Abstract
Alfalfa is a valuable high-protein fodder crop suitable for the preparation of various types of feed (green mass, hay, haylage, silage). Due to the increasing aridity of the climate, there is a need to expand its crops in the northern regions of the country. Currently, it is necessary to create alfalfa varieties with a good adaptation to modern environmental conditions, to improve the development of seed production of this crop. Often alfalfa plants are highly susceptible to disease damage, damage by pests. Fungal diseases (fusarium, brown spotting) during the epiphytotic period can also reduce the productivity of alfalfa herbage and its quality by 30% or more. Methods of selection, polycross, and hybridization were used to create a fusarium-resistant, brown-spotted alfalfa source material. Long-term work has made it possible to identify and create sources of alfalfa resistance to these diseases. In breeding nurseries, the most promising samples for further breeding were P 67 (2), LG 2, SU 9032, No. 27, No. 28, SU 85. In the competitive test and the control nursery, the best according to the results of the previous years (2014–2020 and earlier), samples of SGP 387, SGP 12, C 63-11 can be considered superior to the standard in productivity by an average of 15%, resistance to fusarium, brown spotting by 15–25%.
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