Acta Agriculturae Zhejiangensis ›› 2024, Vol. 36 ›› Issue (7): 1591-1601.DOI: 10.3969/j.issn.1004-1524.20231037

• Horticultural Science • Previous Articles     Next Articles

The diversity of tea germplasm resources and genetic relationship of ‘Tieguanyin’-derived varieties in Anxi, Fujian, China

ZHU Yanyu1(), YU Wentao2,*(), GAO Shuilian3, LYU Shuiyuan2, WANG Pan1, JIN Wanmin3, GUI Wenjing1, LIN Yi1, YE Naixing1,*()   

  1. 1. College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou 350002, China
    2. Fujian Key Laboratory for Technology Research of Inspection and Quarantine, Technology Centre of Fuzhou Customs District, Fuzhou 350001, China
    3. Anxi Tea College, Fujian Agriculture and Forestry University, Fuzhou 350002, China
  • Received:2023-08-31 Online:2024-07-25 Published:2024-08-05

Abstract:

In order to better protect, evaluate and utilize Anxi tea germplasm resources, the genetic diversity of Anxi tea germplasm resources and the genetic relationship of ‘Tieguanyin’-derived varieties were analyzed by single nucleotide polymorphism (SNP) molecular marker technique. Principal coordinate analysis, hierarchical clustering tree analysis, population structure analysis and genetic distance analysis were carried out.The DNA fingerprinting of ‘Tieguanyin’ and its derived varieties were also constructed, and their genetic similarity coefficients were calculated. The results showed that a total of 53 high polymorphic loci suitable for genotyping of Anxi tea germplasm resources were screened out. The average observed heterozygosity was 0.322, and the average expected heterozygosity was 0.281, indicating that Anxi tea plant germplasm resources had rich genetic diversity. The genetic distance between tea populations in the four townships of Anxi was 0.068-0.269. The tested samples could be divided into two groups. Group I mainly included tea plant germplasm resources from Xiping, Huqiu and Hushang, with frequent exchanges among germplasm resources. Group Ⅱ was mainly composed of wild-type landrace tea germplasm resources in Futian, and the tea plant germplasm resources in Futian were relatively concentrated and independent. DNA fingerprinting could accurately identify ‘Tieguanyin’ and its derived varieties. ‘Tieguanyin’-derived varieties had rich diversity, among which ‘Tieguanyin’ had a large genetic similarity coefficient with ‘Jinmudan’, ‘Zimeigui’ and ‘Xinxuan 211’. In summary, the diversity of tea plant germplasm resources in Anxi County was rich, ‘Jinmudan’, ‘Zimeigui’ and ‘Xinxuan 211’ had higher genetic similarity with ‘Tieguanyin’.

Key words: Anxi, ‘Tieguanyin’-derived variety, Camellia sinensis, germplasm resource, genetic diversity, single nucleotide polymorphism

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