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.
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