H. M. Hospodarenko
S. P. Poltoretskyi
V. V. Liubych
N. V. Vorobiova
I. F. Ulianych
M. M. Kapriy
The results of the study on hardness and strength of caryopsides of different varieties and strains of spelt wheat are shown. It is determined that the strength of caryopsides of spelt wheat varies significantly depending on the variety and strain. The effort required for the caryopsis destruction by compression changes from 78.1 to 119.7 H. Grain of spelt wheat of Zoria Ukrainy variety and LPP 1224, LPP 1224, NAK34/12–2 and NAK 22/12 strains is characterized by high strength. The effort required for the caryopsis destruction by shearing varies in a smaller range, from 27.3 to 37.3 H. However, grain of studied varieties belongs to the soft-grainy type of hardness as an index of particle size ranges from 30.0 to 57.2 %.
The effort required for the caryopsis destruction by compression for spelt wheat grain of Schwabenkorn, Shvedska 1 and NSS 6/01 varieties changes from 90.5 to 94.2 H, significantly less than the check variant. The studied parameter for grain of strains obtained by hybridization of Tr. aestivum/ Tr. spelta varies from 78.1 to 100.8 H with the variation coefficient of 6–21 %. Grain of introgressive strain TV 1100 has the compression index of 80.3 H with the variability from 65.7 to 94.1 H (V=11 %). The highest indicator of the effort after compression is observed in grain of strains obtained by hybridization of Tr. aestivum/ amphiploid (Tr. durum/ Ae. tauschii) and Tr. kiharae – NAK34/ 12–2 and NAK 22/12 which varies from 104.2 to 119.7 H (V=13–17 %).
The effort required for the caryopsis destruction by shearing is lower compared with compression but it also changes depending on the variety and strains. Thus, this indicator of spelt wheat grain of Zoria Ukrainy variety (st) is 31.5 H with the variability from 26.5 to 38.2 H (V=13 %).
Key words: spelt wheat, type of hardness, index of particle size, strength of caryopsis.