The resistance in hybrids(F_1) obtained from usingDwarf Yellow (provided with Tm-2nv gene) or Ohio MR-9 (provided with Tm-2~a gene) as parents was significantly higher than that of the check cultivar6613 in field conditions.

• 以矮黄(具有抗 TMV 的 Tm-2nv 基因)和俄亥俄 MR-9(具有抗TMV 的 Tm-2~a 基因)为亲本的 F_1,田间抗病性显著高于对照品种6613。