THE GRAIN QUALITY CLASSIFICATION OF WINTER WHEAT GENETIC RESOURCE BY SULFUR AND NITROGEN

The aim of this paper is to determine the status of S (S content and the ratio of N: S) in the grain production and breedingof winter wheat in Kazakhstan. Material: 750 samples of winter wheat cuiltivars 20092014 harvest, wild relatives and introgressive forms. Regions of winter wheat cultivation in sulfur content ranged from 1130 mg/kg (at the level of the deficit) for Zhambyl and Taldy-Korgan to a maximum 1640 mg/kg for the Ily region and the ratio of N: S from 14.9 (Sairam) to 19.6 (Sarkand). The level of S accumulation in the wild relatives grain was for: Ae. Triaristata 2404-2565 mg/kg; Aegilopscylindricae 2164-2404 mg/kg; T. militinae 2190-2330 mg/kg; T. timopheevi 1841-2443 mg/kg; T. kiharae 2124-2205 mg/kg in comprasion with the cultivars in the range of 14521836 mg/kg. Introgressive form was characterized by S containing, intermediate between wild and cultivated forms and N: S ratio in these forms of its optimal for wheat bread (no more than 17: 1). Thus, the constant line can be adaptive resource of high protein and sulfur. Commercial and perspective cultivars of winter common wheat and regions of their cultivation are classified under the maintenance of sulfur (1005 up to 1818 mg/kg) and to balance N: S (from 13.6 up to 20.9).