Morphobiological and economically valuable fea- tures of samples from the modern collection of trititrigia (xTrititrigia cziczinii Tzvel.) MBG RAS.

Relevance. Trititrigia (×Trititrigia cziczinii Tzvel.) this is a new synthetic grain feed crop. The modern collection of the Department of Remote hybridization of the GBS RAS has more than 250 promising samples with a number of economically valuable features. The unique ability of trititrigia in one year to produce a stable yield of high-quality grain (3.0-3.2 t/ha) and nutritious green fodder (27.7-35.1 t/ha) allows us to recommend it for cultivation in regions with unfavorable cultivation conditions for grain crops. Promising samples should be used as donors of valuable traits in breeding for quality and adaptability in order to obtain modern high-quality and adaptive wheat varietiesMaterial and methods. The research was carried out in the Department of Remote Hybridization of the N.V. Tsitsin Main Botanical Garden of the Russian Academy of Sciences (Moscow region, village of Rozhdestveno) in 2008-2016. The objects of research were: promising long-term and grain-feed lines of trititrigia of the collection of MBG RAS. All samples of trititrigia were obtained in the department of distant hybridization in different years.Results. As a result of the research, it was found that the studied samples are stable lines with a characteristic feature for trititrigia to ripen from top to bottom, the ability to grow in one place for 2- 3 years under favorable conditions, as well as the ability to regenerate after harvesting for grain or mowing for green mass, unique for cultivated cereals. The studied samples have a productive bushi- ness of 8-20 stems per plant. The length of the main ear consistently exceeds the Moscow winter wheat standard 39 and averages 12-13 cm, in which 41 to 97 grains are formed. The grain yield in the competitive variety testing during the research was 3.2-4.1 t/ha, the mass of 1000 grains was 30.1-39.8 g. The Pamyati Lubimovoy variety, selected for a number of economically valuable characteris- tics, passed State registration and became the first trititrigia variety registered in the territory of the Russian Federation.