Abstract: Biochemical component analysis and cluster analysis of the new tea variety Zijuan and its mutagenesis progeny were conducted. The results showed that the biochemical components of Zijuan tea in spring and summer were different, among which the largest coefficient of variation in the two seasons was anthocyanin content, both reaching more than 70%. By microsatellite markers for genetic diversity analysis, the results showed that compared with mutagenesis progeny, the genetic distance of Zijuan was more than 0.7, and the genetic distance between ZJ07 and ZJ15, the progeny of subcohort mutation, was more than 0.9. The results of biochemical component analysis and cluster analysis showed that Zijuan and its mutagenic progeny were rich in genetic diversity, especially in the content and coefficient of variation of tea polyphenols. The coefficient of variation of spring tea was 13.99%, and that of summer tea was 6.57%. Therefore, it can be concluded that the greater the genetic distance between samples, the higher the content of tea polyphenols.

Key words: tea tree species Zijuan, genetic distance, biochemical components, genetic diversity