Phytocenotic paradigm in the breeding of the russian wildrye (psathyrostachys juncea) in the south of Middle Siberia

At the first stages of selection of the cholece collar, the best genotypes from the wild phytocenosis were identified and selected, which meet the objectives of breeding according to a complex of traits: plant height, number of generative shoots, number of seeds per plant, bush capacity and other traits. The selection criteria were statistical indicators: the dispersion of features and the nature of the distribution of its frequencies. When selecting biotypes for 2015-2018 in the nursery of the source material, laid down in the dry steppe agro-ecological area. Significant variation variability was noted in such a sign as seed weight per plant: coefficient of variation - 48.82 to 94.65% for numbers such as K5; K9 and K12. The average height of plants for three years in the nursery of the source material after overwintering was 14.8-18.6-15.1 cm. Among the selected numbers, plants with high grass stand prevail: K2 - 20.2 cm; K6 - 22.0 cm; K9 - 20.6 cm; K20 - 24.7 cm. In the earing phase, the highest plant height in biotypes K2 is 123.4 cm; K11 - 124.7 cm; K12 - 122.4 cm. The noted differences in the growth dynamics can be explained by the hereditary reaction of plants to fluctuations of environmental factors. Plants with a stable high gain, trapped in a selection sample, can be considered as individuals with well-developed homeostasis, providing relative autonomy from environmental conditions. According to the yield of green mass, samples were selected: K1; K2; K3; K5; K9, K11, K12 - from 470 g to 560 g; dry matter the same samples - from 100 g to 120 g. When using the pasture mode (imitation of mowing), 3-4 fold mowing of grass is permissible. The following samples were selected for the complex of economically valuable attributes: K1; K2; K3; K5; K9; K11; K12.

ломкоколосник ситниковый, массовый отбор, селекция, исходный материал, агрофитоценоз, дикорастущие популяции, селекционные образцы, Russian wildrye, Psathyrostachys juncea, mass selection, selection, source material, agrophytocenosis, wild-growing populations, selection samples