MILLING AND BAKING QUALITY OF RESCUE-CADET RECIPROCAL SUBSTITUTION LINES

Abstract

Reciprocal disomic whole-chromosome substitution lines between the hard red spring wheat cultivars Cadet and Rescue were developed to investigate the effect of specific chromosomes on milling and baking quality. Quality measurements of the parents and reciprocal substitution lines on grain from randomized field trials for each of 3 yr were used to analyze aspects of the impact of specific chromosome substitutions on farinograph absorption, mixograph development time, flour protein content, flour yield, remix loaf volume and grinding time. Substitution of Rescue chromosomes of homoeologous groups 4 and 7 into Cadet had no effect on quality. Substitution of the corresponding Cadet chromosomes into Rescue had a major effect. Reciprocal chromosome effects in the direction of the donor parent were most striking for mixograph development time with chromosome 1A, farinograph absorption with 2A and 6B and grinding time with 1A, 1B and 6D. Transgressive reciprocal interaction in the direction of the recipient parent was observed for flour yield with chromosome 1A. Multiple effects of substituting chromosome 7A and 7D of Cadet into Rescue may be related to percentage of flour protein. These and other effects of chromosome substitution are reported and interpreted.