Variety-by-environment interactions for winter wheat quality traits
2005
Linina, A., Latvia Univ. of Agriculture, Jelgava (Latvia) | Ruza, A., Latvia Univ. of Agriculture, Jelgava (Latvia)
Improvement of end-use in winter wheat (Triticum aestivum. L) depends on thorough understanding of influences of environment, variety, and their interaction. The objectives were to determine relative contribution of variety (V), environment (E) and V x E interaction to variation in quality characteristic of winter wheat. Field experiments with 10 winter wheat varieties of different origin were conducted on brown lessive soils of the Study and Research farm 'Peterlauki' of the Latvia University of Agriculture from 2002 to 2004. Wet gluten content (WG), gluten index (GI), dry gluten (DG), water binding capacity in wet gluten (WBC), sedimentation value (SED), grain protein content (GPC), test weight (TW), thousand kernel weight (TKW), Hagberg falling number (HFN) and starch (S) were measured. Highly significant differences were detected among the environments and varieties for each of the quality variables. Both variety (V) and environment (E) had a significant effect on quality traits. Significant V x E interactions indicated that quality traits evaluations must be undertaken for environments. A close positive correlation was determined between the wet gluten and dry gluten, sedimentation value. Dry gluten positively correlated with sedimentation value, water binding capacity and thousand-kernel weight. A significant positive correlation was found between gluten index and starch.
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