ارزیابی اجزاء مقاومت نسبی درتعدادی از لاین‌های امیدبخش گندم اقلیم سرد نسبت به بیماری زنگ زرد در شرایط مزرعه‌ای در اردبیل

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشگاه آزاد اسلامی، واحد ورامین پیشوا، دانشکده کشاورزی ، گروه بیماری‌شناسی گیاهی، ورامین

2 بخش تحقیقات علوم زراعی و باغی، مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی استان اردبیل ، سازمان تحقیقات، آموزش و ترویج کشاورزی، اردبیل، ایران

چکیده

در این پژوهش 21 لاین امیدبخش گندم اقلیم سرد همراه با دو رقم شاهد حساس بولانی و موروکو به منظور تعیین مقاومت نسبی آن‌ها نسبت به بیماری زنگ زرد در مزرعه تحقیقاتی اردبیل ارزیابی شدند. در این مطالعه اجزائ مختلف مقاومت نسبی شامل ضریب آلودگی، شدت نهائی بیماری، مقدار نسبی سطح زیر منحنی پیشرفت بیماری و نرخ آلودگی ظاهری در مرحله گیاهچه‌ای و گیاه کامل در شرایط مزرعه ارزیابی شدند. بعد از شاهد حساس، لاین‌های C-91-9 و C-91-20 بیشترین مقدار ضریب آلودگی، شدت نهائی بیماری، مقدار نسبی سطح زیر منحنی پیشرفت بیماری ، نرخ آلودگی ظاهری، تراکم جوش و اندازه جوش را داشتند. لاین‌های C-91-1، C-91-7، C-91-8، C-91-15 و C-91-18 در هر دو مرحله گیاهچه‌ای و گیاه کامل مقاوم، مصون یا آلودگی پایینی داشتند. لاین‌های C-91-12 و C91-21 که در مرحله گیاهچه‌ای حساس اما در مرحله گیاه کامل مقاوم بودند و مقادیر پایین آلودگی را نشان دادند، به عنوان لاین‌های دارای مقاومت تدریجی ارزیابی شدند. لاین‌های C-91-13 وC-91-14 در مرحله گیاهچه‌ای نیمه مقاوم و در مرحله گیاه کامل مقاومت کامل یا سطح مطلوبی از مقاومت نسبی را نشان دادند ولی لاین‌های C-91-3، C-91-4، C-91-1 و C-91-17 مقاومت نسبی( تدریجی) متوسطی داشتند و لاین‌هایC-91-2 ، C-91-5، C-91-9، C-91-10، C-91-11، C-91-6، C-91-20 وC-91-19 حساس بودند. رابطه مثبت و معنی‌داری بین شدت نهایی آلودگی با مقادیر ضریب آلودگی و همچنین بین rAUDPC و نرخ آلودگی ظاهری مشاهده شد. بیشترین ضریب همبستگی (r) بین شدت نهایی آلودگی با ضریب آلودگی به دست آمد (r = 0.99).

کلیدواژه‌ها

عنوان مقاله [English]

Evaluation of Partial Resistance Components in some Promising Wheat Lines of Cold Climate Zone to Yellow Rust Disease in Field Condition in Ardebil, Iran

نویسندگان [English]

  • T. Dolatkhah Ajirloo 1
  • M. Torabi 1
  • S.A. Safavi 2
1 Department of Plant Pathology, College of Agriculture, Varamin- Pishva Branch, Islamic Azad University, Varamin, Iran
2 Field and Horticultural Crops Science Research Department, Ardebil Agricultural and Natural Resources Research and Education Center, AREEO, Ardebil (Moghan), Iran.
چکیده [English]

A set of 21 bread wheat lines of cold climate zone of Iran, along with two susceptible check cultivars were studied to determine their partial resistance to yellow rust. Different components of partial resistance including coefficient of infection (CI), final rust severity (FRS), relative area under disease progress curve (rAUDPC), and apparent infection rate (r) were evaluated at both seedling and adult plant stages under field conditions. Lines C-91-9, C-91-20 and susceptible checks had the highest values of rAUDPC, FRS, CI, r, pustule density and pustule size. Lines C-91-1, C-91-7, C-91-8, C-91-15 and C-91-18 were resistant or had low infection at both seedling and adult plant stages. Lines C-91-12 and C-91-21 were susceptible at seedling stage, but showed resistance reaction or low infection at adult plant stage. These lines seem to have slow rusting (partial) resistance. Lines C-91-13 and C-91-14 were moderately resistant at seedling and resistant at adult plant stage, while lines C-91-3, C-91-4, C-91-16 and C-91-17 had moderate level of partial resistance and C-91-2, C-91-5, C-91-6, C-91-9, C-91-10, C-91-11, C-91-19 and C-91-20 were susceptible. Positive and significant correlations were observed between FRS and CI and also between rAUDPC and apparent infection rate. The highest coefficient of correlation (r) was observed between FRS with CI (r = 0.99).

کلیدواژه‌ها [English]

  • Wheat
  • yellow rust
  • partial resistance
  • seedling resistance
  • adult plant resistance

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نهال و بذر
دوره 32، شماره 3
آذر 1395
صفحه 347-367

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