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Use of single-step genome-wide association studies for prospecting genomic regions related to milk production and milk quality of buffalo

  • Camila da Costa Barros (a1), Daniel Jordan de Abreu Santos (a1), Rusbel Raul Aspilcueta-Borquis (a2), Gregório Miguel Ferreira de Camargo (a3), Francisco Ribeiro de Araújo Neto (a4) and Humberto Tonhati (a1)...

Abstract

The aim of this research communication was to identify chromosome regions and genes that could be related to milk yield (MY), milk fat (%F) and protein percentage (%P) in Brazilian buffalo cows using information from genotyped and non-genotyped animals. We used the 90 K Axiom® Buffalo Genotyping array. A repeatability model was used. An iterative process was performed to calculate the weights of markers as a function of the squared effects of Single Nucleotide Polymorphism (SNP) and allele frequencies. The 10 SNPs with the largest effects for MY, %F and %P were studied and they explained 7·48, 9·94 and 6·56% of the genetic variance, respectively. These regions harbor genes with biological functions that could be related to the traits analyzed. The identification of such regions and genes will contribute to a better understanding of their influence on milk production and milk quality traits of buffaloes.

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*For correspondence; e-mail: mila_costabarros@hotmail.com

References

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