Please use this identifier to cite or link to this item: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1133527
Title: Genetic diversity and population genetic structure of a Guzerá (Bos indicus) meta-population.
Authors: PEIXOTO, M. G. C. D.
CARVALHO, M. R. S.
EGITO, A. A. do
STEINBERG, R. S.
BRUNELI, F. A. T.
MACHADO, M. A.
SANTOS, F. C.
ROSSE, I. C.
FONSECA, P. A. S.
Affiliation: MARIA GABRIELA CAMPOLINA D PEIXOTO, CNPGL; MARIA RAQUEL S. CARVALHO, Universidade Federal de Minas Gerais; ANDREA ALVES DO EGITO, CNPGC; RAPHAEL S. STEINBERG, Universidade Federal de Minas Gerais; FRANK ANGELO TOMITA BRUNELI, CNPGL; MARCO ANTONIO MACHADO, CNPGL; FERNANDA C. SANTOS, Universidade Federal de Minas Gerais; IZINARA C. ROSSE, Universidade Federal de Ouro Preto; PABLO AUGUSTO S. FONSECA, University of Guelph.
Date Issued: 2021
Citation: Animals, v. 11, 1125, 2021.
Description: 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.
Thesagro: Bovino
Gado Zebu
Variação Genética
NAL Thesaurus: Artificial selection
Keywords: Seleção artificial
Diversidade genética
Estrutura genética
Livestock conservation
Genetic variability
Sustainable management
Language: Ingles
DOI: https:// doi.org/10.3390/ani11041125
Type of Material: Artigo de periódico
Access: openAccess
Appears in Collections:Artigo em periódico indexado (CNPGL)

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