- -

Inbreeding depression load for litter size in Entrepelado and Retinto Iberian pig varieties

RiuNet: Institutional repository of the Polithecnic University of Valencia

Share/Send to

Cited by

Statistics

Inbreeding depression load for litter size in Entrepelado and Retinto Iberian pig varieties

Show simple item record

Files in this item

dc.contributor.author Casellas, J. es_ES
dc.contributor.author Ibañez Escriche, Noelia es_ES
dc.contributor.author Varona, L. es_ES
dc.contributor.author Rosas, J.P. es_ES
dc.contributor.author Noguera, J.L. es_ES
dc.date.accessioned 2020-04-24T07:13:37Z
dc.date.available 2020-04-24T07:13:37Z
dc.date.issued 2019 es_ES
dc.identifier.issn 0021-8812 es_ES
dc.identifier.uri http://hdl.handle.net/10251/141441
dc.description.abstract [EN] Individual-specific hidden inbreeding depression load (IDL) can be accounted for in livestock populations by appropriate best linear unbiased prediction approaches. This genetic effect has a recessive pattern and reveals when inherited in terms of identity-by-descent. Nevertheless, IDL inherits as a pure additive genetic background and can be selected using standard breeding values. The main target of this research was to evaluate IDL for litter size in 2 Iberian pig varieties (Entrepelado and Retinto) from a commercial breeding-stock. Analyses were performed on the total number of piglets born (both alive and dead) and used data from 3,200 (8.02 ± 0.04 piglets/litter) Entrepelado and 4,744 Retinto litters (8.40 ± 0.03 piglets/litter). Almost 50% of Entrepelado sows were inbred (1.7% to 25.0%), whereas this percentage reduced to 37.4% in the Retinto variety (0.2% to 25.0%). The analytical model was solved by Bayesian inference and accounted for 2 systematic effects (sow age and breed/variety of the artificial insemination boar), 2 permanent environmental effects (herd-year-season and sow), and 2 genetic effects (IDL and infinitesimal additive). In terms of posterior means (PM), additive genetic and IDL variances were similar in the Entrepelado variety (PM, 0.68 vs. 0.76 piglets2, respectively) and their 95% credibility intervals (95CI) overlapped, although without including zero (0.38 to 0.94 vs. 0.15 to 1.31 piglets2, respectively). The same pattern revealed in the Retinto variety, with IDL variance (PM, 0.41 piglets2; 95CI, 0.07 to 0.88 piglets2) slightly larger than the additive genetic variance (PM, 0.37 piglets2; 95CI, 0.16 to 0.59 piglets2). The relevance of IDL was also checked by a Bayes factor and the deviance information criterion, the model including this effect being clearly favored in both cases. Although the analysis assumed null genetic covariance between IDL and infinitesimal additive effects, a moderate negative correlation (¿0.31) was suggested when plotting the PM of breeding values in the Entrepelado variety; a negative genetic trend for IDL was also revealed in this Iberian pig variety (¿0.25 piglets for 100% inbred offspring of individuals born in 2014), whereas no trend was detected in Retinto breeding-stock. Those were the first estimates of IDL in a commercial livestock population, they giving evidence of a relevant genetic background with potential consequences on the reproductive performance of Iberian sows. es_ES
dc.description.sponsorship The authors gratefully acknowledge the company INGA FOOD SA (Almendralejo, Spain) and its technicians (E. Magallon, M. J. Garcia-Santana, L. Munoz, P. Diaz, D. Iniesta, and M. Ramos), as well as S. Negro (IRTA), for their cooperation and technical support. This research was partially funded by grants CGL2016-80155-R and IDI-20170304 from Spain's Ministry of Science, Innovation and Universities. es_ES
dc.language Inglés es_ES
dc.publisher American Society of Animal Science es_ES
dc.relation MICINN/CGL2016-80155-R es_ES
dc.relation MICINN/IDI-20170304 es_ES
dc.relation.ispartof Journal of Animal Science es_ES
dc.rights Reserva de todos los derechos es_ES
dc.subject Best linear unbiased prediction es_ES
dc.subject Iberian pig es_ES
dc.subject Identity-by-descent es_ES
dc.subject Inbreeding depression es_ES
dc.subject Total number born es_ES
dc.subject.classification PRODUCCION ANIMAL es_ES
dc.title Inbreeding depression load for litter size in Entrepelado and Retinto Iberian pig varieties es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.1093/jas/skz084 es_ES
dc.rights.accessRights Abierto es_ES
dc.contributor.affiliation Universitat Politècnica de València. Departamento de Ciencia Animal - Departament de Ciència Animal es_ES
dc.description.bibliographicCitation Casellas, J.; Ibañez Escriche, N.; Varona, L.; Rosas, J.; Noguera, J. (2019). Inbreeding depression load for litter size in Entrepelado and Retinto Iberian pig varieties. Journal of Animal Science. 97(5):1979-1986. https://doi.org/10.1093/jas/skz084 es_ES
dc.description.accrualMethod S es_ES
dc.relation.publisherversion https://doi.org/10.1093/jas/skz084 es_ES
dc.description.upvformatpinicio 1979 es_ES
dc.description.upvformatpfin 1986 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 97 es_ES
dc.description.issue 5 es_ES
dc.relation.pasarela S\380799 es_ES
dc.contributor.funder Ministerio de Ciencia, Innovación y Universidades es_ES


This item appears in the following Collection(s)

Show simple item record