Genome-wide Identification And Analysis Of TCP Transcription Factors In Pepper

The plant-specific Teosinte branched1/Cincinnata/proliferating cell factor(TCP)transcription factor family,which is involved in the regulation of cell growth and proliferation,performs diverse functions in multiple aspects of plant growth and development.However,no comprehensive analysis of the TCP family in pepper(Capsicum annuum L.)has been undertaken previously.The family members,gene classification and stracture,chromosome location,phylogenetic relationship and conserverd stracture domains of CaTCP were predicted and analyzed with bioinformation method.A total of 30 pepper TCP encoding genes distributed on ten chromosomes were identified.CaTCP protein contained 95~550 amino acids with the isoelectric point of 6.30~10.91.Phylogenetic analysis clustered the genes into 11 distinct subgroups.Furthermore,phylogenetic and structural analyses distinguished two homology classes within the CaTCP family,designated Class I and Class II.The Class II genes were differentiated into two subclasses,the CIN subclass and the CYC/TB1 subclass.Most CaTCP genes within the same subfamily demonstrated similar exon and intron organization.Additionally,the chromosomal distribution pattern revealed that CaTCP genes were unevenly distributed across 10 out of the 12 chromosomes.Chromosome 3 encompassed the most CaTCP gene number of 7.This study represents the first genome-wide analysis of the pepper TCP gene family,which provides valuable information for understanding the classification and functions of the TCP genes in pepper.