Identification and Expression Analysis of FT Gene Family in Salvia miltiorrhiza
Yang Sheng
Liu Shan
Sun Nan
Li Jia
Huang Luyao
Hou Congzhe
Liu Zhenhua
Abstract：FLOWERING LOCUS T(FT)gene plays a pivotal role in the induction of flowering in the higher plants,serving as a crucial integrator within the floral regulatory network.Nevertheless,no prior studies have reported on identification and analysis of the FT gene family in Salvia miltiorrhiza.In this study,the FT gene family was identified in the S.miltiorrhiza genome and analyzed by bioinformatics methods.The expres-sion pattern of the FT genes in different tissues of flowering and non-flowering S.miltiorrhiza.The results re-vealed that the FT gene family in S.miltiorrhiza comprised 10 members,encoding 165 to 193 amino acids.All the FT proteins were hydrophilic proteins with the isoelectric points between 5.45 and 9.60,and the relative molecular weight ranging from 17.85 to 22.04 kDa.The members of the S.miltiorrhiza FT family had similar gene structures and their protein sequences were relatively conserved.The prediction results of cis-acting ele-ments indicated that the FT gene family of S.miltiorrhiza might be involved in the growth and development processes such as flowering induction.The results of evolutionary tree showed that the S.miltiorrhiza FT genes were distributed in YBHB,MFT,FT and TFL subfamilies.The expression pattern analysis revealed distinct tissue specificity in the expression of FT genes,which could be categorized as follows:(1)SmFT,SmFTL2 and SmFTL5 showed elevated expression in the leaves of flowering S.miltiorrhiza;(2)SmFTL1,SmFTL3 and SmFTL8 exhibited high expression levels in the leaves of non-flowering S.miltiorrhiza;(3)SmFTL4 and SmFTL9 displayed significant expression in the roots of flowering S.miltiorrhiza;(4)SmFTL6 and SmFTL7 displayed significant expression in the roots of non-flowering S.miltiorrhiza.These findings suggested a poten-tial synergistic regulation among these four gene groups to maintain a balance between above-ground flowering and underground root development.Consequently,these results could provide valuable insights for breeding high-yield new germplasm of S.miltiorrhiza by adjusting the distribution ratio of biomass between aboveground and subsurface parts.
Keywords：FT geneSalvia miltiorrhizaBioinformatics analysisExpression pattern analysisFlower-ing induction
Publication Date：2025-11-30
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：9( 1-9 )