The winter hardiness of seven T. durum genotypes of different origin and with different degrees of frost resistance was evaluated under field conditions between 1995 and 1999. In order to trace changes in winter hardiness over time, the number of surviving plants was counted in early December, January, February, March and April. The bread wheat (T, aestivum) varieties used as the control (Bánkúti 1201, which has moderate frost resistance, and NS Rana 2, with poor resistance) only showed poor overwintering in the winter of 1995/96. It can thus be stated that with the exception of 1995/96 the temperature in the years examined was not critical for wheat, as a consequence of which the T. durum varieties, which are more sensitive to frost, overwintered without any great loss. The data recorded during the early spring frosts experienced in 1996 confirmed numerically the practical observation that T. durum suffers frost damage in spring, rather than during the winter. The results of experiments carried out in the Martonvásár phytotron and the overwintering data for 1995/96 indicate that the mean level of hardiness of T. durum genotypes is generally lower and lasts for a shorter time than that of the winter T. aestivum varieties grown in Hungary. Of the four winters examined, a close positive correlation between field winter hardiness dynamics and the dynamics of frost resistance in the phytotron was only obtained under the meteorological conditions of 1995/96. These results confirm that if selection for frost resistance and winter hardiness is to be successful, the evaluation of frost resistance in T. durum wheat varieties and other genotypes should be carried out under controlled conditions in a phytotron.
|Translated title of the contribution||Dynamics of winter hardiness in Triticum durum (Desf.) genotypes|
|Number of pages||2|
|Publication status||Published - 1999|
ASJC Scopus subject areas
- Agronomy and Crop Science