8th INTERNATIONAL WHEAT CONFERENCE

(1 scores – low hardiness; 9 scores – very high hardiness). For growing in the Kharkov area
the varieties possessing the degree of hardiness from 6 and higher scores are suitable.
It has been established that the sources of the most frost-hardy varieties are Russia,
Ukraine, USA. The highest degree of winter hardiness (8 scores accord to 9-scoring scale)
was shown by the varieties: Donskoi surpriz, Gubernia, Zernogradka 11, Dominanta,
Zhemchuzhina Povolzhya, Otrada of Siberia, Omskaya 6, Orenburgskaya, Kazanskaya
237 (Russia), Kryzhinka, Volodarka, Vasilina, Astet, Doskonala, Doridna, Belosnezhka,
Driada 1, Veselopodolskaya 2491, Lut.37-07, Lut. 760-05, Lut. 1201-07, Eritr. 583-06,
Eritr.1315-08 (Ukraine), KS 93 WGRC 26 (USA).
An over-mild resistance (7 scores) was shown by the varieties Yasochka, BOR-1,
Vesta,Polesskaya 104, Oktava, Povaga, Dalnitskaya, Podolyanka, Donetzkaya 16, Al’yans,
Rozkishna, Kharus, Antonovka, Turunchuk, Slavna, Mirlena, Krasen, Skarbnitsa
(Ukraine), Rodnik Tarasovskiy, Rostovchanka 3, Volzhskaya short-stemmed, Konkurent,
Tarasovskaya awned, Prestizh, Gubernator Dona, Lutescens 380, Lutescens 476,
Zernogradka 10, Masha (Russia), MV Matador, MV Mezefeld, MV Vilma (Hungary),
Podoima (Moldova), Alex (Romaniya), Bul. 5626.5.2 (Bulgaria), TX 97- A0219 (USA).
The largest duration of vernalization was shown by the varieties: Kryzhinka, Driada 1,
Vesta, Voronezhskaya 85, Kazanskaya 237 that points out to their stability to winter thaws
and ice crusts.
The majority of winter bread wheat varieties from France, Poland, Check Republic possesses
a high yield potential, but don’t have a sufficient degree of winter hardiness for the conditions
of the eastern part of Ukraine. They might be the sources of productivity in breeding
under the condition of strict control of winter hardiness in the process of selection.
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