Genetic variability in local Brazilian horse lines using microsatellite markers

Genetics and Molecular Research : GMR
A C M SilvaC M McManus

Abstract

Genetic variability at 11 microsatellite markers was analyzed in five naturalized/local Brazilian horse breeds or genetic groups. Blood samples were collected from 328 animals of the breeds Campeira (Santa Catarina State), Lavradeira (Roraima State), Pantaneira (Pantanal Mato-Grossense), Mangalarga Marchador (Minas Gerais State), as well as the genetic group Baixadeiro (Maranhão State), and the exotic breeds English Thoroughbred and Arab. We found significant genetic variability within evaluated microsatellite loci, with observed heterozygosis varying between 0.426 and 0.768 and polymorphism information content values of 0.751 to 0.914. All breeds showed high inbreeding coefficients and were not in Hardy-Weinberg equilibrium. The smallest genetic distance was seen between the Pantaneira and Arab breeds. The principal component analyzes and Bayesian approach demonstrated that the exotic breeds have had a significant influence on the genetic formation of the local breeds, with introgression of English Throroughbred in Pantaneira and Lavradeira, as well as genetic proximity between the Arab, Pantaneira and Mangalarga Marchador populations. This study shows the need to conserve traits acquired by naturalized horse breeds over centu...Continue Reading

References

Dec 7, 2007·Progress in Neuro-psychopharmacology & Biological Psychiatry·Zrnka KovacicAndrea Borovecki

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Citations

May 29, 2020·PeerJ·Hovirag LancioniArianna Miglio
Sep 2, 2017·Genetics and Molecular Biology·Patrícia IanellaConcepta Margaret McManus
Jan 16, 2021·Tropical Animal Health and Production·Concepta Margaret McManusSamuel Rezende Paiva
Dec 6, 2020·Journal of Equine Veterinary Science·Marielle M BaenaSarah L C Meirelles
Aug 8, 2021·Animals : an Open Access Journal From MDPI·Ante IvankovićJelena Ramljak

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