تنوع ریخت‌شناسی گونه‌های جنس Sargassum در سواحل دریای عمان

نوع مقاله : مقاله پژوهشی

نویسنده

عضو هیأت علمی گروه زیست‌شناسی، دانشکده علوم زیستی، دانشگاه سیستان و بلوچستان، زاهدان، ایران

چکیده

سارگاسوم یکی از پیچیده‌‌ترین جنس‌های جلبک‌های قهوه‌ای است و یکی از بزرگترین جنس‌ها در جلبک‌های قهوه‌ای راسته Fucales، ((Phaeophyceae را تشکیل می‌دهد. سارگاسوم یکی از جلبک‌های قهوه‌ای اقتصادی مهم در خلیج عمان است. در این مطالعه، 23 صفت در 15 جمعیت از 6 گونه سارگاسوم مورد بررسی قرار گرفت. روش جفت گروه بدون وزن با میانگین متوسط (UPGMA)، روش‌های خوشه‌بندی (Ward)، تجزیه و تحلیل به مولفه‌های اصلی (PCA) و تجزیه و تحلیل به مختصات اصلی (PCoA) برای گروه‌بندی نمونه‌های گیاهان براساس خصوصیات مورفولوژیکی انجام شد. تجزیه و تحلیل آماری نشان داد که صفاتی مانند انشعابات رسپتاکل‌ها، نوک برگ و زوائد رسپتاکل از مهمترین صفات تشخیصی در تنوع درون جنسی هستند. به طور کلی دو خوشه اصلی تشکیل شده است. گونه‌ها در این خوشه‌ها به خوبی از هم جدا شده‌اند و درخت UPGMA توانست روابط بین گونه‌ها را به خوبی نشان دهد. روابط گونه‌ای در این خوشه‌ها تقریباً مطابق با طبقه‌بندی‌های جاری این جنس بود.

کلیدواژه‌ها


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