Frost hardiness of Iraqi wheat genotypes

الملخص EN

Frost hardiness level in winter cereals is especially temperature dependent.

The low temperature which kills 50% of plants (LT50) is considered to be a standard indicator of frost hardiness level of plant.

Frost hardiness is considered the most important parameter for the field survival which is the ultimate measure of winter-hardiness of a cultivar.

This study aimed to determine the genetic level of frost hardiness of five Middle Eastern varieties (Abu-Ghraib, Fatah.

IP A 95, IP A 99, and Sham 6) in comparison to the European cultivar (Claire).

All of the Middle Eastern varieties tested showed very similar LTso’sin the non-acclimated state, whilst when of acclimated they responded in different ways to freezing temperatures.

Abu-Ghraib and Claire showed more tolerance than the other cultivars.