in Pig Welfare

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The genetic relationships between conformation assessment of gilts and sow production and longevity

Cited by 19 publications

References 25 publications

Genetic association between leg conformation in young pigs and sow longevity

Genetic association between leg conformation in young pigs and sow longevity

Genome-wide association study for conformation traits in three Danish pig breeds

Sow longevity

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