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Title: Genetic diversity and population genetic structure of a guzerá (Bos indicus) meta-population.
Authors: Peixoto, Maria Gabriela Campolina Diniz
Carvalho, Maria Raquel Santos
Egito, Andréa Alves do
Silva, Raphael Steinberg da
Bruneli, Frank Angelo Tomita
Machado, Marco Antônio
Santos, Fernanda Caroline dos
Cruz, Izinara Rosse da
Fonseca, Pablo Augusto S.
Keywords: Zebu cattle
Genetic variability
Artificial selection
Sustainable management
Livestock conservation
Issue Date: 2021
Citation: PEIXOTO, M. G. C. D. et al. Genetic diversity and population genetic structure of a guzerá (Bos indicus) meta-population. Animals, v. 11, 2021. Disponível em: <>. Acesso em: 11 out. 2022.
Abstract: The Brazilian Guzerá population originated from a few founders introduced from India. These animals adapted well to the harsh environments in Brazil, were selected for beef, milk, or dual-purpose (beef and milk), and were extensively used to produce crossbred animals. Here, the impact of these historical events with regard to the population structure and genetic diversity in a Guzerá meta-population was evaluated. DNA samples of 744 animals (one dairy, nine dual-purpose, and five beef herds) were genotyped for 21 microsatellite loci. Ho, He, PIC, Fis, Fit, and Fst estimates were obtained considering either farms or lineages as subpopulations. Mean Ho (0.73) and PIC (0.75) suggest that genetic diversity was efficiently conserved. Fit, Fis and Fst values (95% CI) pointed to a low fixation index, and large genetic diversity: Fit (Farms = 0.021–0.100; lineages = 0.021–0.100), Fis (Farms = –0.007–0.076; lineages = −0.014–0.070), and Fst (Farms = 0.0237–0.032; lineages = 0.029– 0.038). The dual-purpose herds/selection lines are the most uniform subpopulation, while the beef one preserved larger amounts of genetic diversity among herds. In addition, the dairy herd showed to be genetically distant from other herds. Taken together, these results suggest that this Guzerá meta-population has high genetic diversity, a low degree of population subdivision, and a low inbreeding level.
ISSN: 2076-2615
metadata.dc.rights.license: This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https:// 4.0/). Fonte: o PDF do artigo.
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