Genotype‐by‐Tillage Interactions in Hard Red Winter Wheat Quality Evaluation

Abstract

AbstractWinter wheat (Triticum aestivum L.) is grown under both conventional‐till and conservation‐till systems in the Northern Great Plains. A benefit of sowing winter wheat into standing stubble is the protection the crop receives from trapped snow and the resultant reduction in winter kill. A 5‐yr study was conducted at four locations in North Dakota to measure cultivar‐by‐tillage interactions for quality parameters of wheat and to determine whether testing under both conventional‐till and no‐till systems was advantageous. Fourteen hard red winter wheat cultivars were planted during 1984‐1985 through 1988‐1989 in a Max loam (fine‐loamy, mixed, Typic Haploborolls) at both Williston and Minot, in a Svea loam (fine‐loamy, mixed, Pachic Udic Haploborolls) at Langdon, and in a Bearden silty clay (fine‐silty, frigid, Aeric Calciaquolls) or Gardena silty loam (coarse‐silty, mixed, Pachic Udic Haploborolls) at Fargo. Significant cultivar‐by‐tillage interactions (P < 0.05 or P < 0.01) were obtained for volume weight, protein content, and flour yield when the analysis was restricted to environments in which wheat winter killed. A change in rank order of cultivars was detected only for volume weight. For the other quality parameters measured, evaluation of winter wheats grown in conventional‐till and no‐till plots resulted in similar relative performance of cultivars.