Frost resistance of winter common wheat varieties under different hardening conditions

Dimitrina Nikolova, Tatyana Petrova, Galina Mihova

Abstract: During 2016-2019, 20 winter common wheat varieties were investigated in order to establish their frost resistance in different nature conditions to hardening in autumn-winter period. The plants were grown in vegetation plates under natural conditions and then the plants were frozen in freezing chambers to critical low temperatures. The percentage of survival was registered. The varieties were grouped by cluster analysis. It was found that, no matter the different meteorological conditions in autumn-winter period in the three years of investigation, the varieties retain their space compared to standard scale varieties. The highest degree of frost resistance showed Pchelina and Milena, and the lowest has Toskani. Most of the varieties showed moderate to high frost resistance which is absolutely satisfactory for our climatic conditions. Yantar, Anapurna, Andalou and Toskani varieties are an exception. They are under risk of freezing by very low temperatures, if the nature conditions are not good enough for hardening.

Keywords: frost resistance; hardening conditions; winter common wheat

Date published: 2021-06-24