Determination of Optimum Cold Acclimation Period under Controlled Conditions and Winter Resistance of Some Winter Wheat Genotypes

Year 2025, Volume: 11 Issue: 2, 76 - 85, 31.07.2025

Ümran Küçüközdemir , Dilşad Gülen Köksal Karadaş Murat Olgun

Abstract

The fact that climate conditions that will cause winter damage do not occur every year in the locations where wheat
breeding studies are carried out poses an obstacle to selection in terms of cold resistance in breeding material. The
research was planned and carried out to carry out the selection in question in a short time and clearly. 135 different bread
wheat genotypes were acclimated to cold for 0, 21, 35 and 49 days using Hoagland solution under controlled conditions,
and at the end of these periods, genotypes with high survival rates were identified by testing them to temperatures of -3,
-5, -7, -9, -11 and -13°C. At the same time, the survival rates of the genotypes under the shelter where snow cover was
prevented were also determined. It was revealed that the temperatures between -3°C and -13°C and the cold acclimation
periods linearly affected the survival rates of the genotypes and the winter hardiness increased as the cold acclimation
period increased. In the winter resistance studies to be conducted using Hoagland solution in wheat, it was determined that
a 49-day cold acclimation period was appropriate and the maximum test temperature was -13°C. As a result of the study,
it was decided to eliminate 97 genotypes from a total of 135 genotypes, which had high yields but low winter hardiness,
before they were taken to the next breeding stage. Thus, 60% savings were achieved in terms of labor, time and other
costs in the studies.

Keywords

Cold acclimation , hoagland solution , wheat , winter hardiness

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