Bred-making quality and stability of winter wheat grown in semiarid conditions
2001
Mladenov, N. | Misic, T. | Przulj, N. | Hristov, N. (Institute of Field and Vegetable Crops, Novi Sad (Yugoslavia))
The objective of the paper was to determine the effects of the cultivar, year, and cultivar x year interactions on the expression of several technological quality characters in winter wheat grown under semiarid conditions of the Vojvodina province. Twenty-three winter wheat cultivars were grown over a seven-year period (1990-1996). The harvested grain was milled and the flour was analysed for protein content, wet gluten, bread yield, and loaf volume. The significance of cultivar x year interactions was determined using two parameters of stability - the coefficients of regression and deviation from regression. In protein content, wet gluten, and bread yield, the contribution of the year to total variance was higher than that of the cultivar, while for loaf volume the situation was the opposite. The parameters of stability showed that a number of cultivars exhibited stability for some of the quality indicators under investigation. However, only the cultivar Proteinka had both a high phenotypic value and high environmental stability for all the traits involved. In order to reduce the negative effects of cultivar x environment interactions on the technological quality of winter wheat, we need to develop cultivars that have a high potential for yield and technological quality as well as tolerance to soil and air droughts at grain fill, so that they are suitable for growing under semiarid conditions.
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