MORPHOLOGICAL CHARACTER EVOLUTION OF ONOSMA (BORAGINACEAE) IN IRAN, BASED ON NUCLEAR AND PLASTID DNA SEQUENCES

Document Type : Research Paper

Authors

1 Department of Plant Biology, Faculty of Biological Sciences, Tarbiat Modares University, Tehran 14115-154, Iran.

2 Research Institute of Forests and Rangelands, Agricultural Research, Education and Extension Organization, (AREEO), P. O. Box 13186-116, Tehran, Iran.

Abstract

Onosma is taxonomically a problematic genus and its infrageneric delimitation is not clear. Using nuclear (ITS) and two plastid (rpl32-trn L(UAG) and trnH–psbA) markers on 87 species of Onosma throughout their distribution range, phylogenetic relationships within Onosma was reconstructed. Morphological character evolution was mapped on the previously studied nr DNA ITS tree. In the NeighborNet analaysis, the groups formed in the splits graph are correlated to the clades retrieved in the phylogenies. The results suggested that O. rostellata is more closely related to Sino-Indian species of Onosma. Among 10 morphological characters selected, six characters including basic chromosome number, type of indumentum, corolla length, nectar trichome, sectioned calyx and calyx cleft represent the most important synapomorphies for Onosma species.

Keywords


Article Title [Persian]

تکامل صفات ریخت‌شناسی بر روی سرده (Boraginaceae) Onosma در ایران، براساس توالی‌های هسته‌ای و کلروپلاستی

Authors [Persian]

  • فاطمه نصرالهی 1
  • شاهرخ کاظم‌پور اوصالو 1
  • الهام امینی 1
  • ولی‌اله مظفریان 2
1 گروه زیست‌گیاهی، دانشکده علوم زیستی، دانشگاه تربیت مدرس، تهران، ایران
2 مؤسسه تحقیقات جنگل‌ها و مراتع کشور، سازمان تحقیقات، آموزش و ترویج کشاورزی، تهران، ایران
Abstract [Persian]

Onosma از لحاظ تاکسونومی سرده مشکلی است و تعیین حدود فرو سرده‌ای آن به‌طور واضح مشخص نیست. در این مطالعه روابط فیلوژنی با استفاده از نشانگر هسته‌ای (ITS) و دو نشانگر کلروپلاستی rpl32-trnL(UAG)) و (trnH–psbA بر روی 87 گونه از سرده Onosma از مناطق پراکنش مختلف بویژه ایران بازسازی شد. آنالیز شبکه فیلوژنتیک نشان داد که گروه‌های تشکیل شده بر کلادهای درختان فیلوژنی منطبق هستند. نتایج نشان می‌دهد که O. rostellata بیشتر به گونه‌های هندی-چینی Onosma مرتبط است. تحلیل صفات ریخت‌شناسی نشان داد که آنها در میان گونه‌های Onosma چندین بار تکامل پیدا کرده است، لذا میزان بالایی از هموپلازی را نشان دادند. از میان 10 صفت ریخت‌شناسی انتخاب شده، شش تا شامل عدد پایه کروموزومی، نوع کرک، طول جام، کرک در حلقه نوشجای، طویل شدن کاسه بعد از گلدهی و بریدگی کاسه گل در میان گونه‌ها مهمترین صفات پیشرفته مشترک می‌باشند.

Keywords [Persian]

  • Boraginaceae
  • Character evolution
  • Morphology
  • NeighborNet analaysis
  • Onosma
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