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CHINESE JOURNAL OF OIL CROP SCIENCES ›› 2021, Vol. 43 ›› Issue (5): 783-.doi: 10.19802/j.issn.1007-9084.2020282

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Genome-wide identification and phylogenetic analysis of SERK gene family in Brassica napus

  

  1. 1. College of Agriculture, Yangtze University, Hubei Collaborative Innovation Center for Grain Industry, Engineering Research Center of Ecology and Agricultural Use of Wetland, Ministry of Education, Jingzhou 434025, China; 2. Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 10081, China
  • Online:2021-11-01 Published:2021-11-01

Abstract: Somatic embryogenesis receptor-like kinase (SERK) is related to plant somatic embryogenesis, especially plant response to abiotic stress. In order to identify members of BnaSERK gene family in Brassica napus, cultivar Zhongshuang 11 was used to study their evolutionary relationship and function on drought and salt tolerance. Expression patterns were also explored on parts of the BnaSERK genes under drought and salt stress. A total of 24 BnaSERK genes were identified in B. napus genome, which were divided into 3 sub-families and distributed unevenly on 15 chromosomes. Their conservative gene structures and motifs were found exist with various cis-acting elements related to hormones and abiotic stress. Collinearity analysis showed that respectively 14, 44 and 32 genes in B. napus were collinear with Arabidopsis, B. rapa and B. oleracea. Based on comparative genomics information, BnaSERK genes in B. napus had undergone polyploidization and gene loss or expansion to varying degrees. Selection pressure analysis showed that the BnaSERK gene family was relatively conservative during evolution process among Brassica species. BnaSERK gene expression patterns in leaves under either salt or drought stress revealed their important roles in stress. Results showed that BnaA07g29610D, BnaC01g43240D and BnaCnng07810D genes were up-regulated, while BnaA01g23070D and BnaA07g23390D genes were down-regulated under salt. BnaA07g23390D and BnaA07g29610D genes were up-regulated, and BnaC01g43240D, BnaCnng07810D and BnaA01g23070D genes were down-regulated under drought stress.

Key words: Brassica napus L., SERK gene family, systematic evolution, abiotic stress

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