University of Isfahan Taxonomy and Biosystematics 3115-9001 13 49 2021 12 22 The Evolutionary Trend of Morphological Characters of Astragalus sect. Alopecuroidei based on Phylogeny of nrDNA ITS and cpDNA trnH-psbA Sequences روند تکامل صفات ریخت‌‌شناسی بخش Alopecuroidei از جنس گون برپایۀ تبارزایی توالی هسته‌‌ای ITS و توالی کلروپلاستی trnH-psbA 67 86 26582 10.22108/tbj.2022.132454.1192 EN Farahnaz Javanmardi Assistant Professor, Department of Biology, Faculty of Basic Sciences, Kazerun Branch, Islamic Azad University, Kazerun, Iran Journal Article 2022 01 23 Astragalus L. (Fabaceae) with over 2500 species is the largest genus of flowering plants on Earth. Astragalus sect. Alopecuroidei DC. with over 50 species is one of the largest sections of the Old World Astragalus represented by 27 taxa in Iran. In the present study, 26 taxa of sect. Alopecuroidei and Astragalus caraganae of sect. Astragalus, as well as two species of sect. Chronopus as outgroups were selected. Seventeen morphological characters for these 29 taxa were analyzed based on phylogeny of nrDNA ITS and cpDNA trnH-psbA. The Maximum Parsimony method was used to construct a phylogenetic tree. The matrix of morphological characters was mapped on the molecular tree using Mesquite version 2.74. The results of the study indicate that, among the previously proposed subsections of Alopecuroidei, subsect, Bibracteolati was monophyletic, but the subsects of Microtropi and Megalotropi were not monophyletic. The evolutionary trend of morphological characters based on molecular phylogeny showed that three characters including the existence of bracteole, length of peduncle, and length of keel limb were synapomorphies for some clades of the Alopecuroidei sect. The other characters indicated the homoplasy (parallelism and reversal) within this section.

https://tbj.ui.ac.ir/article_26582_0a223eac3a4b5989cad53d41ebcad364.pdf