شناسایی گونه های پی تیوم استان همدان و ارزیابی تنوع آن ها با استفاده از نشانگرRFLP

نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه گیاهپزشکی، دانشکده کشاورزی، دانشگاه بوعلیسینا، همدان، ایران.

2 مؤسسه تحقیقات گیاهپزشکی کشور، تهران، ایران.

چکیده

به منظور بررسی تنوع و میزان قرابت و تفاوت های ژنتیکی جدایه های شبه قارچ پی تیوم از شهرها و مناطق مختلف استان همدان، بازدید به عمل آمد و تعداد 150 جدایه جمع آوری و مورد بررسی قرار گرفت که بر اساس ریخ ت شناسی 12گونه شناسایی شد. تعداد 8 جدایه پی تیوم که دارای اسپورانژیوم گرد بودند انتخاب و برای مقایسه آ ن ها از نشانگر RFLPاستفاده گردید که در نهایت از تاثیر آنزیم های برشی روی جدایه ها، 36 باند بدست آمد که طول این نواحی از 350 تا 1000کیلو جفت باز متغیر بود. جدایه ها در 3 گروه و 7 کلاد قرار گرفتند . گونه هایP. tracheiphilum وPythium group Gشباهت 100 درصدی را نشان دادند که احتمالا هر دو جدایه از یک دودمان ژنتیکی هستند. بیشترین تفاوت درون گونه ای راpyrilobum  .P.وirregulare P.به ترتیب با 80 و 65 درصد آشکار ساختند.

کلیدواژه‌ها


عنوان مقاله [English]

Identification Pythium species from Hamedan province and evaluation of their diversity using RFLP marker

نویسندگان [English]

  • P. Abad 1
  • D. Zafari 1
  • M. Mirabolfathi 2
چکیده [English]

To investigate the diversity and the range of genetic differences and similarities of isolates of pseudo-fungus Pythium spp., different regions of Hamadan province were searched, 150 isolates were collected and thereafter 12 species were identified based on morphological characters. Eight Pythium isolates with spherical sporangium were selected and compared using RFLP marker. Finally, restricted digestion of amplified ITS1-5.8S-ITS2 region resulted in 36 bands with a length ranging 350 to 600 kpb. Accordingly the isolates were placed in 3 groups and 7 clades. Pythium group G and P. tracheiphilum were identical thereby implying common ancestry. The most intraspecific distances were observed in P. pyrilobum and P. irregulare measuring 80 percent and 65 percent respectively.

کلیدواژه‌ها [English]

  • Pythium
  • Hamedan
  • RFLP
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