ارزیابی عملکرد و برخی ویژگی‌های مورفوفیزیولوژیکی ژنوتیپ‌های لوبیای چیتی (Phaseolus vulgaris L.) تحت رژیم‌های مختلف آبیاری

نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه تولید و ژنتیک گیاهی، دانشکده کشاورزی، دانشگاه صنعتی اصفهان، اصفهان، ایران

2 مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی استان مرکزی، اراک، ایران

چکیده

این آزمایش در مزرعه پردیس تحقیقات و آموزش لوبیای خمین به صورت کرت­های خردشده در قالب طرح بلوک‌های کامل تصادفی با سه تکرار در سال زراعی 1398 انجام شد. رژیم آبیاری به عنوان کرت اصلی شامل 50 (I1)، 70  (I2) و 110 (I3) میلی­متر تبخیر تجمعی از تشت تبخیر کلاس A بود. هجده ژنوتیپ لوبیاچیتی به عنوان کرت فرعی در نظر گرفته شد. تنش خشکی باعث کاهش محتوای نسبی آب برگ، شاخص سطح برگ، ارتفاع بوته، تعداد دانه در غلاف، تعداد غلاف در بوته، تعداد دانه در بوته، شاخص برداشت و عملکرد بیولوژیک و دانه شد. به علاوه، میزان این کاهش با افزایش شدت تنش خشکی بیشتر بود. با توجه به ضرایب همبستگی بین صفات در رژیم آبیاری I3 یا تنش شدید، همبستگی بین عملکرد دانه با تعداد غلاف در بوته، تعداد دانه در غلاف و تعداد دانه در بوته مثبت و معنی­دار بود. ژنوتیپ‌های لوبیاچیتی از نظر شاخص سطح برگ، ارتفاع بوته، تعداد دانه در غلاف، تعداد غلاف در بوته، عملکرد دانه، شاخص برداشت و شاخص تحمل به خشکی (STI) در شرایط تنش ملایم و شدید تفاوت معنی‌داری داشتند. در بین ژنوتیپ های مورد مطالعه، با توجه به شاخص تحمل به خشکی از نظر عملکرد دانه، ژنوتیپ غفار به عنوان ژنوتیپ متحمل به خشکی شناسایی شد. به طور کلی، تنوع قابل‌توجهی در بین ژنوتیپ‌های مورد مطالعه در پاسخ به سطوح مختلف آبیاری وجود داشت که می‌توان از آن برای اصلاح­نژاد و انتخاب لوبیاچیتی برای تحمل به خشکی استفاده کرد.

کلیدواژه‌ها

موضوعات


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