ارزیابی شاخص‌های تحمل به شوری برخی ژنوتیپ‌های گندم نان در مرحله‌ی گیاهچه‌

نوع مقاله: پژوهشی

نویسندگان

1 دانش آموخته کارشناسی ارشد گروه اصلاح نباتات دانشکده کشاورزی و منابع طبیعی دانشگاه آزاد اسلامی واحد کرج، کرج، ایران.

2 استادیار مؤسسه تحقیقات اصلاح و تهیه نهال و بذر کرج، ایران.

3 استادیار گروه زراعت دانشکده کشاورزی و منابع طبیعی دانشگاه آزاد اسلامی واحد کرج، کرج، ایران.

چکیده

به منظور ارزیابی شاخص‌های تحمل به شوری17 رقم تجاری و34 لاین بومی گندم نان برابر شوری حاصل از کلرید سدیم، آزمایشی در سال زراعی 1391 به صورت فاکتوریل در قالب طرح پایه بلوک‌های کامل تصادفی در دو تکرار و در سطوح شوری صفر، 8 و 16 دسی‌زیمنس­بر متر، در سطح گلخانه انجام گردید. در این بررسی، وزن خشک کل گیاهچه اندازه‌گیری شد. برای ارزیابی تحمل به شوری ژنوتیپ­ها، از شاخص­های حساسیت به تنش، شاخص تحمل، شاخص تحمل به تنش، شاخص میانگین هندسی و شاخص میانگین تولیداستفاده شد. در این بررسی با توجه به شاخص‌هایبهره‌وری متوسط یا میانگین تولید، شاخص میانگین هندسی و شاخص تحمل به تنش ژنوتیپ‌های 4452 فراهان، 4468 ساروق، 4678 ترفان، پارسی، 2745 رضائیه و نیشابور به عنوان ژنوتیپ‌هایی که در هر دو شرایط شاهد و تنش شوری دارای زیست­توده بالایی می‌باشند، شناسایی شدند، به همین جهت می‌توان از این ژنوتیپ‌ها هم در مناطق شور و هم در مناطق غیرشور و یا حتی در مناطقی که شور یا غیرشور بودن آن‌ها مشخص نیست، استفاده کرد، زیرا در هر دو شرایط تنش و نرمال، عملکرد بیولوژیک بالایی دارند. از طرف دیگر مشاهده شد که ژنوتیپ‌های روشن، MV–17، 22762، زارع، 22919، 2664 آذربایجان و 1856 مهاباد دارای کمترین میزان شاخص تحمل به تنشو شاخص حساسیت به تنشمی‌باشد و از این ژنوتیپ‌ها معمولاً در شرایط تنش شوری استفاده می‌شود، زیرا دارای عملکرد بیولوژیکبالایی در شرایط تنش هستند.

کلیدواژه‌ها


عنوان مقاله [English]

Evaluation of salinity toleranceindices in some bread wheat genotypes at seedling stage

نویسندگان [English]

  • Sepideh Biriyay 1
  • Manouchehr Khodarahmi 2
  • Davood Habibi 3
1 Master of plant breeding Department of Plant Breeding College of Agriculture and Natural Resources Islamic Azad University Karaj Branch Karaj, Iran
2 Assistant professor Research Institute of Seed and Plant Breeding Karaj, Iran
3 Assistant professor Department of Agriculture College of Agriculture and Natural Resources Islamic Azad University Karaj Branch Karaj, Iran
چکیده [English]

To evaluate of salinity tolerance indices in 17 commercial cultivars and 34 lines ofbread wheat against salinity of sodium NaCl, an experiment was conducted in growing season of 2012 in factorial experiment based on randomized complete block with two replications and in salt concentration of 0, 8 and 16 ds m in the greenhouse. In this study, total plant dry weight was measured. To assess the salt tolerance of genotypes stress susceptibility (SSI), tolerance (TOL), stress tolerance (STI), geometric mean productivity(GMP) and the mean productivity (MP) indices were used. In this study, regarding to the indices of MP, GMP and STI, Farahan 4452, Saruq 4468, Trfan4678, Parsi, Rezaieh 2745 and Nishapur genotypes identified to have the highest yield in both control and salt stress conditions. Therefore, they can be used in salineandnon-salineoruncertain areas, also because they had highbiologicalyield. On the other hand, it was observed that Roshan, MV-17, 22762, Zarea, 22919, Azerbaijan 2664 and Mahabad 1856genotypeshad the lowest rate of TOL and SSI indicesandthey can be grown in saline areasbecauseof having highbiological yieldin stress condition.

کلیدواژه‌ها [English]

  • common wheat
  • Triticumaestivum
  • stress tolerance
  • germinationindex
  • Biological yield
  • biomass
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