Genetic structure and population dynamics of autochthonous and modern porcine breeds. Analysis of IGF2 and MC4R genes that determine carcass characteristics.

  • Silvia Llambí
  • María Montenegro
  • Rosa Gagliardi
  • Carmen Burgos
  • Jorge Hidalgo
  • Pascual López-Buesa
  • María V. Arruga Universidad de Zaragoza. España

Abstract

Population dynamics and genetic structure are studied in the Pampa Rocha, Celta, Bizaro Portuguese, Duroc, Iberian Extremeño, and Iberian Andalusian porcine breeds on the IGF2 and MC4R genes, which determine meat characteristics and quality. It has been determined the degree of genetic variability (He = 0.2511 in Pampa Rocha; 0.0278 in Celta; 0,1453 in Bizaro Portuguese; 0.3719 in Duroc; 0.0764 in Iberian Extremeño and 0.0384 in Iberian Andalusian); genetic distance 1.21508 between the Duroc and Celtic, and the presence or absence of consanguinity. Only the Duroc population Fis was 0.00426 indicating a very low inbreeding, the rest of the populations did not present consanguinity. All of these values help to develop strategies against anthropogenic activities that hinder the conservation of the biodiversity of these porcine breeds. The IGF2 locus displayed polymorphism in the populations of Bizaro Portuguese and Duroc breeds, the frequency of the G allele much higher than A allele in the Bizaro Portuguese breed; in contrast, the A allele occurred at a higher frequency than the allele G in the Duroc breed. The A allele occurred at a very low frequency in the Pampa Rocha breed. These results are important to help breeder selectors increase the presence of the A allele for the improvement of muscle mass and reduction in the back-fat thickness in this breed. The other breeds did not display polymorphism for this locus, with a fixed G allele. The MC4R locus was polymorphic in all populations, with different frequencies for each allele.
Published
Sep 15, 2020
How to Cite
LLAMBÍ, Silvia et al. Genetic structure and population dynamics of autochthonous and modern porcine breeds. Analysis of IGF2 and MC4R genes that determine carcass characteristics.. Austral Journal of Veterinary Sciences, [S.l.], v. 52, n. 3, p. 87-94, sep. 2020. ISSN 0719-8132. Available at: <http://australjvs.cl/index.php/amv/article/view/988>. Date accessed: 23 nov. 2020.
Section
Original Article