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Abstract

In the North Kazakhstan Research Institute of Agriculture (Kokshetau EPF), highly productive varieties of perennial forage grasses have been cultivated,they are of high productivity of fodder mass and improved quality, they are resistant to unfavorable weather conditions, especially winter hardness, drought hardness, resistance to diseases and pests and that issuitable for multi-use in different regions of the republic. Khanshiime variable medic and Yellow sweet clover Kokshetau 14 are among them, they are cultivated by a relatively new method of selection, such as the polycross method with creation of a complex hybrid population with a high heterosis effect, the meaning of which consisted in broad and complete re-pollination on a different genetic basis, which ensured attracting various originalmaterials. At the same time, such a scheme of the selection process was used, which shortened the creation time of varieties for 8-10 years. A new variety of Khanshiime medic showed high productivity in terms of yield of green mass, the increase was +49 c / ha or 17.5% with a standard level of 279 c / ha. As regards the yield of air-dry matter, the excess over the standard was 16%. Seed productivity was at the level of 2.1 c / ha, the excess was 40%. A new variety of yellow sweet clover Kokshetau 14 showed high productivity in yield of fodder mass, exceeding the standard by the green mass by 11.3% and hat by 11.7%. It was distinguished by much higher seed productivity (exceeding the standard by 14.8%), winter hardness and drought hardness. The remaining parameters of economic-value traits were at the standard level. The results of variety trial on a farm scale of “Kolos-2014” LLP in Zerendinsky district of Akmola region showed the advantage of new varieties, both in terms of the green mass (11-12% excess) and seed productivity (exceeding by 2 times)