Molecular Study of the Amazonian Macabea Cattle History

• Published in: PloS one Vol. 11; no. 10; p. e0165398
• Main Authors: Vargas, Julio, Landi, Vincenzo, Martínez, Amparo, Gómez, Mayra, Camacho, María Esperanza, Álvarez, Luz Ángela, Aguirre, Lenin, Delgado, Juan Vicente
• Format: Journal Article
• Language: English
• Published: United States Public Library of Science 24.10.2016; Public Library of Science (PLoS)
• Subjects: 20th century; Animals; Beef cattle; Biodiversity; Biological evolution; Biology and Life Sciences; Bos taurus; Bovidae; Breeding of animals; Cattle; Cattle - genetics; Computer and Information Sciences; Conservation; Creoles; Deoxyribonucleic acid; DNA; Domestication; Earth Sciences; Ecology; Ecology and Environmental Sciences; Evolution; Farms; Female; Genetic analysis; Genetic distance; Genetic diversity; Genetic structure; Genetics; Heterozygosity; Livestock; Male; Microsatellite Repeats - genetics; Phylogenetics; Population genetics; South America; Structural analysis; Sustainable development; Brazil; Ecuador; Colombia; United States > US
• ISSN: 1932-6203; 1932-6203
• DOI: 10.1371/journal.pone.0165398

Macabea cattle are the only Bos taurus breed that have adapted to the wet tropical conditions of the Amazon. This breed has integrated into the culture of the indigenous Shuar-Asuar nations probably since its origins, being one of the few European zoogenetic resources assimilated by the deep-jungle Amazon communities. Despite its potential for local endogenous sustainable development, this breed is currently endangered. The present study used molecular genetics tools to investigate the within- and between-breeds diversity, in order to characterize the breed population, define its associations with other breeds, and infer its origin and evolution. The within-breed genetic diversity showed high values, as indicated by all genetic parameters, such as the mean number of alleles (MNA = 7.25±2.03), the observed heterozygosity (Ho = 0.72±0.02) and the expected heterozygosity (He = 0.72±0.02). The between-breeds diversity analysis, which included factorial correspondence analysis, Reynolds genetic distance, neighbor-joining analysis, and genetic structure analysis, showed that the Macabea breed belongs to the group of the American Creoles, with a Southern-Spain origin. Our outcomes demonstrated that the Macabea breed has a high level of purity and null influences of exotic cosmopolitan breeds with European or Asiatic origin. This breed is an important zoogenetic resource of Ecuador, with relevant and unique attributes; therefore, there is an urgent need to develop conservation strategies for the Macabea breed.