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Selection signatures in Canchim beef cattle

BACKGROUND: Recent technological advances in genomics have allowed the genotyping of cattle through single nucleotide polymorphism (SNP) panels. High-density SNP panels possess greater genome coverage and are useful for the identification of conserved regions of the genome due to selection, known as...

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Detalles Bibliográficos
Autores principales: Urbinati, Ismael, Stafuzza, Nedenia Bonvino, Oliveira, Marcos Túlio, Chud, Tatiane Cristina Seleguim, Higa, Roberto Hiroshi, Regitano, Luciana Correia de Almeida, de Alencar, Maurício Mello, Buzanskas, Marcos Eli, Munari, Danísio Prado
Formato: Online Artículo Texto
Lenguaje:English
Publicado: BioMed Central 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4858954/
https://www.ncbi.nlm.nih.gov/pubmed/27158491
http://dx.doi.org/10.1186/s40104-016-0089-5
Descripción
Sumario:BACKGROUND: Recent technological advances in genomics have allowed the genotyping of cattle through single nucleotide polymorphism (SNP) panels. High-density SNP panels possess greater genome coverage and are useful for the identification of conserved regions of the genome due to selection, known as selection signatures (SS). The SS are detectable by different methods, such as the extended haplotype homozygosity (EHH); and the integrated haplotype score (iHS), which is derived from the EHH. The aim of this study was to identify SS regions in Canchim cattle (composite breed), genotyped with high-density SNP panel. RESULTS: A total of 687,655 SNP markers and 396 samples remained for SS analysis after the genotype quality control. The iHS statistic for each marker was transformed into piHS for better interpretation of the results. Chromosomes BTA5 and BTA14 showed piHS > 5, with 39 and nine statistically significant SNPs (P < 0.00001), respectively. For the candidate selection regions, iHS values were computed across the genome and averaged within non-overlapping windows of 500 Kb. We have identified genes that play an important role in metabolism, melanin biosynthesis (pigmentation), and embryonic and bone development. CONCLUSIONS: The observation of SS indicates that the selection processes performed in Canchim, as well as in the founder breeds (i.e. Charolais), are maintaining specific genomic regions, particularly on BTA5 and BTA14. These selection signatures regions could be associated with Canchim characterization. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (doi:10.1186/s40104-016-0089-5) contains supplementary material, which is available to authorized users.