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Acta Horticulturae Sinica ›› 2024, Vol. 51 ›› Issue (11): 2555-2564.doi: 10.16420/j.issn.0513-353x.2023-0733

• Genetic & Breeding·Germplasm Resources·Molecular Biology • Previous Articles     Next Articles

Construction of Tomato Leaf Curl New Delhi Virus Infectious Clone and Its Application in Evaluation for Melon Disease Resistance

LIU Liming1, GENG Yanfei1, HAO Fangmin2, KANG Baoshan1, WU Huijie1, GU Qinsheng1,*()   

  1. 1 Key Laboratory of Fruit Breeding Technology of Ministry of Agriculture and Rural Affairs,Zhengzhou Fruit Research Institute,Chinese Academy of Agricultural Sciences,Zhengzhou 450009,China
    2 Ningbo Key Laboratory of Characteristic Horticultural Crops in Quality Adjustment and Resistance Breeding,Ningbo,Zhejiang 315040,China
  • Received:2023-12-14 Revised:2024-08-20 Online:2024-12-12 Published:2024-11-25
  • Contact: GU Qinsheng

Abstract:

In this study,a tomato leaf curl New Delhi virus(ToLCNDV)melon isolate Haimen 6 (HM6)was used as template to obtain its infectious clone by tandem repeat fragment method,and its infectivity was examined in different crops. Meanwhile,the resistance of 25 Cucumis melo cultivars were evaluated. The results showed that whatever infectious clones containing 1.57-mer DNA-A tandem repeat (1.57A)and 1.43-mer DNA-B tandem repeat(1.43B),respectively,were co-infiltrated or the clone containing both 1.57A and 1.43B was directly inoculated with melon,and the infection rate of the plants could reach 100%. Infectious clones containing 1.57A and 1.43B,respectively,were co-infiltrated into other crops,and it was found that it could infect Nicotiana benthamianaSolanum lycopersicumCucurbita moschataCucurbita pepoLagenaria sicerariaCucumis sativus,and Luffa aegyptiaca,but could not infect Citrullus lanatus. Through resistance evaluation,it was found that 3 of the 25 tested melon materials showed resistance,3 materials showed susceptibility and 19 materials showed high susceptibility.

Key words: melon, tomato leaf curl New Delhi virus, infectious clone, infectivity, resistance