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Genetic Loci Related to Kernel Quality Differences between a Soft and a Hard Wheat Cultivar

^a Embrapa, C.P. 179, Santo Antonio de Goias, GO, 75375, Brazil
^b Dep. of Plant Breeding and Genetics, 240 Emerson Hall, Cornell Univ., Ithaca, NY 14853
^c Roman Meal Co., 2101 S. Tacoma Way, Tacoma, WA 98409
^d USDA, Soft Wheat Quality Lab., Williams Hall, 1680 Madison Ave. Wooster, OH 44691
^e NeoVentures Biotechnology Inc., 69 Mary Street, Guelph, ON, Canada, N1G 2A9F

View larger version (84K): [in a new window]   Fig. 1. Genetic linkage map of the AC Reed x Grandin wheat population, based on recombination among 101 DH lines. Linkage groups are named by homoeologous group, genome and chromosome arm. Three groups were not identified (Unk1-3). Diagonal lines or criss-cross pattern on the chromosome bars indicate segregation distortion (2 p < 0.001) toward AC Reed or Grandin, respectively. Underlined font indicates loci close to QTL peaks detected by CIM (details in Table 2). Solid bars indicate approximate 95% confidence intervals for QTLs detected by joint-analysis of locations, with peak LOD scores in parenthesis. QFY: Quadrumat flour yield; SE: softness equivalent; PRO: flour protein content; AWRC: alkaline water retention capacity.

View larger version (34K): [in a new window]   Fig. 2. Distribution of average of softness equivalent over three locations before and after adjustment for texture class (original and adjusted, respectively). Forty-five lines had low original SE and were classified as hard; 56 lines had high original SE and were classified as soft. The phenotypes of the parents are indicated by arrows.

View larger version (55K): [in a new window]   Fig. 3. Summary of results of single marker regression analysis of grain quality traits in the AC Reed x Grandin DH population. Light gray, dark gray, and black indicate significance at the 0.05, 0.01, and 0.001 level, respectively. Only markers that were significant at 0.001 level for at least one trait are shown. A dot indicates increasing effect from AC Reed. Markers are in mapping order within linkage groups. Allis-Chalmers milling, mixogram, and baking traits were evaluated at Tulelake only.