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Chloroplast Genome Characteristics and Evolutionary Analysis of the Tea Plant Variety Zhuyeqi
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Wenjuan ZENG1, 2, 3, Qixiang ZHANG1, 2, 3, Ning HE1, 2, 3, Ya LIU1, 2, 3, Yihui GONG1, 2, 3, 4, Zhiyin CHEN1, 2, 3, 4
Chinese Journal of Tropical Crops | 2026, 47(2) : 313 - 324
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Chinese Journal of Tropical Crops | 2026, 47(2): 313-324
• Omics & Biotechnology •
Chloroplast Genome Characteristics and Evolutionary Analysis of the Tea Plant Variety Zhuyeqi
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Wenjuan ZENG1, 2, 3, Qixiang ZHANG1, 2, 3, Ning HE1, 2, 3, Ya LIU1, 2, 3, Yihui GONG1, 2, 3, 4, Zhiyin CHEN1, 2, 3, 4
Affiliations
  • 1.College of Agriculture and Biotechnology, Hunan University of Humanities, Science and Technology, Loudi, Hunan 417000, China
  • 2.Innovation and Entrepreneurship Education Center for Horticultural Production and Processing in Hunan Province, Hunan University of Humanities, Science and Technology, Loudi, Hunan 417000, China
  • 3.Hunan Provincial Innovation and Entrepreneurship Demonstration Base, Hunan University of Humanities, Science and Technology, Loudi, Hunan 417000, China
  • 4.Key Laboratory of Characteristic Agricultural Resource Development and Quality Safety Control in Hunan Province, Hunan University of Humanities, Science and Technology, Loudi, Hunan 417000, China
Published: 2026-02-25 doi: 10.3969/j.issn.1000-2561.2026.02.004
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This study represents sequencing of the chloroplast genome of the tea plant variety Zhuyeqi, with a focus on analyzing its structural characteristics, codon usage bias, and phylogenetic relationships. The results revealed that its chloroplast genome had 157 072 bp, with 135 functional genes annotated. The GC content in the IR region was found to be the highest (42.96%), and several intron-containing genes, such as clpP and ycf3, were identified. Codon usage bias analysis indicated a relatively weak bias, primarily driven by natural selection (contribution rate of 86.6%). Optimal codons were mostly A/U-ending, deviating from expectations based on mutational pressure. Phylogenetic analysis further confirmed that Zhuyeqi formed a highly supported monophyletic clade with cultivated types such as Pu-erh tea and Baihao tea, demonstrating close maternal genetic relationships. This study would provide important insights into the evolution of Theaceae species and the functional optimization of chloroplast genomes.

Camellia sinensis  /  Zhuyeqi  /  chloroplast genome  /  codon usage bias  /  phylogenetic analysis
Wenjuan ZENG, Qixiang ZHANG, Ning HE, Ya LIU, Yihui GONG, Zhiyin CHEN. Chloroplast Genome Characteristics and Evolutionary Analysis of the Tea Plant Variety Zhuyeqi[J]. Chinese Journal of Tropical Crops, 2026 , 47 (2) : 313 -324 . DOI: 10.3969/j.issn.1000-2561.2026.02.004
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Year 2026 volume 47 Issue 2
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Article Info
doi: 10.3969/j.issn.1000-2561.2026.02.004
  • Receive Date：2025-09-04
  • Online Date：2026-06-26
  • Published：2026-02-25
Article Data
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History
  • Received：2025-09-04
  • Accepted：2025-11-07
Funding
Affiliations
    1.College of Agriculture and Biotechnology, Hunan University of Humanities, Science and Technology, Loudi, Hunan 417000, China
    2.Innovation and Entrepreneurship Education Center for Horticultural Production and Processing in Hunan Province, Hunan University of Humanities, Science and Technology, Loudi, Hunan 417000, China
    3.Hunan Provincial Innovation and Entrepreneurship Demonstration Base, Hunan University of Humanities, Science and Technology, Loudi, Hunan 417000, China
    4.Key Laboratory of Characteristic Agricultural Resource Development and Quality Safety Control in Hunan Province, Hunan University of Humanities, Science and Technology, Loudi, Hunan 417000, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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