Abstract
21 collection samples of leek were assessed to identify appreciable varieties for breeding and cultivation in the conditions of the North-Western region of Russia. The study was performed in 2015-2019 at the experimental field of the Pushkin laboratories of the Department of Genetic Resources of Vegetable Crops of N.I. Vavilov Institute of Plant Genetic Resources. We have found varietal differentiation in terms of growth, yield and biochemistry of the studied leek samples. The dynamics of leek growth identified an advantage in the number of leaves, the sheath diameter and the increase in plant mass in the Anika, Lincoln and Banditd samples in 2015-2016 and in the Gayia, Elefant and Malabare samples in 2018-2019, which provided a heavy yield.
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