Welcome to Chinese Journal of Tropical Crops,

Chinese Journal of Tropical Crops ›› 2019, Vol. 40 ›› Issue (12): 2347-2355.DOI: 10.3969/j.issn.1000-2561.2019.12.006

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

The Selection of Superior Trees and Analysis of the Genetic Diversity of Forty Years Old Seedling Forest of Camellia vietnamensis

CHEN Jing,GUO Yujian,WANG Peixuan,WANG Hong,YANG Chengkun,ZHOU Kaibing()   

  1. Engineering Research Center of Selecting and Breeding New Tropical Crops Varieties, Hainan University, Ministry of Education, Haikou, Hainan 570228, China
  • Received:2019-05-28 Revised:2019-06-21 Online:2019-12-25 Published:2019-12-20
  • Contact: ZHOU Kaibing


In order to select superior trees and discuss the genetic diversity among the forest of the adult Camellia vietnamensis seedling trees, surveys and experimental studies about agronomic characters, economic characters and quality characters were carried out in 32 high-yielding seedling trees from 40-year-old forest at Baomeiling Nature Reserve in Hainan. Results indicated that 20 trees proved to be high yield and rich in oil content; meanwhile, the physical-chemical properties and the fatty acid content of the seed oil are essentially in accordance with the quality standards of Oil-tea camellia seed oil (GB/T 11765-2018). The analysis of cluster based on the difference of agronomic characters, economic characters, physical-chemical properties and the fatty acid component demonstrated that the 32 high-yielding seedling trees could be clustered specially into 6 clusters (r 2=0.932), 10 clusters (r 2=0.864) and 7 clusters (r 2=0.937). Each of the three cluster-analysis can distinguish the abundance between different genotypes, and the 20 superior trees can be clustered respectively into all in 6 clusters, 7 in 10 clusters and all in 6 clusters, thus all of the results above illustrated that abundant genomic diversity existed in seedling trees, especially in the aspect of the abundance and genotypes. In conclusion, the breeding efforts should aim to high and stable yields. There are ones which can be expected to be cultivated into superior strains such as Jinbo 5 and 23. The genetic diversity of C. vietnamensis is very high, and some rare germplasm resources can be discovered for breeding.

Key words: Camellia vietnamensis, old seedling forest, superior trees, genetic diversity, cluster analysis

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