对外番茄杂交制种是一项利国利民的高效创汇农业。外商对种子质量要求特别严格,特别是纯度,必须达到98%以上才能达到质量标准。近一两年,由于种种原因,番茄又开始出现纯度低不达标的现象,既影响了收入,又降低了生产单位的信 Tomato hybridization is a foreign profit efficient foreign exchange earning agriculture. Foreign countries are particularly strict on seed quality requirements, especially purity, which must reach over 98% to meet the quality standards. In recent one or two years, due to various reasons, the phenomenon of low purity and non-compliance of tomatoes started to occur again, which not only affected income but also reduced the production unit’s letter