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Acta Horticulturae Sinica ›› 2026, Vol. 53 ›› Issue (1): 82-98.doi: 10.16420/j.issn.0513-353x.2025-0094

• Genetic & Breeding·Germplasm Resources·Molecular Biology • Previous Articles     Next Articles

Identification of the TCP Gene Family in Brassica campestris and Analysis of Their Effects on Axillary Bud Traits

ZHU Caishuo1,2, LI Jianzhong2,3, ZHANG Qiannan2,4, XU Lijie2,5, ZHANG Shujiang2, ZHANG Shifan2, LI Fei2, ZHANG Hui2, XU Jin1, SONG Zihan2,**(), LI Guoliang2,**()   

  1. 1 College of HorticultureShanxi Agricultural University,Taigu, Shanxi 030801, China
    2 State Key Laboratory of Vegetable BiobreedingInstitute of Vegetables and Flowers,Chinese Academy of Agricultural Sciences, Beijing 100081, China
    3 College of HorticultureAnhui Agricultural University, Hefei 230036, China
    4 Guyuan BranchNingxia Academy of Agricultural and Forestry Sciences,Guyuan, Ningxia 756000, China
    5 College of ForestryShenyang Agricultural University, Shenyang 110866, China
  • Received:2025-04-17 Revised:2025-09-19 Online:2026-01-25 Published:2026-01-26
  • Contact: SONG Zihan, LI Guoliang

Abstract:

Elucidating the mechanism by with the TCP gene family regulates of axillary buds in Brassica campestris is important for enhancing the plant architecture of B. campestris. Based on the homology between Arabidopsis TCP family members and the Brassica rapa genome,the TCP family members of Brassica campestris were screened and identified for physicochemical properties, phylogenetic relationships,gene structure,chromosomal localization,and covariance analysis,and the expression of TCP family genes in different Brassica campestris materials was also analyzed,and key genes related to the development of axillary buds of Brassica campestris were further identified for subcellular localization analysis. The results showed that a total of 39 TCP family members were identified in Brassica campestris,all of which contained conserved TCP structural domains. the TCP family genes were distributed unevenly on the chromosome. By selecting four kinds of Brassica campestris materials with different numbers of axillary buds for real-time fluorescence quantitative analysis,it was found that the TCP family of BraA05g005380.3C,BraA07g034590.3C,BraA03g048240.3C,BraA02g018710.3C,BraA03g038400.3C,and BraA01g034360.3C had significant expression differences,and it was hypothesized that these genes were key candidate genes for positively regulating axillary bud growth in Brassica campestris. Subcellular localization analysis of the above six genes revealed that the BraA07g034590.3C gene was localized to the nuclear membrane of the cell,while the rest of the genes were localized in the nucleus.

Key words: Brassica campestris, TCP, gene family, axillary bud, regulation gene