Document Type

Thesis - Open Access

Award Date


Degree Name

Master of Science (MS)




In 1971, 12 selections in the wheat improvement project at the South Dakota Experiment Station were found to have unusually high protein. The selections had been developed through a backcross program using 'Agrus/7*Thatcher' as a donor of rust resistance. The resistance was derived from Agropyron elongatum from which a chromosome had been substituted for 7D in the Agrus genome. Knott had subsequently induced a translocation of the resistance factor to 'Thatcher' in his selection Agrus/7*Thatcher. In South Dakota the resistance was first transferred to 'Nebred' and then in one backcross to 'Hume'. A recent report from the Hard Winter Wheat Quality Laboratory at Manhattan, Kansas indicated the best of the selections, 'SD69103', had superior dough mixing properties, a loaf volume of 1244cc, and a protein content of 16.2)6. The chec1<, a Hume-Scout 66 composite had a protein content 4 of only 13.1% and a loaf volume of 1010cc. The present study was conducted to determine: 1. The inheritance of the high protein in SD69103 in crosses with other wheat cultivars having high, medium, and low protein levels. 2. The associations in inheritance of grain protein level with seed size, plant height, yield of grain, number of tillers, days to flowering, and reaction to leaf and stem rust. 3. The inheritance of reaction to leaf and stem rust. 4. The characteristics of SD69103 in relation to its parents.

Library of Congress Subject Headings

Wheat -- Disease and pest resistance -- genetic aspects


South Dakota State University Theses



Number of Pages



South Dakota State University