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نقش جهش ایزولویسین-۲۰۴۱-آسپاراژین در ایجاد مقاومت سطح بالا به علفکش کلودینافوپ-پروپارژیل در تودههای یولاف وحشی زمستانه Avena ludoviciana | ||
| دانش علفهای هرز ایران | ||
| مقاله 2، دوره 12، شماره 2، اسفند 1395، صفحه 133-150 اصل مقاله (870.17 K) | ||
| نوع مقاله: مقاله پژوهشی | ||
| نویسندگان | ||
| حمیدرضا ساسانفر1؛ مهدی راستگو1؛ اسکندر زند2؛ عبدالرضا باقری3؛ محمدحسن راشد محصل4 | ||
| 1گروه علفهای هرز دانشکده کشاورزی دانشگاه مشهد | ||
| 2موسسه تحقیقات گیاهپزشکی | ||
| 3گروه بیوتکنولوژی دانشگاه مشهد | ||
| 4گروه زراعت دانشگاه مشهد | ||
| چکیده | ||
| یولاف وحشی زمستانه یکی از علفهایهرز مهم و مشکلساز مزارع گندم ایران میباشد. علفکشهای بازدارنده استیل کوآنزیم آ کربوکسیلاز (ACCase) به طور وسیعی برای کنترل یولاف وحشی در ایران استفاده میشوند. این روند باعث بروز مقاومت این علفهرز به این گروه از علفکشها شده است. به منظور بررسی سطح مقاومت به علفکش کلودینافوپ-پروپارژیل (EC 8%)، آزمایش دوز-پاسخ با 10 مقدار (از 0 تا 32 برابر مقدار توصیه شده (64 گرم ماده موثره در هکتار)) روی 15 توده یولاف وحشی مقاوم و یک توده حساس جمعآوری شده از استانهای فارس و خوزستان انجام شد. همچنین جهت ارزیابی مکانیسم مقاومت مبتنی بر محل هدف از روش CAPS و dCAPS استفاده شد. بر اساس نتایج آزمایش دوز-پاسخ سطح مقاومت به کلودینافوپ-پروپارژیل در سه توده M2، M3، S4 از فارس و توده R5 از خوزستان بسیار بالا بود. به طوری که این تودهها حتی با کاربرد مقدار 32 برابر مقدار توصیه شده نیز کنترل نشدند. شاخص مقاومت در این تودهها بر اساس بالاترین شاخص برآورد شده (در توده AN13) بیش از 93/21 بود. سه توده M1، S1 و F3 از فارس نیز مقاومت متوسطی (5-10) به علفکش نشان دادند. بر اساس نتایج آزمایش مولکولی، دو جهش ایزولویسین-۱۷۸۱-لویسین و ایزولویسین-۲۰۴۱-آسپاراژین در تودههای مقاوم شناسایی شد. ارزیابی نتایج آزمایش دوز-پاسخ و مولکولی نشان داد که در تودههای M2 و R5 جهش ایزولویسین-۲۰۴۱-آسپاراژین و در توده R5 به همراه شش توده از فارس شامل S1، S2، S3، S4، ES1 و توده AN13 از خوزستان جهش ایزولویسین-۱۷۸۱-لویسین رخ داده است. این اولین گزارش وجود همزمان این دو جهش در یک توده یولاف وحشی در دنیا میباشد. نکته قابل توجه این بود که تودههای M2 و R5 مقاومت بسیار بالایی به کلودینافوپ-پروپارژیل داشتند که با توجه به گزارشهای موجود، جایگزینی ایزولویسین-۲۰۴۱-آسپاراژین مرتبط با بروز مقاومت سطح بالا به علفکش کلودینافوپ-پروپارژیل و احتمالاً علفکشهای دیگر از خانواده فوپها در یولاف وحشی میباشد. | ||
| کلیدواژهها | ||
| بازدارنده ACCase؛ روشهای CAPS و dCAPS؛ شاخص مقاومت؛ مقاومت به علفکش | ||
| عنوان مقاله [English] | ||
| Role of Ile-2041-Asn in conferring high-level resistance to clodinafop-propargyl in winter wild oat (Avena ludoviciana) populations | ||
| نویسندگان [English] | ||
| Hamidreza sasanfar1؛ mehdi rastgo1؛ eskandar zand2؛ Abdolreza bagheri3؛ Mohammad Hassan Rashed mohassel4 | ||
| 1and Plant Breeding Department, Agriculture Campus, Ferdowsi University of Mashhad | ||
| 2Institute of Plant Protection | ||
| 3Biotechnology Department, Agriculture Campus, Ferdowsi University of Mashhad | ||
| چکیده [English] | ||
| Winter wild oat is an important and troublesome weed in wheat fields. Herbicides that inhibit the enzyme acetyl-coenzyme A carboxylase (ACCase inhibitors) have been widely used to control grass weeds such as wild oat in Iran, which has resulted in evolution of resistance to theses herbicides in wild oat. Whole-plant dose-response assay with 10 doses (from 0 to 32 times of the recommended rate, 64 g ai ha-1) was conducted to determine resistance level (RI) to clodinafop-propargyl (EC 8%) in 15 resistants and one susceptible wild oat populations from Fars and Khuzestan in southwest Iran. To evaluate the mechanism of resistance in resistant populations, cleaved amplified polymorphic sequence (CAPS) and derived cleaved amplified polymorphic sequence (dCAPS markers were used). The results of dose-response experiment clearly revealed that four (M2, M3, S4 from Fars and R5 from Khuzestan) out of fifteen populations were highly resistant to clodinafop-propargyl, where these populations were not even controlled over the range of 32 times of clodinafop-propargyl recommended rate. Therefore, resistance level in above population was greater than 21/93, the highest estimated RI for AN13. Three populations (M1, S1 and F3 from Fars) showed moderate resistance to clodinafop-propargyl with RI, 5-10. Based on molecular approaches, two known mutations (Ile-1781-Leu and Ile-2041-Asn) were identified in resistant populations. Results of a robust molecular assay demonstrated that the Ile-2041-Asn substitution occurred in M2 and R5 populations and the Ile-1781-Leu substitution occurred in the R5 population and 6 other populations; S1 S2, S3, S4, ES1 from Fars and AN13 from Khuzestan. This is the first report of a winter wild oat population carrying the both mutations in the world. Interestingly, this study revealed that Ile-2041-Asn substitution is associated with conferral of high-level resistance to clodinafop-propargyl and possibly other herbicides from FOPs family in winter wild oat. | ||
| کلیدواژهها [English] | ||
| Accase Inhibitors, CAPS and dCAPS Methods, Herbicide resistance, Resistance index | ||
| مراجع | ||
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