Nosenko Y. Nectar-productivity of Medicago sativa, her nature and means in the selection of high - seed productivity grades

Medicago sativa. Studying of variability indication "nectar-productivity of the plant", her nature and possibilities of using in high-seed setting breediny work by the conditions insufficiend bee - pollination. Testing of nectar productivity - by the method of centrifugating (laboratory clinic centrifuge OPK-3). Mathematic analysis - methods of Turbina, Hotileyva, Tarutina and Jinks-Heyman-Desaureaus.Methods of field investigation - generally accepted. It was improved metohod testing by the "nectar-productivity of the plant", it was established the level of variability its indication, corellation relations with indications seed-productivity, her genetic nature and possibility paralelle improving by the complex indications. It was created population - syntetic with high seed - productivity, and isolated donor matherial (high - and low nectarity lines) - №1, №3. It was passed the hybrids examples №2,№4,№5,№7 for the creaction high - productivity grades on the Poltava research station, population-syntetic including in the concurs grade-competition. Artifically created population took addition of the harvest of honey 0,46 c/ha and seed 0,36 c/ha. Agriculture