ارزیابی روابط عملکرد دانه و برخی از صفات مورفوفیزیولوژیک در ژنوتیپ‌های گندم نان در شرایط دیم و آبیاری تکمیلی
الموضوعات :
اکوفیزیولوژی گیاهان زراعی
سامان معتضدی
1
(دانشجوی دکتری، گروه زراعت، واحد تاکستان، دانشگاه آزاد اسلامی، تاکستان، ایران)
سعید سیف زاده
2
(عضو هیات علمی،گروه زراعت، واحد تاکستان، دانشگاه آزاد اسلامی، تاکستان، ایران)
رضا حق پرست
3
(موسسه تحقیقات کشاورزی دیم، سازمان تحقیقات، آموزش و ترویج کشاورزی، کرمانشاه، ایران)
حمیدرضا ذاکرین
4
(عضو هیات علمی،گروه زراعت، واحد تاکستان، دانشگاه آزاد اسلامی، تاکستان، ایران)
حمید جباری
5
(موسسه تحقیقات اصلاح و تهیه نهال و بذر، سازمان تحقیقات، آموزش و ترویج کشاورزی، کرج، ایران)
جهانفر دانشیان
6
(موسسه تحقیقات اصلاح و تهیه نهال و بذر، سازمان تحقیقات، آموزش و ترویج کشاورزی، کرج، ایران)
تاريخ الإرسال : 11 السبت , رمضان, 1439
تاريخ التأكيد : 18 الخميس , جمادى الأولى, 1440
تاريخ الإصدار : 16 الأحد , شعبان, 1440
الکلمات المفتاحية:
تجزیه علیت,
تجزیه همبستگی,
صفات مورفوفیزیولوژیک,
عملکرد کاه و کلش,
طول برگ پرچم,
ملخص المقالة :
روابط بین عملکرد دانه با برخی از صفات مورفوفیزیولوژیک و تعیین اهمیت نسبی هر یک از آنها، در 25 ژنوتیپ گندم نان از نظر14صفت مورفوفیزیولوژیک طی آزمایشی در دو شرایط دیم و آبیاری تکمیلی در قالب طرح بلوک های کامل تصادفی با سه تکرار در شرایط مزرعه طی سال های زراعی 1395-1393در شرایط آب و هوایی غرب کشور (ایستگاه تحقیقات کشاورزی دیم سرارود کرمانشاه) مورد بررسی قرار گرفتند. نتایج تجزیه واریانس نشان داد که صفات مورد بررسی، به جز طول سنبله، تفاوت معنی داری در دو شرایط دیم و آبیاری تکمیلی داشتند. در شرایط آبیاری تکمیلی، صفات مذکور مقادیر معنی دار بالاتری را نسبت به شرایط دیم نشان دادند. انجام آبیاری تکمیلی منجر به کاهش دمای سطح برگ و دمای کانوپی گردید. ضرایب همبستگی ساده بین صفات در هر دو شرایط دیم و آبیاری تکمیلی نشان داد که صفات پایداری غشای سلولی، طول برگ پرچم، عملکرد کاه و کلش، محتوای آب نسبی، وزن هزار دانه، محتوای کلروفیل، دمای برگ و دمای کانوپی همبستگی معنی دار بالایی با عملکرد دانه دارند. نتایج تجزیه رگرسیون همچنین نشان داد که صفات عملکرد کاه وکلش و طول برگ پرچم در شرایط دیم و صفات عملکرد کاه و کلش، طول برگ پرچم، محتوای آب نسبی و عملکرد سنبله در شرایط آبیاری تکمیلی وارد مدل رگرسیونی شدند و به ترتیب 741/0 و 899/0 از کل تغییرات مربوط به عملکرد دانه را تبیین نمودند. تجزیه علیت نشان داد که بیشترین اثر مستقیم مثبت به عملکرد کاه و کلش و طول برگ پرچم تحت شرایط دیم و عملکرد کاه و کلش، محتوای آب نسبی، طول برگ پرچم و عملکرد سنبله تحت شرایط آبیاری تکمیلی ارتباط داشت و این امر نشان دهنده اهمیت این صفات بر عملکرد دانه می باشد. در هر دو شرایط، عملکرد کاه و کلش بیشترین اثر مستقیم و مثبت را بر عملکرد دانه دارد.
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