ارزیابی روابط علت و معلولی بین عملکرد دانه و اجزا آن در زنیان (Trachyspermum copticum L.) در شرایط آبیاری معمولی و تنش خشکی

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانشجوی دکترای اصلاح نباتات، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ساری، ایران

2 دانشیار، گروه اصلاح نباتات و بیوتکنولوژی، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ساری، ایران

3 دانشیار، گروه بیوتکنولوژی، دانشگاه تحصیلات تکمیلی صنعتی کرمان، کرمان، ایران

چکیده

شناسه دیجیتال (DOR):
98.1000/1735-0905.1398.35.222.94.2.1575.32

زنیان (Trachyspermum copticum L.)، یکی از گیاهان معروف خانواده چتریان است که از نظر تولیدات دارویی و اقتصادی دارای اهمیت می‌باشد. به‎منظور تعیین مهمترین صفات مؤثر بر عملکرد دانه، آزمایشی به‌صورت کرت‌های خردشده در دو شرایط آبیاری معمولی و تنش خشکی به‎عنوان عامل اصلی و 36 اکوتیپ زنیان متعلق به 9 استان مختلف کشور به‎عنوان عامل فرعی در قالب طرح بلوک کامل تصادفی با دو تکرار طی دو سال زراعی در کرمان انجام شد. نتایج تجزیه رگرسیون چندگانه خطی به‎روش گام به گام نشان داد که در شرایط تنش خشکی صفات تعداد چتر در بوته، تعداد دانه در چتر و عملکرد اسانس و در شرایط آبیاری معمولی صفات عملکرد بیولوژیک، وزن هزاردانه و تعداد دانه در چتر بیشترین تأثیر را بر عملکرد دانه داشتند که به‎ترتیب 87% و 99% از تغییرات به‎وسیله این صفات در دو شرایط تبیین شد. براساس نتایج تجزیه علیت، صفات تعداد چتر در بوته در شرایط تنش و عملکرد بیولوژیک در شرایط نرمال بیشترین اثر مستقیم را بر عملکرد دانه داشتند و به‎عنوان مهمترین اجزای عملکرد دانه شناخته شدند. این صفات می‌توانند به‎عنوان معیارهایی مناسب برای تسهیل فرآیند انتخاب غیرمستقیم و بررسی توانمندی عملکرد دانه در برنامه‌های به‎نژادی زنیان مدنظر قرار گیرند .

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