Oviposition and larval establishment of Sitodiplosis mosellana (Géhin) (Diptera: Cecidomyiidae) and its parasitoid, Macroglenes penetrans (Kirby) (Hymenoptera: Platygasteridae) on wheat with two potential mechanical resistance traits
| dc.contributor.committeeMember | Prager, Sean | |
| dc.contributor.committeeMember | Wist, Tyler | |
| dc.contributor.committeeMember | Bennett, Jon | |
| dc.contributor.committeeMember | Hucl, Pierre | |
| dc.contributor.committeeMember | Beattie, Aaron | |
| dc.contributor.committeeMember | Reddy, Gadi | |
| dc.creator | Vavra, Kristy | |
| dc.date.accessioned | 2023-03-28T19:02:58Z | |
| dc.date.available | 2023-03-28T19:02:58Z | |
| dc.date.copyright | 2023 | |
| dc.date.created | 2023-06 | |
| dc.date.issued | 2023-03-28 | |
| dc.date.submitted | June 2023 | |
| dc.date.updated | 2023-03-28T19:02:59Z | |
| dc.description.abstract | The orange wheat blossom midge, Sitodiplosis mosellana (Géhin) (Diptera: Cecidomyiidae), is a widespread and invasive pest that has been a serious economic threat to wheat production on the prairies in Canada. One form of antibiosis resistance with a single gene, Sm1, is currently available to reduce wheat midge damage, but other forms of resistance are needed in order to preserve this single resistance gene. Mechanical traits such as awns and pubescent glumes were evaluated alone and in combination over the growing seasons of 2020 and 2021. Pheromone traps were deployed to track emergence and population densities of wheat midge at the sites where experimental wheat was planted. Samples were collected from wheat spikes with different trait combinations from multiple fields in Saskatoon, Saskatchewan to measure 1) the ability of the wheat midge to oviposit on wheat spikes with mechanical resistance traits, 2) identify if mechanical resistance traits reflect a yield increase, decrease, or trade-off, and 3) compare the number of midge-damaged and undamaged seeds of wheat spikes with mechanical resistance traits to those without. These mechanical traits are also studied to see if they influence one of the natural enemies of the wheat midge, Macroglenes penetrans (Hymenoptera: Platygasteridae). There was no significant yield increase, decrease, or trade-off present when adding pubescent glumes or awns to wheat lines. Sitodiplosis mosellana Alternative Resistance in Triticum (SMART) lines with the combination of glabrous glumes, awns, and the Sm1 gene resulted in the lowest number of midge-damaged seeds for each sample. Alone or in combination, pubescent glumes did not deter the wheat midge or its parasitoid, M. penetrans, from reproducing on wheat spikes with these traits. Wheat spikes with awns did not show a significant decrease of wheat midge oviposition statistically. The timing of heading was recorded for each line and trait combination and different heading dates impacted yield and wheat midge oviposition. Macroglenes penetrans. Overall, this research highlights the effects and non-effects of mechanical resistance traits, hairy glumes and awns, on wheat midge. | |
| dc.format.mimetype | application/pdf | |
| dc.identifier.uri | https://hdl.handle.net/10388/14536 | |
| dc.language.iso | en | |
| dc.subject | wheat midge | |
| dc.subject | parasitoid | |
| dc.subject | wheat breeding | |
| dc.subject | antibiosis | |
| dc.subject | antixenosis | |
| dc.subject | breeding for resistance | |
| dc.subject | pubescent glumes | |
| dc.subject | awns | |
| dc.subject | orange wheat blossom midge | |
| dc.subject | Sitodiplosis mosellana | |
| dc.subject | Macroglenes penetrans | |
| dc.title | Oviposition and larval establishment of Sitodiplosis mosellana (Géhin) (Diptera: Cecidomyiidae) and its parasitoid, Macroglenes penetrans (Kirby) (Hymenoptera: Platygasteridae) on wheat with two potential mechanical resistance traits | |
| dc.type | Thesis | |
| dc.type.material | text | |
| thesis.degree.department | Plant Sciences | |
| thesis.degree.discipline | Plant Sciences | |
| thesis.degree.grantor | University of Saskatchewan | |
| thesis.degree.level | Masters | |
| thesis.degree.name | Master of Science (M.Sc.) |