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Chromosomal Location of Genes Influencing Grain Protein Concentration and Mixogram Properties in ‘Plainsman V’ Winter Wheat

Pioneer Overseas Corp., M.S. 499, Wyreema, QLD. 4352, Australia
Dep. of Agronomy
Dep. of Grain Science
USDA-ARS and Dep. of Agronomy
Dep. of Plant Pathology, Kansas State Univ., Manhattan, KS 66506

^* Corresponding author.

A disomic F₂ substitution study was conducted to elucidate the chromosomal location of genes influencing the high grain-protein concentration (GPC) in ‘Plainsman V’ (PV) wheat (Triticum aestivum L.) and to give preliminary information on genes influencing its dough mixogram peak time and tolerance. Plainsman V has been used extensively in the Kansas State University wheat breeding program and is included in the pedigree of many lines because of its high GPC and strong gluten. Data were collected over 2 yr on PV F₂ substitution lines derived from crossing PV with the monosomic set of ‘Wichita’. In the first year, F_3:4 lines from substitution lines were grown at two locations. The F_3:4 lines IA, 1B, 4B, 5B, and 7A were identified as critical chromosomes. In a second study of the progeny, 1A, IB, and 7A had PV's higher GPC, suggesting chromosomal location of positive factors. Other chromosomes may be involved. Preliminary results suggest that Group 2 chromosomes have positive effects on mixogram peak time. The data do not give conclusive evidence for location of factors influencing mixogram tolerance; however, there is some evidence that there is a positive factor on 6A and a negative factor on 2D. In this study, no association was observed between location of factors influencing grain-protein concentration and location of factors influencing the mixogram traits in Plainsman V.

Received for publication April 10, 1990.