با همکاری مشترک دانشگاه پیام نور و انجمن بیوتکنولوژی جمهوری اسلامی ایران

نوع مقاله : علمی پژوهشی

نویسندگان

گروه مهندسی تولید و ژنتیک گیاهی، دانشگاه ‏رازی، کرمانشاه، ایران.

چکیده

جوانه‌زنی و سبز‌شدن یکی از مهم‌ترین مراحل رشد گیاه زراعی است. لذا جوانه‌زنی مناسب در محدوده وسیعی از شرایط محیطی برای استقرارگیاهچه ضروری است. در این تحقیق، 20 رقم جو ایرانی و 24 رقم جو اروپایی، به منظور بررسی تحمل تنش شوری در مرحله جوانه‌زنی، در سه سطح شوری (100، 200 و 300 میلی مولار کلریدسدیم) و شاهد (آب مقطر) به صورت آزمایش فاکتوریل براساس طرح کاملاً تصادفی با سه تکرار در اتاقک پرورش قارچ با شرایط دما و نور قابل کنترل و شرایط استریل واقع در مرکز خدمات کشاورزی نوسود و هم‌چنین توسط نشانگر پروتئینی در آزمایشگاه بیوتکنولوژی پردیس کشاورزی و منابع طبیعی دانشگاه رازی ارزیابی شدند. نتایج تجزیه واریانس صفات مرتبط با جوانه زنی نشان داد که اثر شوری، اثر رقم و اثر متقابل شوری× رقم برای سایر صفات مورد بررسی معنی‌دار شد. با افزایش شدت تنش شوری از صفر تا 300 میلی‌مولار، کلیه صفت‌ها و شاخص‌ها به‌جز میانگین زمان جوانه‌‌زنی کاهش یافتند. درصد جوانه‌زنی همبستگی مثبت و معنی‌داری با طول کل گیاهچه، طول ساقه‌چه، شاخص بنیه بذر، میانگین سرعت جوانه زنی و شاخص سرعت جوانه‌زنی داشت. تجزیه رگرسیون گام‌به-گام صفات مختلف با نشانگرهای پروتئینی نشان داد در مجموع 13 نوار مرتبط با صفات مختلف بودند. بیشترین ارتباط معنی‌دار با صفات مربوط به نشانگر‌ 60 کیلودالتون بود که با چهار شاخص بنیه بذر، میانگین سرعت جوانه‌زنی، طول ساقه‌چه و طول کلئوپتیل مرتبط بود. پس از مطالعات اعتبارسنجی و تأیید نتایج، می‌توان از نشانگرهای شناسایی شده در گزینش به کمک نشانگر برای صفات مرتبط استفاده نمود.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Germination of Iranian and European barley cultivars under salinity stress and ‎its relationship with seed storage proteins

نویسندگان [English]

  • Ali Maleki
  • Leila Zarei
  • Sohbat Bahraminejad
  • Kianoosh Cheghamirza
  • Leila Akbari
  • Fardin Fatahi

Department of Plant Production and Genetics, Razi University, Kermanshah, Iran.

چکیده [English]

Germination is one of the most important stages of crop plant growth and proper germination in a wide range of environmental conditions is necessary for plant establishment. In this research, 20 varieties of Iranian barley and 24 varieties of European barley were used in three salinity levels (100, 200 and 300 mM sodium chloride) and a control level (distilled water) in order to investigate the tolerance of salinity stress in the germination stage, as a factorial test based on a completely randomized design with three replications in the mushroom cultivation chamber with controllable temperature and light and sterile conditions in the Nosoud agricultural service center by a protein marker in the biotechnology laboratory of the agriculture and natural resources of Razi university. The results of analysis of variance of traits related to germination showed that the effect of salinity, cultivar and salinity × cultivar were significant for all traits. By increasing the salinity level from 0 to 300 mM, all traits and indices decreased except the average germination time. The germination percentage had a positive and significant correlation with the total seedling length, shoot length, seed germination index, average germination rate and germination rate index. Stepwise regression analysis of different traits with protein markers showed that there were 13 bands associated with different traits. The most significant correlation with traits was related to the 60 kDa marker which was related four indices of seed germ, average germination speed, shoot length and cleoptile length. After the validation studies and confirmation of the results, the identified markers can be used in marker-assisted selection for related traits.

کلیدواژه‌ها [English]

  • Key words:Indices related to germination
  • Protein marker
  • Stepwise regression
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