ИНДИВИДУАЛЬНЫЙ И ИНДИВИДУАЛЬНО-СЕМЕЙНЫЙ ОТБОР НА КОРОТКОСТЕБЕЛЬНОСТЬ КАК МЕТОД СОЗДАНИЯ НОВОГО СЕЛЕКЦИОННОГО МАТЕРИАЛА ОЗИМОЙ РЖИ

Abstract

Modern composition of diploid winter rye is represented mainly by hybrid varieties, and in spite of high productivity level, good baking qualities of flour, resistance to diseases and lodging, most of them are split according to plant height, which leads to uneven crops. A long-term study of the material selected for seed production has shown that plants of the same height of the spike-bearing stem differ in length of internodes. The length of the upper internode varies most considerably from 20 to 45 cm, and selection of plants with lower parameters of this feature leads to a decrease of the overall plant growth and increases resistance to lodging. Research work was carried out at Novozybkovskaya Agricultural Experimental Station - a branch of the Federal Research Center “Federal Scientific Center of Feed Production and Agroecology named after V.R. Williams “ in 2012-2019; Novozybkovskaya 150 winter rye variety was under study. The presence of the source of dominant short-stemming (k-10028) in the synthetic population of the initial material made it possible to carry out multiple selections with an intensity of 2 b according to the planned traits. The method of annual sequential exclusion of plants with a height of more than 120 cm, with a lower internode length of 5-7 cm and an upper one over 35 cm from the seed material formed a fairly constant form of a short-stemmed (up to 120 cm) population with a lower internode of 1-4 cm - 97%, with the upper - up to 30 cm - 50%. Family material combined according to the height of the stem showed high resistance of this trait in seed-plot testing. A long-term cycle of targeted individual selection for short stems increased the number of productive stems to 16 pcs. with grain mass of 2.0-3.0 g per ear. Self-pollination reduced the number of spike-bearing stems to 3-6 pcs., the weight of grain per spike was 2.6-3.5 g. The combination of short stemming, increased bushiness, and different types of spike gives a variety of material and is of great interest for winter rye selection