Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Identification of Marbling Gene Loci in Commercial Pigs in Canadian Herds

William Jon Meadus
* ORCID logo ,
Pascale Duff
,
Jordan Roberts
,
Jennifer Zantinge
,
Ivy Larsen
,
Jennifer Aalhus
,
Manuel Juarez
Version 1 : Received: 20 June 2018 / Approved: 21 June 2018 / Online: 21 June 2018 (04:47:15 CEST)

A peer-reviewed article of this Preprint also exists.

Meadus, W.J.; Duff, P.; Juarez, M.; Roberts, J.C.; Zantinge, J.L. Identification of Marbling Gene Loci in Commercial Pigs in Canadian Herds. Agriculture 2018, 8, 122. Meadus, W.J.; Duff, P.; Juarez, M.; Roberts, J.C.; Zantinge, J.L. Identification of Marbling Gene Loci in Commercial Pigs in Canadian Herds. Agriculture 2018, 8, 122.

Abstract

We examined the amount of marbling and tested the genome of boars from 5 breeds of Duroc, Iberian, Lacombe, Berkshire and Pietrian that were commercially available for a swine herd in Canada. The marbling was ranked according to the amount of intramuscular fat % obtained in loin chops consisting of the longissimus dorsi muscle. The genetics were analysed by genome wide association study using 80,000 single nuclear polymorphism (SNP) microarrays. Our samples had pork that achieved > 7 % IMF from 110kg animals. Meta-analysis revealed SNP markers that were associated with the highest marbled pork chops on chromosomes 5, 7, and 16. Using the susScr 11.1 map, we determined that the nearest genes were SSNP, Rh glycoprotein and EGFLAM. We tested a sub-population of Duroc sired animals and found a different set of markers close to GRLB and KCNJ3 on chromosomes 8 and 15. Based on our sample, we can achieve pork with good marbling from animals conventionally raised to standard market weights of 110kg. The choice of a good marbling line of pig is not necessarily breed specific.

Keywords

pigs; genetics; marbling; IMF %, GWAS

Subject

Biology and Life Sciences, Biochemistry and Molecular Biology

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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