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Systematic Identification and Evolution Analysis of Sox Genes in Coturnix japonica Based on Comparative Genomics

The Institute of Bioinformatics, College of Life Sciences, Anhui Normal University, Wuhu, 241000, China
State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, 650000, China
The Provincial Key Laboratory of the Conservation and Exploitation Research of Biological Resources in Anhui, Wuhu, 241000, China
Authors to whom correspondence should be addressed.
Genes 2019, 10(4), 314;
Received: 15 February 2019 / Revised: 16 April 2019 / Accepted: 20 April 2019 / Published: 22 April 2019
(This article belongs to the Section Animal Genetics and Genomics)
PDF [3862 KB, uploaded 22 April 2019]


Coturnix japonica (Japanese quail) has been extensively used as a model animal for biological studies. The Sox gene family, which was systematically characterized by a high-mobility group (HMG-box) in many animal species, encodes transcription factors that play central roles during multiple developmental processes. However, genome-wide investigations on the Sox gene family in birds are scarce. In the current study, we first performed a genome-wide study to explore the Sox gene family in galliform birds. Based on available genomic sequences retrieved from the NCBI database, we focused on the global identification of the Sox gene family in C. japonica and other species in Galliformes, and the evolutionary relationships of Sox genes. In our result, a total of 35 Sox genes in seven groups were identified in the C. japonica genome. Our results also revealed that dispersed gene duplications contributed the most to the expansion of the Sox gene family in Galliform birds. Evolutionary analyses indicated that Sox genes are an ancient gene family, and strong purifying selections played key roles in the evolution of CjSox genes of C. japonica. More interestingly, we observed that most Sox genes exhibited highly embryo-specific expression in both gonads. Our findings provided new insights into the molecular function and phylogeny of Sox gene family in birds. View Full-Text
Keywords: SOX; gene family; HMG-box; Japanese quail; genomics SOX; gene family; HMG-box; Japanese quail; genomics

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Jiang, L.; Bi, D.; Ding, H.; Wu, X.; Zhu, R.; Zeng, J.; Yang, X.; Kan, X. Systematic Identification and Evolution Analysis of Sox Genes in Coturnix japonica Based on Comparative Genomics. Genes 2019, 10, 314.

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