ارتباط اقلیم و نیاز بهاره سازی در اکوتیپ های Hordeum spontaneum L. بومی ایران

In this research, 18 ecotypes of Hordeum spontaneum and Nosrat cultivar were evaluated for vernalization requirement in a field trail during 2011-2012 growing season. In order to identify growth habit and vernalization requirement, and evaluate the relation of that with origin of the ecotypes, after passing of winter coldness and in the middle of spring, the ecotypes were sown in the field in two different experiments. In the first experiment, the ecotypes were sown with no vernalization treatment, in a complete block design with three replications, the second experiment included three weeks vernalized seeds which were sown in the same experimental design. Evaluation of growth habit indicated that, ecotypes originating from desert and cold desert climates had the growth habit III, and the Mediterranean and cool steppe ecotypes were from the growth habit IV and V. This result is in line with the climatic conditions of ecotypes origins and it seems that diversity of vernalization requirement in these ecotypes is as a result of their adaptations to environmental conditions in their origins.