Articles | Volume 60, issue 3
https://doi.org/10.5194/aab-60-285-2017
https://doi.org/10.5194/aab-60-285-2017
Original study
 | 
29 Aug 2017
Original study |  | 29 Aug 2017

Evaluation of novel SNPs and haplotypes within the ATBF1 gene and their effects on economically important production traits in cattle

Han Xu, Sihuan Zhang, Xiaoyan Zhang, Ruihua Dang, Chuzhao Lei, Hong Chen, and Xianyong Lan

Abstract. AT motif binding factor 1 (ATBF1) gene can promote the expression level of the growth hormone 1 (GH1) gene by binding to the enhancers of the POU1F1 and PROP1 genes; thus, it affects the growth and development of livestock. Considering that the ATBF1 gene also has a close relationship with the Janus kinase–signal transductor and activator of transcription (JAK–STAT) pathway, the objective of this work was to identify novel single-nucleotide polymorphism (SNP) variations and their association with growth traits in native Chinese cattle breeds. Five novel SNPs within the ATBF1 gene were found in 644 Qinchuan and Jinnan cattle for first time using 25 pairs of screening and genotyping primers. The five novel SNPs were named as AC_000175:g.140344C>G (SNP1), g.146573T>C (SNP2), g.205468C>T (SNP3), g.205575A>G (SNP4) and g.297690C<T (SNP5). Among them, SNP1 and SNP2 were synonymous coding SNPs, while SNP5 was a missense coding SNP, and the other SNPs were intronic. Haplotype analysis found 18 haplotypes in the two breeds, and three and five closely linked loci were revealed in Qinchuan and Jinnan breeds, respectively. Association analysis revealed that SNP1 was significantly associated with the height across the hip in Qinchuan cattle. SNP2 was found to be significantly related to chest circumference and body side length traits in Jinnan cattle. SNP3 was found to have significant associations with four growth traits in Qinchuan cattle. Moreover, the different combined genotypes, SNP1–SNP3, SNP1–SNP4 and SNP2–SNP5 were significantly associated with the growth traits in cattle. These findings indicated that the bovine ATBF1 gene had marked effects on growth traits, and the growth-trait-related loci can be used as DNA markers for maker-assisted selection (MAS) breeding programs in cattle.

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Short summary
This work identified SNPs in the growth- and development-related ATBF1 gene in cattle. Five novel SNPs were found in 644 cattle. The results found that SNP1, SNP2, and SNP3 and the combined genotypes SNP1–SNP3, SNP1–SNP4 and SNP2–SNP5 were significantly associated with growth traits in Qinchuan and Jinnan cattle. These findings indicate that the bovine ATBF1 gene has marked effects on growth traits, and the growth-trait-related loci can be used as DNA markers for MAS breeding programs in cattle.