Acta Veterinaria et Zootechnica Sinica ›› 2020, Vol. 51 ›› Issue (4): 713-721.doi: 10.11843/j.issn.0366-6964.2020.04.007

• ANIMAL GENETICS AND BREEDING • Previous Articles     Next Articles

Identification of Growth-Related Genes under Selection in Angus Cattle Using SLAF-seq

Lü Shijie1,2, CHEN Fuying1,2, JIN Lei1,2, ZHANG Zijing1,2, ZHU Xiaoting1,2, SHI Qiaoting1,2, XIN Xiaoling1,2, CHU Qiuxia1,2, BAI Zhonglin3, WANG Eryao1,2*, XU Zhaoxue1,2*   

  1. 1. Institute of Animal Science and Veterinary Medicine, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China;
    2. Henan Key Laboratory of Livestock and Poultry Breeding and Nutrition Regulation, Zhengzhou 450002, China;
    3. Center of Animal Disease Prevention and Control of Biyang, Zhumadian 463700, China
  • Received:2019-10-29 Online:2020-04-25 Published:2020-04-21

Abstract: The aims of this study were to investigate the growth-related genes under selection in Angus cattle and provide a reference for identification of major genes for beef cattle growth. Blood samples of 72 Nanyang cows and 14 Black Angus cows were collected and used to isolate genomic DNA. The genome-wide SNP markers and genotypes of individuals were obtained by using SLAF-seq technology. Fst and π ratio values of each SNP were calculated for selecting the different genomic regions between the two breeds. Afterward, these identified regions were compared with the cattle growth QTLs in animal QTLdb. The overlapping regions were considered as candidate regions for further analysis. Genes within the overlapping regions were screened as candidate genes based on the gene annotation. Tissue expression status of candidate genes were checked in the "Expression Atlas" database. After filtering, 69 762 SNPs were remained for the further analysis. Using the 99% quantiles of Fst and π ratio values as thresholds, 33 genomic regions with high differences between the two breeds were screened. Among them, there were 16 genomic regions overlapped with the cattle growth QTLs. Within the 16 regions, 27 genes were located, among them, 4 genes (FXR1, ADAR, IGF1, MNF1) were related to bone/muscle development and growth regulation. FXR1 and MNF1 genes were highly expressed in the skeletal muscle. ADAR and IGF1 genes were highly expressed in the brain and liver, respectively. IGF1 gene can be considered as a major candidate gene for beef cattle growth, FXR1, ADAR and MNF1 genes are prioritized as potential candidate genes for further verification.

Key words: Nanyang cattle, growth trait, candidate gene, selective sweep, Fst

CLC Number: