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There was formed trait collection of inbred maize lines for resistance to diseases, which includes 94 breeding lines bred in Transcarpathian Agriculture Experimental Station belonging. There were highlighted 32 samples with a high resistance to stem and root rots, 9 samples with high resistance to Helmintosporium northern blight. Highly resistant to pathogens of stem and root rot and smut diseases were 24 samples including ZK 146, ZU 86/6, ZKM 200, ZK 309/1 and others. The group of highly resistant to Helmintosporium northern blight and smut diseases includes 4 samples with the productivity from 73 to 104 g/plant, namely: ZK 296, ZK 300, ZU 85/3 and ZKCH 36/1. High resistance to four diseases - stem and root rots, Helmintosporium northern blight, head and common smut - characterized the samples ZK 351, ZK 301/1, ZK 312/1, ZK 24 with the productivity from 57 to 90 g/plant and different maturity times.