Data/hora: 17/06/2024 03:36:34

Biblioteca(s): | Embrapa Gado de Corte; Embrapa Gado de Leite.
Data corrente: | 13/08/2021
Data da última atualização: | 21/09/2021
Autoria: | 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.
Afiliação: | 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.
Título: | Genetic diversity and population genetic structure of a Guzerá (Bos indicus) meta-population.
Ano de publicação: | 2021
Fonte/Imprenta: | Animals, v. 11, 1125, 2021.
DOI: | https:// doi.org/10.3390/ani11041125
Idioma: | Inglês
Conteúdo: | 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 = &#65533;&#65533;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.
Palavras-Chave: | Diversidade genética; Estrutura genética; Genetic variability; Livestock conservation; Seleção artificial; Sustainable management.
Thesagro: | Bovino; Gado Zebu; Variação Genética.
Thesaurus Nal: | Artificial selection.
Categoria do assunto: | L Ciência Animal e Produtos de Origem Animal
URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/item/225142/1/Genetic-diversity.pdf
Registro original: | Embrapa Gado de Leite (CNPGL)

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