Tomato powdery mildew caused by Oidium neolycopersici has become a globally important disease of tomato (Lycopersicon esculentum). To study the defense responses of tomato triggered by tomato powdery mildew. we first mapped a set of resistance genes to O. neolycopersici from related Lycopersicon species. https://www.parisnaturalfoodes.shop/product-category/msm-glucosamine/