Inheritance and mechanism of glyphosate resistance in annual bluegrass ( Poa annua L.)
| العنوان: | Inheritance and mechanism of glyphosate resistance in annual bluegrass ( Poa annua L.) |
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| المؤلفون: | Rajesh Barua, Jenna Malone, Peter Boutsalis, Gurjeet Gill, Christopher Preston |
| المصدر: | Pest Management Science. 78:1377-1385 |
| بيانات النشر: | Wiley, 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | Herbicides, Insect Science, Australia, Glycine, Inheritance Patterns, General Medicine, 3-Phosphoshikimate 1-Carboxyvinyltransferase, Poa, Agronomy and Crop Science, Herbicide Resistance |
| الوصف: | In initial screening, glyphosate was ineffective in controlling five Poa annua populations. These populations were tested for resistance, and studies undertaken to determine resistance mechanisms and inheritance pattern.Dose-response studies conducted at 16/12°C and 27/20°C on the five putative resistant populations showed low-level resistance (1.4- to 2.5-fold) to glyphosate. Shikimic acid accumulation in response to glyphosate confirmed differences among the populations, with greater shikimic acid accumulation in the susceptible population. The EPSPS gene copy number was 0.5- to 5.2-fold greater in one resistant population (HT) than in the susceptible (S) population, but not in the others. EPSPS gene expression was five- to tenfold higher in HT compared with the susceptible population. Target site mutations, differences in glyphosate absorption or translocation or altered expression of aldo-keto reductase (AKR) were not identified in any of the resistant populations. Crosses were successful between one resistant population and the susceptible population (P262-16♂ ✕ S♀) and inheritance of glyphosate resistance appears to be controlled by a single, nuclear dominant gene in this population.Our study identified EPSPS gene amplification in a South Australian glyphosate-resistant P. annua population (HT). This mechanism of resistance was not identified in the other four glyphosate-resistant populations, and other common mechanisms were excluded. Although the resistance mechanism in some P. annua populations remains unknown, inheritance studies with one population suggest the involvement of a single dominant gene. © 2021 Society of Chemical Industry. |
| تدمد: | 1526-4998 1526-498X |
| DOI: | 10.1002/ps.6754 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4cbde0196efff12b0ea36b125dad4746 https://doi.org/10.1002/ps.6754 |
| Rights: | CLOSED |
| رقم الانضمام: | edsair.doi.dedup.....4cbde0196efff12b0ea36b125dad4746 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 15264998 1526498X |
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| DOI: | 10.1002/ps.6754 |