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Acta Agron Sin ›› 2013, Vol. 39 ›› Issue (11): 2000-2008.doi: 10.3724/SP.J.1006.2013.02000

• CROP GENETICS & BREEDING·GERMPLASM RESOURCES·MOLECULAR GENETICS • Previous Articles     Next Articles

Genetic Diversity of Tea Germplasm Resources in Yunnan Province Based on Phenotypic Characteristics

JIANG Hui-Bing,SONG Wei-Xi,YI Bing,LI You-Yong,MA Li,CHEN Lin-Bo,TIAN Yi-Ping,DUAN Zhi-Fen,LIU Ben-Ying,LIANG Ming-Zhi*   

  1. Tea Research Institute, Yunnan Academy of Agricultural Sciences / Engineering Research Centers of Tea Germplasm Resources Innovation and Its Matching Cultivated Techniques, Menghai 666201, China
  • Received:2013-02-18 Revised:2013-06-09 Online:2013-11-12 Published:2013-08-15
  • Contact: 梁名志, E-mail: liangmingzhi@126.com

Abstract:

We analyzed and compared the genetic diversity of main phenotypic characteristics in 830 tea germplasm, from ten different areas in Yunnan Province. The results showed Section Thea had the rich genetic diversity, the diversity index of descriptive traits was 0.64–1.40, with the average of 1.04, and relatively higher in young shoot color, the lowest in leaf base shape; the diversity index was 0.76–0.99, with the highest in Honghe prefecture, the second in Lincang and Wenshan prefectures, the lowest in Zhaotong prefecture. The variation coefficient of numerical traits was 10.27%–48.14%, with the average of 26.43%, and relatively higher in the ratio of polyphenol to amino acid, and the lowest in water extract; the variation coefficient was 16.09%–25.75%, with the highest in Wenshan and Honghe prefectures, and the lowest in Zhaotong and Dali. The genetic diversity and variation coefficient showed a tendency of Southeast>West>Northeastern in phenotypic characteristics. By cluster analysis, tea germplasm resources from ten regions was divided geographically into three groups, Zhaotong and Honghe for each group respectively, others for the third group. The results demonstrate an obviously ecogeographical differentiation among Southeast, West, and Northeast areas of tea germplasm in Yunnan, and Southeast is the distribution center with genetic diversity in phenotypic characteristics.

Key words: Section Thea, Germplasm resource, Phenotypic characteristics, Genetic diversity, Yunnan Province

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