title: Genome-wide identification and expression analysis of SBP-box gene family in Sorghum bicolor L.
abstract: SQUAMOSA PROMOTER BINDING PROTEIN-box (SBP-box) family genes encoding plant-specific transcription factors are involved in many aspects of crop genetic improvement such as yield, plant-type and stress-resistance. The SBP-box gene family have important practical applications. In this study, 18 SBP-box genes were identified from the reference genome of sorghum (Sorghum bicolor L.) using bioinformatics. These genes distributed on nine chromosomes while eight of them located in the segmental duplication region. Phylogenetic reconstruction resulted in six subfamilies of SBP-box genes, among which SbSBP12, SbSBP3 and SbSBP15 are orthologous to ZmLG1, ZmTGA1 and ZmUB2/3 in corn, respectively. RNA-seq data analysis indicated that SbSBP-box genes show the highest expression level in primordial inflorescences. Moreover, SbSBP9 and SbSBP17 exhibited a tissue specific expression in primordial inflorescences. The expression levels of SbSBP5, SbSBP8 and SbSBP18 were increased in response to exogenous ABA and PEG,indicating that SbSBP-box genes are involved in the defense response against abiotic stresses in sorghum. This research provides references for cloning important genes in SbSBP-box gene family. Genes identified in this study could be considered as candidate genes for genetic improvement of sorghum.
authors.affiliation: Dryland Agriculture Research Center, Shanxi Academy of Agricultural Sciences/Key Laboratory of Crop Gene Resources and Germplasm Enhancement on Loess Plateau, Ministry of Agriculture, Taiyuan 030031, China.
authors.forename: Jian-zhong
authors.initials: JZ
authors.lastname: Chang
authors.affiliation: Sorghum Institute of Shanxi Academy of Agricultural Sciences/Shanxi Key Laboratory of Sorghum Genetic and Germplasm Innovation, Jinzhong 030600, China.
authors.forename: Feng-xia
authors.initials: FX
authors.lastname: Yan
authors.affiliation: Institute of Crop Science, Shanxi Academy of Agricultural Sciences, Taiyuan 030031, China.
authors.forename: Lin-yi
authors.initials: LY
authors.lastname: Qiao
authors.affiliation: Institute of Crop Science, Shanxi Academy of Agricultural Sciences, Taiyuan 030031, China.
authors.forename: Jun
authors.initials: J
authors.lastname: Zheng
authors.affiliation: Sorghum Institute of Shanxi Academy of Agricultural Sciences/Shanxi Key Laboratory of Sorghum Genetic and Germplasm Innovation, Jinzhong 030600, China.
authors.forename: Fu-yao
authors.initials: FY
authors.lastname: Zhang
authors.affiliation: Sorghum Institute of Shanxi Academy of Agricultural Sciences/Shanxi Key Laboratory of Sorghum Genetic and Germplasm Innovation, Jinzhong 030600, China.
authors.forename: Qing-shan
authors.initials: QS
authors.lastname: Liu
mesh_terms: D032461:Chromosomes, Plant / Q000235:genetics; D018506:Gene Expression Regulation, Plant / Q000235:genetics*; D017343:Genes, Plant / Q000235:genetics*; D018745:Genome, Plant / Q000235:genetics*; D005810:Multigene Family / Q000235:genetics*; D010940:Plant Proteins / Q000235:genetics*; D045868:Sorghum / Q000235:genetics*
chemical_list: D010940:Plant Proteins