Assessing genomic diversity and signatures of selection in Qingyuan Wapiti

Red deer is a species of family Cervidae that is widely distributed in the world and is often raised to provide antlers, as a trophy or traditional medicine materials, and meat. Currently, the whole genomic data for red deer are very limited. Qingyuan Wapiti (QYW), China's first breed of red deer by artificial breeding, is well known for its high yield of antlers and large body size. The phylogenetic tree showed that QYW had a closer genetic relationship with Tarim red deer than European red deer. To explore the genetic diversity and selection signatures, the whole genome of 28 QYW individuals was sequenced, and 19 401 749 biallelic SNPs and 1 849 784 indels were obtained. The value of observed heterozygosity, expected heterozygosity, and nucleotide diversity were 0.258598, 0.268844, and 0.002193, respectively. Based on Tajima's D and integrated haplotype score analyses, the candidate regions containing 187 genes were detected, including PLD1, ANTXR1, PLCL1, CPE, and CTNNA3, which have been reported to be correlated with osteogenesis and mineralization, growth, and body size by previous studies. The results obtained in this study will contribute to elucidating the genetic mechanisms underlying the formation of excellent traits in QYW and provide the whole genome data for future exploration of genomic diversity and adaptation evolution of red deer worldwide.