关键词: 武夷名丛, 种质资源, 矿质元素, 主成分分析, 聚类分析

Abstract: In order to investigate and evaluate the characteristics of mineral elements in Wuyi Mingcong tea plant germplasms form Wuyi mountain tea area, the content of 18 mineral elements in 28 Wuyi Mingcong tea plant germplasms were determined by ICP-OES and analyzed by factor analysis and cluster analysis. The results showed that: there were abundant genetic variations among the 28 Wuyi Mingcong tea plant germplasms in the content of mineral elements. The average contents of 18 mineral elements were followed by the order of K>P>S>Mg>Ca>Mn>Al>Fe>Na>Zn>Cu>Ba>B>Ti>Ni>Cr>Co>Se. The coefficient of variation was ranged from 12.65% (P) to 47.86% (Fe) and the genetic diversity index was ranged from 1.66(Ti) to 2.47(Ca). Contents of Ca, K, P, S, Al, B, Na, Cr, Cu, Mn, Se, Zn obeyed the normal distribution and contents of Mg, Ba, Co, Fe, Ni, Ti obeyed skew distribution by W test. Correlation analysis showed that there was a complex correlation among these elements. The 28 Wuyi Mingcong tea germplasm samples were divided into 3 groups by cluster analysis. The result of factor analysis showed that Al, Fe, Cu, P, Mg and Co were the characteristic elements of Wuyi Mingcong tea germplasm, and 6 principal components were attributed from 18 mineral elements traits, which covered 78.30% message of 18 kinds of mineral elements .The top five Wuyi Mingcong tea cultivars for synthesis scores were followed by the order of ‘Shiru’, ‘Xiaohongpao’, ‘Dahongpao’, ‘Zuiguiji’ and ‘Xiangtianmei’, which could be used as good materials in Oolong tea plant cultivating. Our results could provide a scientific basis for the utilization of Wuyi Mingcong tea germplasms, new variety breeding and product developing of Oolong tea.

Key words: Wuyi Mingcong, germplasm, mineral element, principal component analysis, cluster analysis