Since the introduction of horses in Brazil a variety of local breeds with highly specific phenotypes has arisen. These breeds are important to local communities since they are strongly associated with subsistence farming activities. In order to subsidize management decisions this study investigated the genetic diversity and population structure from eight horse breeds locally adapted in Brazil (Campeira, Crioula, Lavradeira, Pantaneira, Mangalarga Marchador, Puruca pony and Baixadeiro genetic group). Data from 243 horses genotyped using the Illumina EquineSNP70 BeadChip were analyzed and results indicate low differentiation among most of the studied breeds and moderate differentiation among Crioula and the others. Population structure analyses revealed that breeds are clustered in genetic groups highly correlated with geographical proximity. This pattern suggests similar origin and/or crossbreeding among these breeds. The results provide a better definition than microsatellites markers and have showed new insights into the relationships among Brazilian horse breeds, highlighting the need for better management strategies for conservation of these populations. Keywords: creoule breeds; Equus caballus; SNP

Patricia Ianella, Maria do Socorro Albuquerque, Alexandre R Caetano, Gleison R Biazio, Samuel R Paiva, Alcebíades R Nepomuceno, Luiz Filipe R Carvalho, Concepta M McManus

Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume Electronic Poster Session - Challenges - Species Conservation, , 60, 2018
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