دوره 12، شماره 34 - ( تابستان 1399 )                   جلد 12 شماره 34 صفحات 92-83 | برگشت به فهرست نسخه ها


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مرکز تحقیقات کشاورزی و منابع طبیعی آذربایجان غربی، سازمان تحقیقات، آموزش و ترویج کشاورزی، ارومیه، ایران
چکیده:   (2517 مشاهده)
    با توجه به کاهش بارندگی‌های سالانه و افزایش خشکی و دمای هوا، ایجاد ارقام متحمل و دارای پتانسیل عملکرد بالا در چغندرقند برای اصلاح‌گران اهمیت بسیاری دارد. بدین منظور برای بررسی تاثیر تنش خشکی بر صفات عملکردی و مورفولوژیکی چغندرقند و بررسی تغییر ارتباط این صفات با عملکرد، در شرایط گلخانه تعداد 140 ژنوتیپ چغندرقند در شرایط گلخانه در دو شرایط نرمال و تنش خشکی در سال 1394 در مرکز چغندرقند کرج از نظر صفات مورفولوژیکی و عملکردی مورد بررسی قرار گرفتند. نتایج نشان داد که اثر ژنوتیپ‌ بجز در صفات مساحت سطح برگ و محتوای نسبی آب برگ در بقیه صفات معنی‌دار بود که نشان‌دهنده وجود تنوع بین ژنوتیپ‌ها است. تنش خشکی باعث کاهش تمامی صفات موردمطالعه شد ولی این کاهش در صفات وزن خشک ریشه، وزن خشک اندام هوایی و وزن خشک کل معنی‌دار نبود. همچنین طول دمبرگ در شرایط تنش همبستگی مثبت و معنی‌داری با صفات مربوط به وزن تر و خشک ریشه و اندام هوایی و طول ریشه نشان داد ولی در شرایط نرمال همبستگی خاصی مشاهده نشد و به نظر می‌رسد که این صفت می‌تواند معیاری برای گزینش ژنوتیپ های مقاوم در شرایط تنش خشکی باشد.
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نوع مطالعه: پژوهشي | موضوع مقاله: اصلاح نباتات
دریافت: 1398/7/1 | ویرایش نهایی: 1399/5/5 | پذیرش: 1399/1/16 | انتشار: 1399/4/10

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