تجزیه ارتباطی صفات زراعی در ژنوتیپ‌های آفتابگردان (Helianthus annuus L.) با نشانگرهای SSR در شرایط نرمال و تنش کمبود فسفر

نوع مقاله : علمی پژوهشی

نویسندگان

1 دانش آموخته‌ی کارشناسی ارشد اصلاح نباتات، گروه تولید و ژنتیک گیاهی، دانشکده کشاورزی و منابع طبیعی دانشگاه ارومیه. ارومیه، ایران.

2 . استاد، گروه تولید و ژنتیک گیاهی، دانشکده کشاورزی و منابع طبیعی دانشگاه ارومیه. ارومیه، ایران.

3 استاد، گروه علوم خاک، دانشکده کشاورزی و منابع طبیعی دانشگاه ارومیه. ارومیه، ایران.

4 استادیار، گروه تولید و ژنتیک گیاهی، دانشکده کشاورزی و منابع طبیعی دانشگاه ارومیه. ارومیه، ایران.

10.30473/cb.2020.54699.1819

چکیده

در راستای اصلاح ارقام زراعی فسفر-کارا، 100 ژنوتیپ آفتابگردان روغنی از نقاط مختلف جهان در دو شرایط بهینه و کمبود فسفر (mg/kg 2/7) بر اساس صفات مختلف زراعی در قالب طرح کاملاً تصادفی با سه تکرار در شرایط گلدانی در دانشکده کشاورزی و منابع طبیعی دانشگاه ارومیه در سال زراعی 1396 ارزیابی شدند. در آزمایش مولکولی پروفیل مولکولی افراد با 30 جفت آغازگر میکروستلایت (SSR) تهیه گردید. نتایج نشان داد میانگین همه‌ی صفات از جمله قطر ساقه، عرض برگ، سطح برگ، قطر طبق، میزان کلروفیل و وزن هزار دانه در شرایط کمبود فسفر در مقایسه با شرایط بهینه به طور معنی‌دار کاهش یافته است که نشان دهنده تأثیر منفی کمبود فسفر روی صفات مورد بررسی است. میزان دامنه میزان اطلاعات چند شکل (PIC) در ژنوتیپ‌های مورد مطالعه بین 055/0 برای آغازگر ORS718 تا 687/0 برای آغازگر HA3040 متغیر بود. در تجزیه ساختار جمعیت بر اساس 30 مکان میکروستلایت (SSR)، 2 زیر جمعیت احتمالی (2K=) در پانل ارتباطی شناسایی شد. حدود 15/1 درصد از جفت مکانهای SSR مورد مطالعه به طور معنی‌دار در عدم تعادل پیوستگی بودند (P0.01). در تجزیه ارتباطی صفات بر اساس نشانگرهای SSR با استفاده از مدل خطی مخلوط 17 مکان SSR در هر یک از شرایط بهینه و کمبود فسفر با صفات مورد مطالعه پیوسته بودند. برخی از نشانگرها همچون P807، P608، P307، P718 و P878 بین صفات در شرایط بهینه و تنش کمبود فسفر مشترک بودند. نتایج بدست آمده از این مطالعه، اطلاعات ارزشمندی در زمینه گزینش به کمک نشانگر و مبنای ژنتیکی صفات مورد مطالعه در شرایط تنش کمبود فسفر ارائه می-دهد که می‌توان از این اطلاعات در گزینش افراد طی برنامه‌های بهنژادی و تولید لاین‌های خالص در جهت تحقق تولید ارقام هیبرید جدید آفتابگردان با میزان عملکرد بالا و کارایی فسفر بالا بهره برد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Association analysis for agronomic traits with SSR markers in sunflower (Helianthus annuus L.) genotypes under optimum and phosphorus deficiency conditions

نویسندگان [English]

  • Maryam Rasoulzadeh Aghdam 1
  • Reza Darvishzadeh 2
  • Ebrahim Sepehr 3
  • Hadi Alipour 4
1 M.Sc. in Plant Breeding, Department of Plant Production and Genetics, Faculty of Agriculture and Natural Resources, Urmia University, Urmia, Iran.
2 Professor, Department of Plant Production and Genetics, Faculty of Agriculture and Natural Resources, Urmia University, Urmia, Iran.
3 Professor, Department of Soil Science, Faculty of Agriculture and Natural Resources, Urmia University, Urmia, Iran.
4 Assistant Professor, Department of Plant Production and Genetics, Faculty of Agriculture and Natural Resources, Urmia University, Urmia, Iran.
چکیده [English]

In order to breeding phosphorus-efficient genotypes, 100 sunflower genotypes coming from different parts of the glob were evaluated based on agro-morphological traits under optimal and phosphorus deficient (7.2 mg/kg) conditions in a completely randomized design with three replications in potted conditions in Faculty of Agriculture and Natural Resources, Urmia University in 2017 cropping season. In molecular experiments, the molecular profile of genotypes was prepared with 30 pairs microsatellite (SSR) primers. The results showed that the mean of most studied traits such as stem diameter, leaf wide, leaf surface, chlorophyll rate and 1000 grain weight was reduced significantly in phosphorus deficient conditions compared to optimal ones, which shows that phosphorus deficiency has a negative effect on the studied traits. The polymorphic information content (PIC) in the studied genotypes ranged from 0.055 for ORS718 primer to 0.687 for HA3040 primer. In population structure analysis, based on 30 SSR loci, potentially 2 sub-populations (K=2) were identified in the association panel. About 1.15% of possible SSR locus pairs showed significant level of linkage disequilibrium (P

کلیدواژه‌ها [English]

  • DNA markers
  • Genetic Diversity
  • Linkage disequilibrium
  • phosphorous deficit stress
  • sunflower
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