Genotype and environmental interaction of certain indices of dormancy in winter wheat
A. Binek, M. Mośhttps://doi.org/10.17221/3602-PSECitation:Binek A., Moś M. (2005): Genotype and environmental interaction of certain indices of dormancy in winter wheat. Plant Soil Environ., 51: 390-396.
On the basis of five statistical parameters the stability of three dormancy indices, i.e. germinability, germination rate and dormancy index, has been determined 10 days after harvest at temperatures of 25°C. The object of the research included seeds of 12 winter wheat cultivars harvested in the years 1997–2003. In spite of significant genotype x environmental interactions accounting for 23.8–50.6% of the total variation, a significant differentiation between all the indices was found. Among the investigated cultivars a low level of dormancy was observed in the cultivars Wanda, Juma and Begra (germinability 83–92%, dormancy index 7.7–9.5), while evident dormancy was found in the cultivars Elena, Izolda, Almari, Mikon and Kobra (germinability 44–58%, dormancy index 21.3–32.2). The cultivars showing deep dormancy were characterized by lower stability of both the indices. The cultivars strongly reacting to the seasonal variation (b1 > 1), in respect of the three indices, were Sakwa, Kobra, Mikon and Elena. High consistency of the stability parameters was found between ecovalence and mean square of deviations from regression (r = 0.87**–0.98**) and between the linear regression coefficient and the coefficient of determination (r = 0.69*–0.86**).Keywords:
winter wheat; cultivars; germinability; germination rate; dormancy index; stability parameters