جغرافیای سلولی و الگوهای پراکنش جنس چوبک (تیره میخک)

نوع مقاله : مقاله پژوهشی

نویسنده

استاد مؤسسه تحقیقات بیوشیمی و بیوفیزیک دانشگاه تهران، تهران، ایران

چکیده

براساس کارهای فلورستیک جدید نقشه پراکنش جنس چوبک منطبق با ناحیه ایرانی-تورانی است. سه مرکز تنوع با بیشترین تعداد گونه‌ها برای جنس چوبک تشخیص داده شد: نواحی شمال و غرب افغانستان (با 12 گونه متعلق به 5 بخش) ، نواحی جنوبی ترکمنستان (با 13 گونه متعلق به 4 بخش) و ناحیه شمال شرقی ایران (با 14 گونه متعلق به 4 بخش). براساس یافته‌های کروموزومی بیشترین تعداد گونه‌های دیپلویید، تتراپلویید و هگزاپلویید در نواحی جنوبی ترکمنستان، شمال شرقی ایران و غرب افغانستان یافت می‌شوند (مراکز تنوع). بعلاوه نواحی دور از مرکز تنوع شامل گونه‌های پلی‌پلویید هستند که از اجداد دیپلویید مشتق شده‌اند. یافته‌های به‌دست آمده از تراکم و تنوع گونه‌ها، گونه‌های انحصاری، بخشها و مجموعه کروموزومی آنها نشان می‌دهد که غرب افغانستان، جنوب ترکمنستان و شمال شرقی ایران مراکز پیدایش جنس چوبک باشند.

کلیدواژه‌ها


عنوان مقاله [English]

CYTOGEOGRAPHY AND PATTERNS OF DISTRIBUTION OF THE GENUS ACANTHOPHYLLUM (CARYOPHYLLACEAE)

نویسنده [English]

  • Sayed Mahmood Ghaffari
Institute of Biochemistry and Biophysics, University of Tehran, P.O. Box 13145-1384, Tehran, Iran.
چکیده [English]

On the basis of new floristic works, a distribution map of the genus Acanthophyllum is nearly identical to the distribution of Irano-Turanian Region. Three centers of diversity with high numbers of species are distinguished in the genus Acanthophyllum: the western and northern parts of Afghanistan (12 species belonging to 5 sections), southern parts of Turkmenistan (13 species belonging to 4 sections), and north-eastern parts of Iran (14 species belonging to 4 sections). According to the chromosome data, the maximum number of diploids, tetraploid and hexaploid species are found in S Turkmenistan, NE Iran, and W Afghanistan (centers of diversity). Furthermore, the areas far from the centers of diversity contain polyploid species, which are derived from diploid ancestors. The data obtained from the density and diversity of the species, endemics, sections, and chromosome counts seem to indicate that W Afghanistan, S Turkmenistan, and North-east Iran, are the centers of origin of the genus Acanthophyllum

کلیدواژه‌ها [English]

  • Acanthophyllum
  • Caryophyllaceae
  • center of diversity
  • chromosome number
  • cytogeogaphy
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