Exploring the evolutionary characteristics between cultivated tea and its wild relatives using complete chloroplast genomes

• DOI: 10.1186/s12862-021-01800-1
• Publication Date: 2021-04-30T09:03:19Z
• Authors: Jiao Peng; Yunlin Zhao; Meng Dong; Shiquan Liu; Zhiyuan Hu; Xiaofen Zhong; Zhenggang Xu
• Keywords: Indel; Nucleotide diversity; Camellia

Cultivated tea is one of the most important economic and ecological trees distributed worldwide. suffer from long-term targeted selection traits overexploitation habitats by human beings, which may have changed its genetic structure. The chloroplast an organelle with a conserved cyclic genomic structure, it can help us better understand evolutionary relationship Camellia plants. We conducted comparative analyses on cultivated wild tea, we detected characteristics tea. genome sizes were slightly different, ranging 157,025 to 157,100 bp. In addition, species more than species, in terms length, gene number, arrangement GC content. However, comparing sinensis var. assamica their cultivars, IR length variation was approximately 20 bp 30 bp, respectively. nucleotide diversity 14 sequences higher that Detailed analysis evolution cultivars revealed 67 single polymorphisms (SNPs), 46 insertions/deletions (indels), 16 protein coding genes substitutions, while 4 indels. variable ycf1. largest number five amino acids exhibited site-specific selection, 9 sequence insertion found cultivars. phylogenetic ycf1 tree suggested has diverged Because C. not tightly clustered. architecture linear order. mainly manifested insertions. These results provided evidence regarding influence activities