COMPREHENSIVE ASSESSMENT OF WINTER WHEAT-WHEATGRASS HYBRIDS BY CROP STRUCTURE ELEMENTS AND BREEDING INDICES

In order to select the best forms in breeding practice, the analysis of lines according to breeding indices is widespread, which makes it possible to identify samples according to the complex of studied characteristics against the background of certain soil and climatic conditions. The article presents data on the assessment of winter wheat-wheatgrass hybrids from the collection of the Distant hybridization department of the MBG RAS by crop structure elements and breeding indices for 2022–2024. On average, over the years, the height of plants ranged from 75.1 to 102.5 cm, the length of the ear – from 8.3 to 10.8 cm, the number of grains per ear – from 26.7 to 48.5 pcs, their weight – from 1.47 to 3.24 g per ear, the weight of 1000 grains – from 44.1 to 58.6 g, biological yield – from 513.5 to 1232.5 g/m2. Nine samples were identified according to the Finnish-Scandinavian index, three according to the Mexican index, and ten according to the Canadian index. The value of the linear density index of the ear above 4 pcs/cm had twenty-one lines, four lines were distinguished in relation to the size to the number of grains in the ear. Three lines had the highest productivity index. According to the totality of all the signs, the best lines were identified: WWH 43, WWH 49, WWH 50, WWH 51, WWH 57 and WWH 90. These samples are recommended for further study and management of the breeding process.