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Volunteer spring triticale (× Triticosecale Wittmack) seed persistence and control Open Access


Other title
volunteer wheat
pre-harvest sprouting
seed bank
volunteer triticale
seed persistence
seed mediated gene flow
Type of item
Degree grantor
University of Alberta
Author or creator
Raatz, Lisa L
Supervisor and department
Hall, Linda (Agricultural, Food, and Nutritional Science)
Examining committee member and department
Macdonald, Ellen (Renewable Resources)
Strelkov, Stephen (Agricultural, Food, and Nutritional Science)
Dosdall, Lloyd (Agricultural, Food, and Nutritional Science)
Department of Agricultural, Food, and Nutritional Science
Plant Science
Date accepted
Graduation date
Master of Science
Degree level
Spring triticale is being evaluated as a platform crop for bio-industrial products on the Canadian prairies and may require genetic modification (GM). Seed lost at harvest may persist and result in volunteer GM triticale populations in following crops that could impact co-existence with conventional cereals. Field experiments were conducted from 2006-2010 to assess the persistence of spring triticale in the soil seed bank and evaluate the effect of herbicide timings within four following rotations on volunteer triticale survival and fecundity. Relative to buried seed, triticale on the soil surface persisted longest, although 99% was non-viable after 19 months. Shallow buried seed germinated readily and formed volunteer populations. The combination of pre-seed and crop-specific in-crop herbicides provided the most consistent control, reducing volunteer triticale densities by 72-100%. Competitive subsequent crops, such as glyphosate tolerant canola, in combination with pre-seed and in-crop herbicides, minimize volunteer triticale seed bank replenishment in Alberta.
Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
Citation for previous publication
Raatz, L.L., R.-C. Yang, B.L. Beres, and L.M. Hall. 2012. Persistence of Triticale Seed in the Soil Seed Bank. Crop Science. 52: 1868-1880.

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