Off-campus South Dakota State University users: To download campus access theses, please use the following link to log into our proxy server with your South Dakota State University ID and password.
Non-South Dakota State University users: Please talk to your librarian about requesting this thesis through interlibrary loan.
Thesis - University Access Only
Master of Science (MS)
Karl D. Glover
E. Brent Tumipseed
Early planting of hard red spring wheat (HRSW; Triticum aestivum L.) tends to extend the period of vegetative growth and can help maximize agronomic productivity. Improved germination performance in sub-optimal temperatures, or cold temperature germination tolerance (CTGT), is therefore a desirable characteristic of HRSW grown in the North Central Great Plains region. Fifty HRSW genotypes were evaluated for germination and growth rates at ten temperatures: 3, 5, 7, 9, 11, 13, 15, 17, 19, and 20 °C. Genotypes were replicated four times within each temperature treatment. Germination scores, mass, and dry mass of seedlings were collected for each genotype. Due to limited rates of growth at colder temperatures, data was collected on day 7 for temperatures 13, 15, 17, 19, 20 °C and on day 14 for each of the remaining lower temperatures. Germination percentages were observed to decrease with lower temperature treatments and increased differences in treatment mean germination percentages were observed above 13 °C. Germination scores could not be collected at 3 °C, due to lack of seedling development. Genotype SD4330 was observed to possess the highest level of CTGT. Genotypes ‘Mott’ and SD4280 also exhibited high levels of CTGT. Winter wheat genotypes ‘Wesley’ and ‘Expedition’, which were included in the study for comparative purposes, were found to have the lowest level of CTGT. Broad sense heritability of CTGT on an entry mean basis was estimated to be 0.73 across the temperatures of 5-11 °C. This suggests that spring wheat breeders should be able to manipulate CTGT without great difficulty.
Library of Congress Subject Headings
Hard red spring wheat -- Varieties
Hard red spring wheat -- Effect of temperature on
Hard red spring wheat -- Preharvest sprouting
Includes bibliographical references (pages 39-44)
Number of Pages
South Dakota State University
In Copyright - Non-Commercial Use Permitted
Jenkins, Shawn, "Assessment of Hard Red Spring Wheat Germplasm for Germination in Sub-Optimal Temperatures" (2014). Electronic Theses and Dissertations. 1559.