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Journal of Tea Science ›› 2023, Vol. 43 ›› Issue (4): 473-488.doi: 10.13305/j.cnki.jts.2023.04.008

• Research Paper • Previous Articles     Next Articles

Diversity Analysis of Leaf Phenotype and Biochemical Components in Tea Local Population Resources

TANG Lu, LI Changle, GE Yue, WANG Pu, ZHAO Hua, WANG Mingle, WANG Yu, GUO Fei*, NI Dejiang   

  1. National Key Laboratory for Germplasm Innovation & Utilization of Horticultural Crops, College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan 430070, China
  • Received:2023-05-06 Revised:2023-07-17 Online:2023-08-15 Published:2023-08-24

Abstract: In order to protect tea germplasm resources and promote tea germplasm innovation, the phenotypic character and biochemical component diversity of 32 tea germplasm resources from 12 provinces were studied. The results showed that the genetic diversity index of 16 phenotypic character ranged from 0.81 to 1.94, and the phenotypic genetic diversity of the test population was high. The cumulative contribution rate of the six phenotypic characters including leaf area, leaf shape, leaf upper surface, young shoot pubescence, leaf tip shape and leaf cross section were 71.78%, which was the main factor causing the phenotypic difference of the tested tea population. Based on the determination results of biochemical components in two years, the variation coefficient of caffeine content (17.95% and 14.55%) was the largest, followed by the variation coefficient of tea polyphenol content (13.61% and 8.11%). The variation coefficient of free amino acid (5.62% and 7.52%) was the lowest. Cluster analysis based on the results of biochemical component content determination was conducted to divide the tested tea tree populations into three groups, each including different types of germplasm. From the geographical distribution of the tested tea populations, the content of biochemical components showed regional differences.

Key words: tea local population species, phenotypic character, biochemical components, diversity

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