EVALUATION AND INHERITANCE OF REACTION EX PRESSIVITY TO TEMPERATURE AND LIGHT FACTORS IN BARLEY (HORDEUM-VULGARE L) - REACTION TO LIGHT QUALITY

On the basis of changes in the length of ontogeny stages, i.e., vegeta tive and generative sphere formation and the maturing of reproductive organs, the expressivity of reactions to light quality, short day, ele vated growing temperature, and low light intensity in 83 spring barley varieties (Hordeum vulgare L.) was determined. Plants responded to fa ctors studied at different stages of ontogeny. A unified evaluation sy stem of reaction expressivity to temperature and light factors is sugg ested. In particular environments, the length of plant vegetation and their adaptivity depend on genotypic variation in the expressivity of these reactions. Data on the inheritance of expressivity of barley rea ctions to light quality are discussed.