بررسی عملکرد و اجزای عملکرد ژنوتیپ‌های مختلف ارزن تحت دو رژیم آبیاری

نوع مقاله : مقاله پژوهشی

نویسندگان

دانشگاه شهید باهنر کرمان

چکیده

به منظور بررسی عملکرد، اجزاء عملکرد ژنوتیپ‌های مختلف ارزن و تعیین متحمل‌ترین ژنوتیپ براساس شاخص‌های تحمل به خشکی تحت رژیم‌های مختلف آبیاری آزمایشی به‌صورت کرت‌های خرد شده در قالب طرح بلوک‌های کامل تصادفی با سه تکرار در دانشکده کشاورزی دانشگاه شهید باهنر کرمان اجرا گردید. سطوح آبیاری براساس تبخیر تجمعی از تشتک تبخیر کلاس A شامل سطح اول آبیاری، بدون تنش (50 میلی‌متر تبخیر) و سطح دوم آبیاری، تنش (100 میلی‌متر تبخیر) به‌عنوان فاکتور اصلی و ژنوتیپ‌های مختلف ارزن معمولی و ارزن دم روباهی به‌عنوان فاکتور فرعی در نظر گرفته شدند. نتایج تجزیه واریانس حاکی از کاهش معنی‌دار همه صفات زراعی تحت تنش خشکی بود. مقایسه میانگین گروهی بین ژنوتیپ‌های مختلف ارزن بیانگر آن بود که ژنوتیپ‌های ارزن معمولی نسبت به ژنوتیپ‌های ارزن دم روباهی برتری داشتند. از بین شاخص‌های تحمل به خشکی شاخص میانگین بهره‌وریMP ، میانگین هندسی بهره‌وری GMP، شاخص تحمل تنش STI و شاخص عملکرد YI همبستگی مثبت و معنی‌داری با عملکرد در شرایط تنش و بدون تنش نشان دادند و شاخص‌های مناسبی برای شناسایی ژنوتیپ‌های ارزن متحمل به تنش خشکی می‌باشند. در این آزمایش اکوتیپ گلباف پتانسیل عملکرد زیادتر و تحمل نسبی بیشتری نسبت به تنش خشکی نشان داد و می‌تواند به‌عنوان اکوتیپ امید بخش در معرفی ارقام جدید متحمل به خشکی به‌کار رود.

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