ارتباط بین محتوای کلروفیل برگ و عملکرد دانه تحت شرایط تنش شوری در گندم نان

نوع مقاله : مقاله پژوهشی

نویسندگان

1 کارشناس ارشد، دانشکدۀ کشاورزی، دانشگاه تربیت مدرس

2 دانشیار، دانشکدۀ کشاورزی، دانشگاه تربیت مدرس

3 استاد گروه اصلاح ‌نباتات، دانشگاه کالیفرنیا، آمریکا

چکیده

اندازه‌گیری محتوای کلروفیل برگ معیار مناسبی در برنامه‌های اصلاحی برای افزایش میزان فتوسنتز برگ به‌شمار می‌آید. به‌منظور بررسی ارتباط بین شاخص محتوای کلروفیل و عملکرد در شرایط تنش شوری، 41 ژنوتیپ گندم در مزرعۀ تحقیقاتی مرکز ملی تحقیقات شوری، در دو شرایط نرمال و تنش شوری ارزیابی شدند. شوری آب آبیاری در شرایط نرمال و شور به‌ترتیب 2 و 10 دسی‌زیمنس بر متر بود. نتایج تجزیۀ واریانس نشان داد که ژنوتیپ‎‌های مورد بررسی از نظر صفات محتوای کلروفیل و عملکرد دانه اختلاف معنی‌داری در هر دو شرایط نرمال و تنش شوری داشتند. نتایج مقایسۀ میانگین نشان داد که ژنوتیپ‌های شهریار، روشن و بومی یزد دارای بیشترین میزان عملکرد دانه و همچنین دارای بیشترین محتوای کلروفیل برگ در میان ژنوتیپ‌های مورد بررسی در شرایط تنش شوری بودند. بنابراین می‌توان نتیجه گرفت که در شرایط تنش شوری ژنوتیپ‌های متحمل و دارای عملکرد زیاد از محتوای کلروفیل برگ زیادی برخوردارند. همچنین نتایج همبستگی و تجزیه به عامل‌ها در شرایط تنش شوری نشان‌دهندۀ ارتباط مثبت محتوای کلروفیل برگ با عملکرد دانه بود. بنابراین انتخاب ژنوتیپ‌های با محتوای کلروفیل برگ زیاد در شرایط تنش شوری می‌تواند به انتخاب ژنوتیپ‌های با عملکرد زیاد و متحمل به شوری منجر شود.

کلیدواژه‌ها

عنوان مقاله [English]

Interrelationships between Chlorophyll Content and Seed Yield in Bread Wheat under Saline Conditions

نویسندگان [English]

  • Amir Gholizadeh 1
  • Hamid Dehghani 2
  • Jan Dvorak 3
1 Former Graduate Student, Faculty of Agriculture, Tarbiat Modares University, Tehran
2 Associate Professor, Faculty of Agriculture, Tarbiat Modares University, Tehran
3 Professor, University of California
چکیده [English]

The measurement of chlorophyll content of leaf is as an appropriate criterion in breeding programs to increase the rate of leaf photosynthesis. In order to study the relationship between chlorophyll content and seed yield under saline conditions, 41 wheat genotypes were evaluated in two conditions (normal and salinity stress) at the research field of the National Salinity Research Center (NSRC). The salinity of water used in irrigation in saline and non-saline conditions was 10 and 2 dS.m-1 respectively. The results of the analysis of variance indicated significant differences in bread wheat genotypes for chlorophyll content and seed yield in both the non-saline and saline conditions. According to the results of compare of means, genotypes Shahryar, Rushan and Bumi Yazd had the highest seed yield and also had the highest chlorophyll content among the genotypes under saline conditions. Therefore can be concluded that tolerant genotypes and with high yield had the highest chlorophyll content under saline conditions. Also, the results of correlation and factor analysis indicated that there was a positive relationship between chlorophyll content and seed yield in saline conditions. Therefore, selecting genotypes with high chlorophyll content under salt stress can lead to the selection of genotypes with high yield and salt tolerant.

کلیدواژه‌ها [English]

  • Salinity stress
  • chlorophyll content
  • Seed yield
  • bread wheat

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سابقه مقاله

  • تاریخ دریافت: 18 فروردین 1393
  • تاریخ بازنگری: 09 مرداد 1393
  • تاریخ پذیرش: 08 شهریور 1393
  • تاریخ انتشار: 01 دی 1393

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