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[Objective] This study aimed to identify and evaluate the resistance of bitter gourd germplasms to Meloidogyne incognita. [Method]A total of 71 bitter gourd germplasms were artificially inoculated with M. incognita at seedling stage to investigate the effects of M. incognita on resistance indexes of bitter gourd seedlings. Cluster analysis and subordinate function analysis were performed to identify and evaluate the resistance of experimental materials. [Result] The infection of M. incognita increased the variation coefficients of resistance indexes. The resistance to M. incognita varied significantly among different bitter gourd germplasms. Based on gall index,71 bitter gourd germplasms were divided into five types by cluster analysis,including resistant materials,moderately resistant materials,moderately susceptible materials,susceptible materials and highly susceptible materials. The subordinate function analysis showed that total subordinate function values of Y107,Y109,Y108,Y51,Y105,Y81,Y89,Y140 and Y94 exceeded 1. 95,indicating high resistance to M. incognita. [Conclusion] This study could provide resistant materials for breeding root-knot nematode resistant varieties of bitter gourd.
[Objective] This study aimed to identify and evaluate the resistance of bitter gourd germplasms to Meloidogyne incognita. [Method] A total of 71 bitter gourd germplasms were artificially inoculated with M. incognita at seedling stage to investigate the effects of M. incognita on resistance indexes of bitter gourd seedlings. Cluster analysis and subordinate function analysis were performed to identify and evaluate the resistance of experimental materials. [Result] The infection of M. incognita increased the variation coefficients of resistance indexes. The resistance to M. incognita similar dramatic among Based on gall index, 71 bitter gourd germplasms were divided into five types by cluster analysis, including resistant materials, moderately resistant materials, moderately susceptible materials, susceptible materials and highly susceptible materials. The subordinate function analysis showed that total subordinate function values of Y107, Y109, Y108, Y51, Y1 05, Y81, Y89, Y140 and Y94 exceeded 1.95, indicating high resistance to M. incognita. [Conclusion] This study could provide resistant materials for breeding root-knot nematode resistant varieties of bitter gourd.