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Chinese Agricultural Science Bulletin ›› 2026, Vol. 42 ›› Issue (18): 150-158.doi: 10.11924/j.issn.1000-6850.casb2025-0842

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Sequence Characteristics and Codon Bias Analysis of Chloroplast Genomes in Local Population of Suichuan Gougunao Tea Tree

YIN Minghua(), DONG Jiaying, CHEN Liyan, LI Junyan, DENG Yun, HUANG Jia   

  1. College of Life Sciences, Shangrao Normal University, Shangrao, Jiangxi 334001
  • Online:2026-09-25 Published:2026-09-24

Abstract:

To analyze the complete chloroplast genome characteristics of the local population of Suichuan Gougunao tea tree, the DNBSEQ-T7 BGI sequencing platform and bioinformatics analysis software were used in this study to analyze the chloroplast genome of the local population of Suichuan Gougunao tea tree. The chloroplast genome of the local population of Suichuan Gougunao tea tree was a typical quadripartite circular structure with a total length of 157099 bp. A total of 135 functional genes were annotated, and 53 simple sequence repeat (SSR) loci and 48 long repeats were detected. The variation range of nucleotide polymorphism (Pi) was 0-0.01265, with weak codon bias. There were a total of 14 optimal codons, with the ndhB gene and rps8 gene undergoing positive selection, while the remaining genes were subject to purifying selection. The local population of Suichuan Gougunao tea tree was closely related to Dehong tea (KJ806279). The divergence time between the local population of Suichuan Gougunao tea tree and Tingpingdong (PP231879) and Liubao tea (OQ281601) was approximately 5.55 million years ago.

Key words: Suichuan Gougunao tea tree, the local population, chloroplast genome, sequence features, codon bias, phylogeny

CLC Number: