Welcome to Chinese Journal of Tropical Crops,

Chinese Journal of Tropical Crops ›› 2019, Vol. 40 ›› Issue (12): 2364-2368.DOI: 10.3969/j.issn.1000-2561.2019.12.008

• Crop Culture and Nutrition, Genetic Breeding • Previous Articles     Next Articles

Quality Traits Diversity Analysis of Mallotus oblongifolius Germplasm Resources

GU Wenliang1,2,ZHANG Jianyu3,QIN Yonglan4,ZHUANG Huifa1,2,WANG Hui1,2,ZHANG Cuiling1,2,TAN Lehe1,2,*()   

  1. 1. Spice and Beverage Research Institute, Chinese Academy of Tropical Agricultural Sciences, Wanning, Hainan 571533, China
    2. Key Laboratory of Genetic Resources Utilization of Spice and Beverage Crops, Ministry of Agriculture and Rural Affairs, Wanning, Hainan 571533, China
    3. School of Tropical Crops, Yunnan Agricultural University, Pu°er, Yunnan 665099, China
    4. Yangtze Normal University, Chongqing 408100, China
  • Received:2019-09-23 Revised:2019-10-08 Online:2019-12-25 Published:2019-12-20
  • Contact: TAN Lehe


The genetic diversity of five major quality traits including water extracts content, tea polyphenols content, free amino acid content, caffeine content and ammonia polyphenols ratio was analyzed by the principal component analysis and cluster analysis for 92 Mallotus oblongifolius germplasm resources from Hainan, China. The genetic diversity of the major quality traits of M. oblongifolius germplasms was abundant. The diversity index of the content of free amino acids was the highest, and that of the content of tea polyphenols was the second highest. The coefficient variation of the caffeine content was the highest, followed by the ammonia polyphenols ratio. The principal components analysis of the five quality traits revealed that the first two principal components accounted for 77.70% accumulation contribution rate, reflecting most of the information of the five traits. Based on the difference of the five quality traits between each resource, the 92 germplasms were divided into three groups. The third group had the best prominent antioxidant health care effect and the lowest caffeine content. It means that the third group could be used as a good material for breeding. Our results could provide a scientific basis for the utilization and breeding for excellent asexual strains of M. oblongifolius.

Key words: Mallotus oblongifolius (Miq.) Muell. Arg, germplasm resources, quality traits, genetic diversity

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