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Information × Registration Number 0220U104537, 0116U001106 , R & D reports Title The theoretical bases of alfalfa breeding and create a variety of high-productivity stable fodder, seeds, enhanced symbiotic nitrogen fixation, adapted to abiotic and biotic factors popup.stage_title Head Tyshchenko Olena D., Registration Date 22-12-2020 Organization The Institute of Irriiqated Aqriculture of the NAAS Ukraine popup.description2  Object of research: various selection material of alfalfa. The purpose of the research: to create a new selection material and evaluate it, to identify the best numbers in terms of drought resistance, winter hardiness, disease tolerance and productivity, and to transfer it to the WWTP. Research methods: vegetation-field with the use of sandy substrate with a minimum nitrogen content to study the nitrogen-fixing ability on the background of inoculation with nodule bacteria (Ekovital and AVM) on marker characteristics. The main method is field - to study the adaptive properties and genetic potential of forage and seed productivity of alfalfa samples in different breeding nurseries and different environmental gradient environments (irrigation, natural moisture). irrigated agriculture. Analysis of selection material for drought resistance showed that the most drought-resistant populations include 17/6, 15/4 and 64/35 for all calculated indices: DSI = 067- 0.79, TOL = 4.06-5.66, YSI = 0.65-0.70, STI = 0.75-0.80, YI = 115.3-130.7, MP = 13.34-13.77. Tissue flooding under irrigation conditions is mostly higher and ranges from 77.1-83.2% (third, fourth slopes) compared to conditions without irrigation 62.3-69.5 and 69.0-71%. However, the water holding capacity, on the contrary, is higher in plants grown in rainy conditions and with lower water losses on average for 1 hour 1.8-3.8 in the third and 1.4-3.8% in the fourth slopes. In the control nursery for the second year of life, the maximum forage productivity (14.28 - 14.63 kg / m2 of green mass or 2.60-2.66 kg / m2 of dry matter) was marked numbers 5/19, 13/19. In the control nursery, without irrigation, several samples were isolated according to the productivity of green mass, which exceeded the standard variety by 14.0 - 31.2% (the yield of the standard was 3.14 kg / m2 of green mass). In the selection nursery of the second year of life with grass, seed yield in the best numbers ranged from 0.45 to 0.64 t / ha with a yie Product Description popup.authors Tyshchenko Andrii V. popup.nrat_date 2020-12-22 Close