VITREOUSNESS OF GRAIN OF SPRING HARD WHEAT IN CONDITIONS OF THE NORTH OF THE ROSTOV REGION
The research was carried out to evaluate spring durum wheat varieties by grain vitreous content and to search for genotypes with high and stable vitreous values. Data on the vitreous content of spring durum wheat grain for 2016-2020 are presented. The average vitreous index was 87.4%. The variation in varieties was observed from 84.2% in 3730 h 76 to 90.2-92.6% in Novodonskaya, Melodiya Don, Donela M and Volnodonskaya. The differences between the extreme options were 8.4%. The variation over the years was observed from 57 to 100% with a range of variability from 19% (Donela M) to 38% (D-2150). The calculation of the coefficient of variation showed that the degree of variability of the trait varies from very weak to weak. The coefficients of variation ranged from 1.7 for Don's Melody to 8.4 for 326 d 5 and Donela M. In the course of research, it was found that the value of the correlation coefficient of vitreous with yield varies depending on the conditions of the year. At the same time, in most cases, it increased in a more arid climate. A positive correlation of vitreous content with yield (r=+0,15-+0,66), with the content of protein and gluten is insignificant, and only in the average year for the formation of vitreous, the relationship is average positive. It is proved that as a starting material, it is possible to use varieties with a relatively high and more stable vitreous - Nikolasha, Lilek, 311 d 50-2 and with maximum vitreous - Volnodonskaya, Melodiya Dona, Donela M, Novodonskaya.