ارزیابی تحمل به تنش کم‌آبی در ژنوتیپ‌های مختلف سویا

نوع مقاله : مقاله پژوهشی

نویسندگان

1 سمت اجرایی ندارم

2 دانش آموخته دانشگاه تهران

3 استادیار بخش تحقیقات اصلاح و تهیه نهال و بذر

4 استادیار دانشگاه ارومیه

چکیده

کم‌آبی یکی از مهم‌ترین عوامل محدود کننده تولید محصولات زراعی، منجمله سویا محسوب می‌شود. به منظور شناسایی و ارزیابی تحمل به تنش‌کم‌آبی، آزمایشی با 40 ژنوتیپ‌ سویا در قالب طرح بلوک‌های کامل تصادفی در دو محیط آبیاری نرمال و تنش کم‌آبی در سال زراعی 1393 در مزرعه پژوهشی موسسه اصلاح و تهیه نهال بذر کرج با سه تکرار پیاده شد. شاخص‌های MP، GMP، HARM و STI بیشترین همبستگی معنی‌دار را با عملکرد در شرایط آبیاری نرمال و تنش کم‌آبی داشتند و به عنوان شاخص‌های برتر برای غربال کردن ژنوتیپ‌های متحمل به تنش شناسایی شدند. پس از ترسیم نمودار بای‌پلات ژنوتیپ‌های D42×Will82، Spry×Savoy/3، Chaleston×Mostang/12 و Liana×L32/2 به عنوان ژنوتیپ‌های متحمل به تنش کم‌آبی و دارای عملکرد بالا تحت شرایط آبیاری نرمال و ژنوتیپ‌های GN 2171، GN 2167، GN 2087 و GN 2011 به عنوان ژنوتیپ‌های حساس به تنش کم‌آبی معرفی شدند. براساس تجزیه خوشه‌ای با استفاده از شاخص‌های MP، GMP، HARM و STI و عملکرد تحت شرایط آبیاری نرمال و تنش کم‌آبی، ژنوتیپ‌های مورد بررسی در چهار گروه دسته‌بندی شدند که اکثر ژنوتیپ‌های متحمل به تنش کم‌آبی در گروه‌های اول و دوم و اکثر ژنوتیپ‌های حساس به تنش کم‌آبی در گروه‌های سوم و چهارم تجزیه خوشه‌ای قرار گرفتند. نتایج تجزیه خوشه‌ای میتواند برای انتخاب ژنوتیپ‌هایی با بیشترین فاصله ژنتیکی به عنوان والدین مطلوب برای دورگ‌گیری و ایجاد جمعیتهای در حال تفرق با حداکثر تنوع ژنتیکی بسیار ارزشمند باشد.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Evaluation of tolerance to water deficit stress in diverse soybean genotypes

نویسندگان [English]

  • Mahnaz Talebkhani 2
  • Hamid Reza Babaei 3
  • Hadi Ali Pour 4
1
2 Graduated student at University of Tehran
3 Assistant Professor at Seed and Plant Improvment Institute
4 Assistant Professor at Urmia University
چکیده [English]

Water deficit is one of the most important factors limiting crop production including soybean. In order to evaluate and identify water deficit tolerant soybean genotypes, 40 soybean genotypes were evaluated in a randomized completely block design (RCBD) with three replications. This study was carried out under both normal and water deficit conditions, in 2015 on the research field of Seed and Plant Improvement Institute-Karaj. MP, GMP, HARM and STI indices which demonstrate the most significant correlation with grain yield in normal and water deficit stress conditions were introduced as the best indices for screening tolerant genotype. Based on biplot graph of first and second principal components, the D42×Will82, Spry×Savoy/3, Chaleston×Mostang/12 and Liana×L32/2 genotypes were introduced as water deficit tolerant genotypes with high grain yield in normal condition and GN 2171, GN 2167, GN 2087 and GN 2011 genotypes were selected as sensitive genotypes to water deficit stress. Based on the result of cluster analysis using MP, GMP, HARM and STI indices and grain yield under normal and water deficit stress condition genotypes were classified in four clusters which the most of tolerant genotypes to water deficit stress were located in the first and second clusters and the most sensitive genotypes to water deficit stress were grouped in the third and fourth clusters. The result of cluster analysis can be valuable in order to selection of genotypes with high genetic distance as parents for hybridization and development of segregating population with maximum variations.

کلیدواژه‌ها [English]

  • Biplot
  • Cluster Analysis
  • soybean
  • drought tolerance indices

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سابقه مقاله

  • تاریخ دریافت: 14 مهر 1395
  • تاریخ بازنگری: 23 اسفند 1395
  • تاریخ پذیرش: 06 خرداد 1396
  • تاریخ انتشار: 01 اسفند 1396

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