تغییرات عملکرد و اجزای عملکرد گندم آذر2 با پرایمینگ بذر توسط سه تنظیم‌کننده آنتی‌جیبرلین

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانشیار، گروه زراعت و اصلاح نباتات، دانشکده کشاورزی دانشگاه زنجان، زنجان، ایران

2 دانشجوی کارشناسی ارشد، گروه زراعت و اصلاح نباتات، دانشکده کشاوری دانشگاه زنجان، زنجان، ایران

چکیده

در این پژوهش، تأثیر سه تنظیم‏کننده رشد آنتی‌جیبرلین بر عملکرد و اجزای عملکرد گندم رقم آذر2 تحت شرایط آبیاری منظم در قالب طرح بلوک­های کامل تصادفی با سه تکرار در مزرعه تحقیقاتی دانشگاه زنجان در سال زراعی 92-1391 مورد ارزیابی قرار گرفت. تیمارهای آزمایش شامل تیمار شاهد (عدم پرایم)، هیدروپرایم (پرایم با آب مقطر)، کلرمکوات کلراید (400، 800، 1200 و 1600 میکرومولار)، پاکلوبوترازول (35، 70، 105 و140 میکرومولار) و انسیمیدول (10، 20، 30 و40  میکرومولار) بودند. در مقایسه با تیمار شاهد، عملکرد زیستی در بیشتر تیمارها با کندکنندهای رشد کاهش یافت. در مقابل، کاربرد هر سه کندکننده رشد باعث بهبود کلی عملکرد گندم آذر2 شد. از بین تیمارهای بالا، پاکلوبوترازول در غلظت 140، انسیمیدول در غلظت 20 و کلرمکوات کلراید در غلظت 800 میکرومولار توانستند بیشترین عملکرد دانه را تولید کنند. پرایم بذر با کندکننده‏های رشد موجب افزایش وزن هزار دانه در مقایسه با تیمار شاهد شد. بیشترین تعداد سنبله بارور در مترمربع در تیمار 800 میکرومولار کلرمکوات کلراید و بیشترین تعداد دانه در سنبله در تیمار 20 میکرومولار انسیمیدول مشاهده شد. افزایش تعداد سنبله بارور، کوتاه‌تر شدن سنبله­ها را به دنبال داشت و در نتیجه سنبله‌هایی کوتاه‌تر اما با دانه‌هایی درشت‌تر در بوته‌ها تولید شد. به نظر می‌رسد که رقم آذر 2 پتانسیل افزایش تعداد دانه در سنبله و نیز افزایش وزن دانه­ها را دارد و از این­رو امکان افزایش عملکرد دانه از هر دو روش در این رقم وجود دارد.

کلیدواژه‌ها


عنوان مقاله [English]

Variations in yield and yield components by seed priming with three anti-gibberellin regulators on wheat cv. Azar-2

نویسندگان [English]

  • Farid Shekari 1
  • Soheila Karami 2
  • Jalal Saba 1
1 Assoc. Prof., Dept. of Agronomy and Plant Breeding, Faculty of Agriculture, University of Zanjan, Zanjan, Iran
2 M. Sc. Student, Dept. of Agronomy and Plant Breeding, Faculty of Agriculture, University of Zanjan, Zanjan, Iran
چکیده [English]

In this research, the effects of seed priming with three anti-gibberellin regulators were investigated on yield and yield components of wheat cv. Azar-2, based on randomized complete block design with three replications under regular irrigation conditions in research field of University of Zanjan, Zanjan, Iran, in 2012-2013. The experimental treatments were control (non-primed seeds), hydropriming, chlormequat chloride (400, 800, 1200 and 1600 μM), paclobutrazol (35, 70, 105 and 140 μM) and ancimidol (10, 20, 30 and 40 μM). The biological yield decreased in most treatments compared to control. On the other hand, seed priming with all of the growth retardants increased the grain yield. In contrast, the use of three growth retarder totally improved the grain yield of wheat cv. Azar-2. Among the growth regulators, paclobutrazol in 140, ancymidol in 20 and chlormequat chloride in 800 μM had the highest grain yield. Seed priming with mentioned growth retardants increased 1000-kernel weight compared to control. The highest fertile spike/m2 and seed/spike was found in 800 μM chlormequat chloride and 20 μM ancymidol, respectively. By increment in the number of fertile spikes, the length of spike decreased significantly. As a result, there are smaller spikes but with large grains in each plant. It seems that Azar-2 cultivar has a potential for increasing both the number of grain/spike and grain weight. Therefore, it is possible to increase grain yield in this cultivar by improving sink straight from both ways.

کلیدواژه‌ها [English]

  • Ancymidol
  • Chlormequat chloride
  • Grain number
  • Fertile spike
  • Paclobutrazol
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