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Acta Horticulturae Sinica ›› 2021, Vol. 48 ›› Issue (9): 1717-1730.doi: 10.16420/j.issn.0513-353x.2020-0926

• Research Papers • Previous Articles     Next Articles

Genetic Diversity Analysis and Multivariate Evaluation of Cherry Tomato by Phenotypic Traits in South China

LI Yanhong, NIE Jun, ZHENG Jinrong*(), TAN Delong, ZHANG Changyuan, SHI Liangliang, XIE Yuming   

  1. Institute of Facility Agriculture,Guangdong Academy of Agricultural Sciences/Key Laboratory of Urban Agriculture in South China,Ministry of Agriculture and Rural Affairs,Guangzhou 510640,China
  • Received:2020-11-05 Revised:2021-05-06 Online:2021-09-25 Published:2021-09-30
  • Contact: ZHENG Jinrong E-mail:zhengjinrong@gdaas.cn

Abstract:

In this study,the cluster analysis,principal component analysis,and multivariate evaluation of 26 phenotypic traits were carried out to evaluate the genetic diversity of 110 cherry tomato germplasm resources in South China. The results showed that high variation,phenotypic diversity,and genetic diversity were assessed in the 110 cherry tomato germplasm resources. The genetic diversity index of 26 phenotypic traits ranged from 0.33 to 2.04. The highest genetic diversity index was detected for the glucose/total soluble sugar(2.04). The mean value of the variation coefficient of the 19 quantitative indexes was 31.41%,and the highest variation coefficient was observed in lycopene content(80.41%). The 110 cherry tomato resources were divided into five groups by systematic clustering. The germplasms in groupⅠimplied the good potential for genetic improvement. The germplasms in group Ⅲ could be mainly used for the selection of flavor breeding genotypes of cherry tomato. The germplasms in groupⅤcould be mainly used for the selection of functional breeding genotypes of the cherry tomato. The principal component analysis and comprehensive evaluation indicated that the cumulative contribution rate of the nine main components was 75.512%. The first and third principal components mainly reflected the fruit quality of the cherry tomato. The second and fourth principal components mainly reflected the appearance quality of the cherry tomato fruit. The fifth and sixth principal components mainly reflected the growth characteristics of the cherry tomato plant. The comprehensive score of the germplasms ranged from -1.548 to 1.460. The five germplasms with high comprehensive scores were ct092,ct028,ct018,ct090,and ct017 which could be used as the core breeding resources.

Key words: tomato, cherry tomato, germplasm resources, genetic diversity, cluster analysis, multivariate evaluation

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