اثر کاربرد میکوریزا بر تحمل هیبریدهای ذرت به تنش خشکی

نوع مقاله: پژوهشی

نویسندگان

1 گروه زراعت و اصلاح نباتات، واحد تبریز،دانشگاه آزاد اسلامی، تبریز،ایران

2 دانشگاه آزاد اسلامی، واحد تبریز، گروه زراعت و اصلاح نباتات، تبریز، ایران

3 گروه بیوتکنولوژی کشاورزی، دانشگاه شهید مدنی آذربایجان ، تبریز،ایران

10.22034/aej.2019.1872181.1100

چکیده

این پژوهش با هدف بررسی ­واکنش­ هیبریدهای مختلف ذرت مواجه با کم­آبی به کاربرد قارچ مایکوریزا به صورت آزمایش اسپلیت فاکتوریل بر پایه­ ­طرح بلوک­های­ کامل تصادفی طی دو سال 1394 و 1395 در ایستگاه تحقیقاتی دانشکده ­کشاورزی دانشگاه­ آزاد اسلامی واحد تبریز انجام شد. عامل اصلی شامل کم­آبی بر اساس تبخیر از تشتک کلاس A در دو سطح ­70 میلی­متر به عنوان شاهد و 140 میلی­متر به عنوان تنش خشکی و عامل فرعی شامل 14 ترکیب فاکتوریل کاربرد و عدم کاربرد قارچ مایکوریزا با هفت هیبرید ­ذرت شامل SC260، SC400، SC301، SC4015، SC703، SC704 و SC705 بودند. برای ارزیابی میزان تحمل و حساسیت هیبرید­های ذرت به تنش­خشکی از شاخص­­ تحمل به تنش، شاخص حساسیت به تنش، شاخص تحمل، میانگین حسابی محصول­دهی و میانگین هندسی محصول­دهی استفاده شد. تجزیه مرکب دو ساله نشان داد که برای اکثر صفات مورد مطالعه اثر متقابل سال در تنش در هیبرید ذرت معنی­دار بود. عمکرد دانه در هر دو سال متوالی در شرایط کاربرد قارچ میکوریزا در هیبرید SC301 عملکرد بهتری از سایرین داشت و نیز به عنوان متحمل­ترین هیبرید ذرت به تنش خشکی شناخته شد. شاخص­های شاخص تحمل به تنش و میانگین هندسی محصول­دهی همبستگی مثبت و معنی­داری با عملکرد دانه در هر دو سال داشتند. همچنین، کاربرد میکوریزا بر تخفیف اثرات تنش خشکی اثر متفاوتی داشت ولی در کل باعث افزایش عملکرد ذرت در شرایط تنش خشکی شد.

کلیدواژه‌ها


عنوان مقاله [English]

Effect of mycorrhiza application on corn hybrids tolerance to drought stress

نویسندگان [English]

  • khatereh tavakoli oujani 1
  • Varahram Rashidi 1
  • Mehrdad Yarnia 2
  • Alireza Tarinejad 3
  • Bahram Mirshekari 1
1 Department of Agriculture and Plant Breeding, Tabriz Branch, Islamic Azad University, Tabriz, Iran
2 Department of Agriculture and Plant Breeding, Tabriz Branch, Islamic Azad University, Tabriz, Iran
3 Associate professor, Department of Agronomy and Plant Breeding, College of Agriculture, Islamic Azad University, Tabriz, Iran
چکیده [English]

This study aimed to evaluate corn hybrids under drought stress reaction to application of mycorrhiza as split factorial experiment based on randomized complete block design during 2015 and 2016 at Research Station of Faculty of Agriculture, Islamic Azad University, Tabriz Branch, Iran. The main factor included drought stress based on evaporation from class A pan at two levels of 70 millimeters as control and 140 millimeters as drought stress. The sub factor was 14 factorial combinations of mycorrhiza fungi application and non-application with seven corn hybrid including SC260, SC301, SC400, SC4015, SC703, SC704, and SC705. To evaluate tolerance and sensitivity of corn hybrids to drought stress, the stress tolerance index, stress sensitivity index, tolerance index, mean productivity and the geometric mean of the product were used. Two-year complex analysis showed that in most of the studied traits, the interaction of year and stress was significant in corn hybrids. Seed yield in two years was increased more with mycorrhiza application in hybrid SC301 than other hybrids considered as the most tolerant corn hybrid to drought stress. Indices of stress tolerance index and geometric mean productivity had positive and significant correlation with grain yield in both years. Also, mycorrhiza application had a different effect on mitigating of drought stress effects, but in general it increased maize yield under drought stress conditions.

کلیدواژه‌ها [English]

  •  mycorrhizal fungi
  •  sensitivity index
  •  single cross
  •  water stress
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