In most areas of Guangxi，there are more rainy days in spring and autumn and the rainfall
is higher．This climatic conditions are beneficial to the survival and pathophoresis of Phytophthora infestans
and sporangium produced by late blight．This paper conducted resistance test for late blight on 16 large-fruit
tomato materials to screen Polymeric multi-resistant materials using field resistance identification and KASP
molecular marker technology．The results showed that 10 materials showed high resistant or resistant to late
blight in fields；3 materials contained late blight homozygous resistance gene Ph-3；2 materials contained
TYLCV homozygous resistance gene Ty-1；4 materials contained TYLCV homozygous resistance gene Ty-3；
10 materials contained Verticillium wilt homozygous resistance gene Ve-2．Besides，3 materials：LF-15，LF-
35，LF-41 had 4 resistant genes at the same time．Among them，LF-35 contained 4 resistant genes all being
homozygote．