ارزیابی ژنوتیپ‌های برنج (Oryza sativa L.) بر اساس برخی شاخص‌های مورفوفیزیولوژیک و بیوشیمیایی

نوع مقاله : پژوهشی

نویسندگان

1 گروه زراعت، واحد چالوس، دانشگاه آزاد اسلامی، چالوس، ایران

2 گروه تحقیقات زراعی و باغی، مرکز تحقیقات کشاورزی و منابع طبیعی مازندران، ساری، ایران

چکیده

برنج یکی از مهمترین محصولات غذایی است که غذای ثابت بیش از نیمی از جمعیت جهان را شامل می‌شود. هدف از این مطالعه بررسی خصوصیات فیزیکی و شیمیایی صفاتی نظیر ارتفاع گیاه، طول خوشه، تعداد پنجه مؤثر، تعداد کل دانه، تعداد دانه‎ پر، تعداد دانه پوک، وزن هزار دانه، عملکرد بیولوژیک، عملکرد اقتصادی، شاخص برداشت، شاخص کلروفیل، دوره رشد، فنول کل، ظرفیت آنتی‎اکسیدانی بر اساس 2،2-دی فنیل-1-پیکریل هیدرازیل (DPPH)، با 30 ژنوتیپ برنج در قالب طرح بلوک‎ کامل تصادفی با چهار تکرار در مزرعه تحقیقاتی مؤسسه برنج آمل بود. نتایج نشان داد که ارقام آمل 1 و بیجار از ایران به‌ترتیب دارای فعالیت آنتی‎اکسیدانی و محتوای فنول کل بالاتری نسبت سایر نمونه‎های مرور شده در این تحقیق بودند. بالاترین تعداد دانه کل، پر و وزن هزار دانه در ژنوتیپ IR56 مشاهده شد. ژنوتیپ­ها بر اساس صفات زراعی و با روش UPGMA به پنج خوشه تقسیم شدند. بیشترین میانگین عملکرد مربوط به خوشه چهارم و کمترین آن مربوط به خوشه پنجم بود. تجزیه و تحلیل مؤلفه اصلی، 01/79 درصد از تغییرات کل را توجیه کرد که صفات عملکرد اقتصادی، تعداد دانه کل و تعداد دانه پر بیشترین نقش را ایفا نمودند. دو جزء اصلی، 43 درصد اطلاعات مربوط به داده­های خام از صفات مرتبط با عملکرد را ارائه دادند. نتایج حاصل از این تحقیق نشان داد که استفاده از صفاتی مانند عملکرد اقتصادی، تعداد دانه کل و تعداد دانه پر می­تواند به‌عنوان یک استراتژی اصلاحی جهت نیل به ارقام برنج با عملکرد بالا به کار گرفته شود.

کلیدواژه‌ها


عنوان مقاله [English]

Evaluation of rice (Oryza sativa L.) genotypes based on some morphophysiological and biochemical indices

نویسندگان [English]

  • Nasim Ranjkesh 1
  • Morteza Sam Darili 1
  • Pouria Mazloum 1
  • Amirabbas Mousavi 1
  • Valiollah Rameeh 2
1 Department of Agronomy, Islamic Azad University, Chalous Branch, Chalous, Iran
2 Department of Agronomic and Horticulture Crops Research, Agricultural and Natural Resources Research Center of Mazandaran, Sari, Iran
چکیده [English]

Rice is one of the most important food crop which is the staple food for more than half of the world population. The purpose of this study was to evaluate the physical and chemical properties such as plant height, panicle length, number of effective tillers, total number of grains, number of filled grains, number of unfilled grains, 1000-grain weight, biological yield, economic yield, harvest index, chlorophyll index, growth period, total Phenol (TP), antioxidant capacity based on 2,2-Diphenyl-1-Picryl Hydrazil (DPPH) with 30 rice genotypes in a randomized complete block design in the experimental field of Amol Rice Research Institute. Results showed that Amol 1 and Bijar rice varieties had significantly higher antioxidant activities and total phenolic than the other samples examined in this study, respectively. The highest total number of grains, number of filled grains and 1000-grain weight were observed in genotype IR56. The genotypes were grouped into five clusters based on agronomic traits using UPGMA method. The highest mean of yield was related to the fourth cluster and the lowest of this attribute was related to the fifth cluster. Principal components analysis (PCA) explained 79.01% of variation and economic yield, total number of grains, and number of filled grains played the main Experimental Field role. Two principal components accounted for 43% of the raw data of the yield-related traits. The results of this research indicated that use of economic yield, total number of grains, and number of filled grains could be applied as a breeding strategy to obtain high yield rice cultivars.

کلیدواژه‌ها [English]

  • Antioxidant
  • Bi-plot
  • Cluster analysis
  • principal component analysis
  • Total phenol
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