Growing varieties with good winter hardiness and frost resistance is a basic precondition for the safe production of winter durum wheat (Triticum durum Desf.). In overwintering experiments carried out in the field in Martonvásár between 1995 and 2003 there was a significant difference every year between the overwintering values of varieties with poor and good frost resistance, while the values achieved for those with moderate and good frost resistance only differed significantly in two years. The majority of the varieties and advanced lines bred in Martonvásár had winter hardiness equal to or better than that of the control bread wheat variety Bánkúti 1201 even under extreme winter conditions. Only a moderate correlation was obtained between the mean air temperature in the winter months and the mean winter hardiness of the varieties, confirming that the winter hardiness of the plants was influenced jointly by a number of environmental factors (e.g. cold, snow cover). The survival percentages obtained in the phytotron were closely correlated with the overwintering percentages recorded in the cold winter of 2002/2003, indicating that the phytotron freezing test is an excellent way of selecting winter-hardy T. durum genotypes even in mild winters. In experiments on the dynamics of winter hardiness in durum wheat, even frost-sensitive T. durum varieties overwintered with little loss in mild winters, while in the two coldest winters experienced during the experimental years, the hardiness of these varieties did not provide sufficient protection against the damaging effects of the winter even in December, and by January all the plants were destroyed. Averaged over eight years, the results indicate that some of the T. durum genotypes grown in Hungary have winter hardiness equal to or better than that of winter T. aestivum varieties with moderate frost resistance.
|Number of pages||9|
|Publication status||Published - Dec 1 2004|
ASJC Scopus subject areas
- Agronomy and Crop Science