The invention relates to a method for screening
mycosphaerella melonis-resistant IL 14 of cucumber-pickled cucumber
introgression line. According to batch treatment of different concentrations, plants with good resistance are screened, and the method belongs to the field of
biotechnology breeding. The method comprises the following steps: by taking
wild species pickled cucumber as a female parent, cultivating cucumber 'Beijing jietou' as a male parent, and hybridizing to obtain
hybrid F1; combining the
hybrid F1 with a somaclone variation
chromosome reduplication technology by virtue of
embryo rescue, thereby obtaining a fertile inter-specific
heterologous tetraploid new species which is named as
Cucumis hytivus; and by taking the
heterologous tetraploid new species
Cucumis hytivus as a female parent, performing
system backcrossing and self-cross
selective breeding with the cultivated variety 'Beijing jietou', thereby obtaining 86 parts of cucumber inter-specific
introgression line materials carried with
wild species chromosome segments, and respectively
numbering as IL1-IL86. The 86 parts of
introgression line groups are screened by adopting the
greenhouse seedling stage artificial
inoculation identification technology, stable moderate resistance or more strains are obtained by virtue of
inoculation treatment in spring and autumn, the
inoculation treatment is performed by increasing the concentration of bacterium, and the
mycosphaerella melonis resistance strain IL14 is screened.