Winter durum wheat genotypes have been selected in Martonvásá r on the basis of the yellow colour of the semolina since 1995. During this period the yellow index of 1324 winter durum wheat varieties and advanced lines was tested using a Minolta CR-300 chromameter. The experiments were designed to investigate the variability present in the breeding stock, correlations between the yellow index and other technological parameters, and the year dependence of the yellow index, including the influence of various meteorological factors. The average yellow index values of the advanced lines and of Hungarian and foreign varieties fluctuated over a wide range (19.9-24.4) in different years. Correlation analysis confirmed previous observations on spring durum wheat varieties, which indicated that no correlations could be demonstrated between the yellow pigment content and other pasta quality parameters even at a medium level of significance. The yellow index varied with the year. Among the meteorological factors, rainfall and maximum temperature during grain filling, and minimum temperature in the period immediately preceding ripening had an influence on the yellow pigment content. As the result of selection, there has been a substantial increase in the yellow index of the winter durum wheat lines intended for inclusion in state variety trials. Before selection was begun the average yellow index of these lines was 99.2% compared with that of the control variety Parus, while this value had risen to 113.2% by 2000. The yellow index of the best lines exceeded that of the control varieties by more than 30%, while the ratio of lines with yellow index values lower than that of Pants declined from 60% to 5%. The mean yellow index values recorded for state registered Martonvasar varieties over the last 6 years confirm that the technological quality of winter durum wheat genotypes can be substantially improved by selection.
|Translated title of the contribution||Results of selection for higher yellow index in winter durum wheat|
|Number of pages||8|
|Publication status||Published - Feb 2004|
ASJC Scopus subject areas
- Agronomy and Crop Science