The change of architectonics of plants helps to optimize an optical-crop biological structure and to form the new morphological features of plants designed to increase the yield of crops. The changes of architectonics of an ear plant of winter rye to improve a performance of culture are grounded theoretically. It is proved that polystaching is one of the possible ways to improve plant productivity. Ramification of a rod ear makes it possible to increase the number of ears in the inflorescence and flowers and seeds according to the plant. The results of monitoring of cultural plant populations of winter rye resulting in isolated samples of the branched structure of the ear are shown. Polystachyres form received in the creation of candidates for sterility fixers of rye varieties through a hybridization with domestic and foreign lines of hybrids. The selected sample 19–5 is analyzed by the major phenotypic characteristics. The studies found that an isolated polystachyres form has several agronomic traits, the main of which is higher than the grade-standard offering. Sample 19–5 should be used in breeding research as a donor of polystaching, short-stemming, increasing the length of the ear, number of grains in the ear and ear weight and grain, respectively, from the plant
