دوره 13، شماره 37 - ( بهار 1400 )
جلد 13 شماره 37 صفحات 184-171 |
برگشت به فهرست نسخه ها
بخش تحقیقات علوم زراعی و باغی،مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی گلستان، سازمان تحقیقات، آموزش و ترویج کشاورزی، گرگان، ایران
چکیده: (1988 مشاهده)
بررسی رابطه بین عملکرد و سایر صفات زراعی، راندمان برنامه‌های اصلاحی را با تعیین معیار انتخاب مناسب، بهبود می‌بخشد. در این راستا تعداد 24 هیبرید جدید آفتابگردان به همراه رقم گلسا به عنوان شاهد در ایستگاه تحقیقات کشاورزی گرگان در قالب طرح لاتیس ساده (5×5) با دو تکرار طی سال زراعی 1399 مورد ارزیابی قرار گرفتند. نتایج نشان داد که بیشترین مقدار همبستگی بین صفات قطر طبق و وزن هزاردانه با عملکرد دانه مشاهده شد. از روش رگرسیون چندگانه گام به گام برای قرار دادن صفات پیش‌بینی کننده در مسیرهای رتبه اول، دوم و سوم بر اساس سهم صفات در توجیه تنوع موجود در عملکرد و نیز حداقل همراستایی صورت گرفت. بر اساس مقادیر تورم واریانس و بزرگی اثرات مستقیم، صفات تعداد دانه در طبق، وزن هزاردانه و قطر ساقه به عنوان متغیرهای رتبه اول انتخاب و 70 درصد از تغییرات عملکرد را توجیه کردند. آزمون t که با استفاده از مقادیر اشتباه معیار بدست آمده از تحلیل بوت استرپ (Bootstrap) انجام شد، حاکی از معنی‌دار بودن تمامی اثرات مستقیم بود. به طور کلی نتایج نشان داد که سه صفت تعداد دانه در طبق، وزن هزاردانه و قطر ساقه می‌توانند به عنوان شاخص انتخاب جهت افزایش عملکرد در آفتابگردان در نظر گرفته شوند. همچنین نتایج نشان داد که در میان ژنوتیپ‌های مورد بررسی، ژنوتیپ‌های شماره 2، 4، 5، 10، 11، 19 و 22 به عنوان ژنوتیپ‌های برتر برای عملکرد دانه و صفات مرتبط با عملکرد شناخته شدند.
نوع مطالعه: پژوهشي |
موضوع مقاله:
اصلاح نباتات، بیومتری
دریافت: 1399/9/30 | ویرایش نهایی: 1400/3/12 | پذیرش: 1399/11/4 | انتشار: 1400/3/11
دریافت: 1399/9/30 | ویرایش نهایی: 1400/3/12 | پذیرش: 1399/11/4 | انتشار: 1400/3/11
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