Data/hora: 05/06/2024 03:41:46

Biblioteca(s): | Embrapa Pantanal.
Data corrente: | 27/09/2022
Data da última atualização: | 03/01/2023
Autoria: | NOGUEIRA, M. B.; PIMENTEL, C. M.; FARIA, D. A. de; SANTOS, S. A.; IANELLA, P.; PAIVA, S. R.
Afiliação: | MARCELO BCHARA NOGUEIRA, UNIVERSIDADE DE BRASILIA; CONCEPTA M. PIMENTEL, UNIVERSIDADE DE BRASILIA; DANIELLE ASSIS DE FARIA, UNIVERSIDADE DE BRASILIA; SANDRA APARECIDA SANTOS, CPAP; PATRICIA IANELLA, Cenargen; SAMUEL REZENDE PAIVA, Cenargen.
Título: | Fine-scale genetic diversity of the Brazilian Pantaneiro Horse breed adapted to flooded regions.
Ano de publicação: | 2021
Fonte/Imprenta: | Tropical Animal Health and Production, v. 53, n. 525, 2021.
DOI: | https://doi.org/10.21203/rs.3.rs-654576/v1
Idioma: | Inglês
Notas: | Na publicação: Sandra Aparecida Oliveria Santos.
Conteúdo: | Among the animal species first introduced in Brazil during the country's discovery, horses (Equus caballus) stand out because of their evolutionary history and relationship with humans. Among the Brazilian horse breeds, the Pantaneiro draws attention due to its adaptative traits. Blood samples of 116 Pantaneiro horses were divided into six populations based on their sampling location, aiming to identify the existence of genetic structure and quantify genetic diversity within and between them. Populations were compared to elucidate genetic variability and differentiation better and assess the impact of Pantanal's natural geographic barriers on gene flow between populations. Data from the GGP Equine BeadChip (Geneseek-Neogen, 65.157 SNPs) was used to assess basic diversity parameters, genetic distance (FST ), Principal Component Analysis (PCA) and population structure (ADMIXTURE) for the sampled animals. Mantel Test was also performed to investigate the correlation between the populations' genetic and geographic distances. Results showed high genetic variability in all populations, with elevated levels of admixture in their structure. High levels of admixture make it challenging to establish a racial pattern and, consequently, populations within the breed, being that only one of the populations differentiated itself from the others. No significant correlations between genetic and geographic distances were observed, indicating that environmental barriers did not hinder gene flow between populations. and neither farmers selection practices might have change breed genetic composition signficantly Low genetic distance and similar heterozygosity values were observed among populations, suggesting strong genetic proximity and low differentiation. Thereby, the Pantaneiro breed does not exhibit genetic subpopulations and could be considered, for conservation purposes, a single big population in the Pantanal region. This study will support sampling strategies for National genebank.
Thesagro: | Cavalo.
Thesaurus Nal: | Horse breeds.
Categoria do assunto: | L Ciência Animal e Produtos de Origem Animal
Registro original: | Embrapa Pantanal (CPAP)
Exemplares: | CPAP - (60792-1) - UPC - AP - DD -  -  -  - DIS