Selection of parental pairs when obtaining FI hybrids of white cabbage with resistance to the tip burn of the inner leaves

Relevance. During the formation of cabbage heads, under certain conditions, white cabbage is damaged by a burn ofthe top of the inner leaves of the head, which abroad received the stable name “tip burn”. This disorder is interpreted as a physiological or non-infectious disease, the cause of which is a violation of calcium intake. The disease manifests itself inside the cabbage head, resulting from the interaction of environmental stress factors and the predisposed genotype. The most effective way to combat this disorder is to develop highly tolerant hybrids. This is especially true for the south of Russia, where the stress load on plants is maximum. Purpose of the study to develop a principle for selecting parental pairs for developing hybrids that are resistant to the tip burn of the inner leaves of a cabbage head, and to identify promising hybrids.