یافته های نوین در علوم زیستی

فیلوژنی برخی گونه‌های گون (تیره باقلائیان) بر اساس اطلاعات ریخت شناسی

نویسندگان

مهرشید ریاحی
سیما دست برجن
نگین جهانی سه قلعه

گروه علوم گیاهی، دانشکده علوم زیستی، دانشگاه خوارزمی، تهران، ایران

https://doi.org/10.29252/nbr.6.4.505
چکیده
روابط فیلوژنی 39 گونه از سرده گون متعلق به 12 بخشه ابتدایی که در ایران پراکندگی دارند، با استفاده از 29 صفت ریخت‌شناسی مورد مطالعه قرار گرفت. آنالیز کلادیستیک صفات ریخت شناسی به وسیله برنامه PAUP* 4.0b10 انجام گرفت. اطلاعات به دست آمده با اطلاعات حاصل از سیستماتیک مولکولی که بر اساس فاصله انداز بین ژنی هسته ­ای (ITS) قبلا به دست آمده، مقایسه شد. برخلاف مطالعات سیستماتیک مولکولی، بخشه Caraganella به صورت چند نیا با بخشه‌های Cenantrum، Nuculiella و Eremophysa در یک کلاد قرار می‌گیرد. همراه با مطالعات سیستماتیک مولکولی، بخشه‌های Astragalus، Alopecuroidei و Laxiflori، به صورت یک گروه چند نیا در درخت فیلوژنی قرارگرفته ­اند.گونه ­های بخشه Caprini ارتباط نزدیکی با گونه ­های بخشه‌های تک نیا Pelta و Pendulina نشان می‌دهند. آنالیز حاضر تک نیا نبودن برخی از بخشه‌ها را نشان می‌دهد. بنابراین تعریف مرزبندی بخشه‌ها به کمک مطالعات فیلوژنی و ریخت­ شناسی ضروری به نظر می‌رسد.




کلیدواژه‌ها

آنالیز فیلوژنی
بخشه
تک نیا
چند نیا
صفات ریخت­ شناسی

عنوان مقاله English

Phylogeny of some species of Astragalus (Fabaceae) based on morphological data

نویسندگان English

Mehrshid Riahi
Sima DastBarjan
Negin Jahani Seghaleh
Department of Plant Sciences, Faculty of Biological Sciences, Kharazmi University, Tehran, Iran
چکیده English

The phylogenetic relationships among 39 species belonging to 12 sections of Astragalus from Iran were studied on the basis of 29 morphological characters. The cladistics analysis of the morphological data was performed using PAUP* 4.0b10 program. The obtained data were compared with the molecular systematics data obtained from nuclear DNA ITS. In contrast with previous molecular systematic studies, the morphological data placed the sect. Caraganella as paraphyletic clade to the sects. Cenantrum, Nuculiella, and Eremophysa. Our results were similar to those obtained by previous molecular systematic studies which specified sects. Astragalus, Alopecuroidei and Laxiflori as paraphyletic clades. In accordance with data presented in previous molecular systematic studies, the species of the sect. Caprini showed close relationship with those in sects. Pelta and Pendulina. The present analysis, consistent with molecular systematic studies, rejected the monophyly of most sections studied. Therefore, although the circumscription of those sections needs to be carried out on the basis of the results of widely accepted molecular and morphological phylogenetic studies, future studies are needed to clarify and resolve some remaining ambiguities.


کلیدواژه‌ها English

monophyly
morphological characters
phylogenetic analysis
polyphyly
section
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  • تاریخ دریافت 18 خرداد 1405
  • تاریخ انتشار 18 خرداد 1405

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