ارزیابی تغییرات عملکردی و مورفولوژیکی توده‌های مختلف شنبلیله تحت شرایط تنش کم‌آبی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی دکتری، گروه ژنتیک و بهنژادی گیاهی، دانشکده کشاورزی، دانشگاه تربیت مدرس

2 استاد، گروه ژنتیک و بهنژادی گیاهی، دانشکده کشاورزی، دانشگاه تربیت مدرس

چکیده

این پژوهش با هدف بررسی روابط بین صفات ریشه با عملکرد دانه در توده‌های شنبلیله انجام شد. تعداد 15 توده شنبلیله در دو محیط رطوبتی (عدم‌تنش و تنش خشکی)، در قالب طرح کاملاً تصادفی در سیستم لایسیمتر در گلخانه تحقیقاتی دانشگاه تربیت مدرس، مورد بررسی قرار گرفت. تنش کم‌آبی بر روی تمام صفات، به‌جز درصد ریشه، به اندام هوایی و تعداد شاخه‌های جانبی ریشه تأثیر معنی‌داری داشت. میانگین عملکرد دانه از 71/2 گرم در بوته (شرایط عدم تنش) به 19/1 گرم در بوته (تنش خشکی) کاهش 56 درصدی داشت. ضرایب تنوع ژنتیکی صفات از 12/8 تا 59/50 درصد متغیر بود که حاکی از وجود تنوع ژنتیکی گسترده در مواد ژنتیکی مورد بررسی بود. نتایج نمودارهای بای­پلات نشان داد که دو مؤلفه‌ اصلی، به­ترتیب در شرایط عدم‌تنش و تنش خشکی، 64 و 80 درصد تغییرات داده‌ها را توجیه کردند. همچنین بر اساس این نمودارها، در هر دو شرایط رطوبتی، صفات کارایی تعرق، عملکرد دانه، طول ریشه و وزن خشک ریشه، همبستگی مثبت و بالایی با هم داشتند. توده تیرانچی و شیراز، بهترین توده‌ها در هر دو شرایط رطوبتی از نظر اکثر صفات، به­ویژه عملکرد دانه، بودند.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Evaluation of yield and morphological changes in some Iranian endemic fenugreek ecotypes under non-stress and drought stress conditions

نویسندگان [English]

  • Behnam Hosseini 1
  • Hamid Dehghani 2
  • Mostafa Khodadadi 1
1 Former Ph.D. Student , Plant Genetics and Breeding Department, Faculty of Agriculture, Tarbiat Modares University, Tehran, Iran
2 Professor, Plant Genetics and Breeding Department, Faculty of Agriculture, Tarbiat Modares University, Tehran, Iran
چکیده [English]

The purpose of this study was to investigate the relationship between root traits and grain weight in fenugreek ecotypes. Fifteen fenugreek ecotypes were evaluated under two moisture environments (non-stress and drought stress conditions). The experiment was carried out as a split plot based on a completely randomized design with three replications in lysimetric system at the research glasshouse of Tarbiat Modares University. Water treatment had significant effect on all traits except for percent of root to shoot ratio and root number. Grain weight per plant was decreased 56 % from non-stressed condition (2.71 g) to drought stressed condition (1.19 g). Genotypic coefficients of variation ranged from 8.12 to 50.59 % indicates that there was high genetic variation in studied germplasm. Results of Biplot analysis showed that two main principal components were explained 64 and 80% of the data variation under non-stressed and drought stressed conditions, respectively. Also, results of biplot graphs revealed that there was high positive correlation between transpiration efficiency, grain weight, root length and root dry weight in both water treatments. Tiranchi and Shiraz ecotypes were favorable for many of traits especially for grain weight in both water treatments.

کلیدواژه‌ها [English]

  • Biplot
  • lysimeter
  • Transpiration efficiency
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