Welcome to Chinese Journal of Tropical Crops,

Chinese Journal of Tropical Crops ›› 2020, Vol. 41 ›› Issue (7): 1415-1419.DOI: 10.3969/j.issn.1000-2561.2020.07.018

• Plant Protection & Bio-safety • Previous Articles     Next Articles

Genetic Analysis of Resistance of Watermelon Cultivars ‘Heipi’ to Aphis gossypii

CHEN Qing1,2,3,4(),LIANG Xiao1,2,3,4,WU Chunling1,2,3,4,LIU Ying1,2,3,4,XU Xuelian1,2,3,4   

  1. 1. Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou, Hainan 571101, China
    2. Key Laboratory of Pests Comprehensive Governance for Tropical Crops, Ministry of Agriculture and Rural Affairs, Haikou, Hainan 571101, China
    3. Hainan Engineering Research Center for Biological Control of Tropical Crops Diseases and Insect Pests, Haikou, Hainan 571101, China
    4. Hainan Key Laboratory for Monitoring and Control of Tropical Agricultural Pests, Haikou, Hainan 571101, China
  • Received:2019-10-15 Revised:2019-11-01 Online:2020-07-25 Published:2020-08-24


To get stable resistant watermelon cultivars, the genetic analysis of the resistance of watermelon cultivar ‘Heipi’ to Aphis gossypii was proceeded by the ratio of aphid number at seedling in a greenhouse added with RAPD and SCAR. The reciprocal-hybrid F1 of ‘Heipi’ and ‘Hualv’ was resistant while the resistant and susceptible plants in F2 hybrid fitted the separation ratio of 3:1 by χ 2test. Four resistant cultivars, four susceptible cultivars, ten resistant F2 single plants and ten susceptible F2 single plants were verified with screened RAPD WO4600 and SCAR WO4-S530. The results indicated that the resistance of the parent ‘Heipi’ to A. gossypii was controlled by a dominant single gene which was stably inherited, ‘Heipi’, ‘Lvmeiren’, ‘Heimeiren’ and ‘Huilan’ were aphid-resistant cultivars, ‘Hualv’, ‘Fengguang’, ‘Huibao’ and ‘Tianmeiren’ were aphid-susceptible cultivars.

Key words: watermelon cultivars, Aphis gossypii, aphid-resistance, genetic analysis

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