Genetic parameter estimation and gene association analyses for meat quality traits in open‐air free‐range Iberian pigs
| Autor: | Carmen Caraballo, Luis Silió, Patricia Palma-Granados, Fernando Sánchez-Esquiliche, Fernando Gómez‐Carballar, Carmen Rodríguez, Juan García-Casco, Miguel Ángel Fernández-Barroso, María Olga Macías Muñoz, Adrián García López |
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| Rok vydání: | 2020 |
| Předmět: |
Male
0301 basic medicine Candidate gene Meat Swine Range (biology) biology.animal_breed Paraspinal Muscles Single-nucleotide polymorphism Breeding Biology Loin Polymorphism Single Nucleotide Genetic analysis 03 medical and health sciences Quantitative Trait Heritable Animal science Food Animals Food Quality Animals Open air Iberian pig 0402 animal and dairy science 04 agricultural and veterinary sciences General Medicine Heritability 040201 dairy & animal science Phenotype 030104 developmental biology Animal Science and Zoology |
| Zdroj: | Journal of Animal Breeding and Genetics. 137:581-598 |
| ISSN: | 1439-0388 0931-2668 |
| Popis: | Meat quality of Iberian pigs is defined by the combination of their genetic characteristics and the particular production system. To carry out a genetic analysis of the main meat quality traits, we estimated their heritabilities, genetic correlations and the association effects of 32 selected SNPs of 12 candidate genes. A total of ten traits were measured in longissimus dorsi samples from 1,199 Iberian pigs fattened in the traditional free-range system: water holding capacity (thawing, cooking and centrifuge force water losses), instrumental colour (lightness L*, redness a* and yellowness b*), myoglobin content, shear force on cooked meat, and shear force and maximum compression force on dry-cured loin. Estimated heritability values were low to moderate (0.01 to 0.43) being the lowest for L* and the highest for cooking loss. Strong genetic correlations between water holding capacity traits (0.93 to 0.96) and between myoglobin content and a* (0.94) were observed. The association analyses revealed 19 SNPs significantly associated with different traits. Consistent and strong effects were observed between PRKAG3 SNPs (rs319678464G > C and rs330427832C > T), MYH3_rs81437544T > C, CASP3_rs319658214G > T and CTSL_rs332171512A > G and water losses. Also for CAPN1_rs81358667G > A and CASP3_rs319658214G > T and shear force. The SNPs mapping on PRKAG3 showed the highest effects on Minolta colour traits. Genotyping of these SNPs could be useful for the selection of Iberian young boars with similar estimated breeding values for productive traits. |
| Databáze: | OpenAIRE |
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