Contribution to the taxonomy of little known Tragopogon species endemic to Turkey

Abstract

In the present paper, two little-known species (T. olympicus Boiss. and T. pichleri Boiss.) endemic to Turkey are evaluated in terms of morphology based on numerous authentic and/or new collections. Additionally, the phylogenetic positions of these little-known species are evaluated based on newly generated sequences of nrDNA ITS, trnL and trnL-F. As a result of the morphological examination, lectotypes are designated and documented for both species together with amended diagnosis. The phylogenetic analysis of the ITS data indicates that T. olympicus and T. latifolius Boiss. var. angustifolius are sister taxa, while T. dubius Scop. and T. pichleri are nested together in a different subclade of Tragopogon sect. Majores (Artemcz.) Kuthath s.l. However, neither species is resolved in the cpDNA tree due to low nucleotide diversity. The present results support treating T. olympicus and T. pichleri as members of Tragopogon sect. Sosnovskya Boriss. and Tragopogon sect. Majores, respectively.

Tragopogon davutii‐turanii: a new species of Tragopogon from Anatolia

“… Majority‐rule consensus cladogram of Tragopogon from ML analysis based on a nrDNA ITS dataset (support values: first‐line ML bootstrap and JK jackknife, second‐line pp posterior probability). Clade names are in accordance with those of Gültepe et al (2021), and Clades IV and V are indicated by a thick black bar.…”

“…Since Tragopogon is a relatively new genus with high species diversity and diversification rates, analyses based on molecular markers, including nuclear and plastid DNA, show poor resolution (Bell et al 2012, Mavrodiev et al 2012, Gültepe et al 2021). Besides, even if there is no support and most of the taxa collapse after cutting the 50 % threshold resulting in a polytomy, there are distinct clades in the tree (Fig.…”

“…Amplification and sequencing of nrDNA ITS regions were carried out according to Gültepe et al (2010). Phylogenetic analyses were performed on an ITS dataset consisting of 115 accessions, four of which were newly generated sequences (individuals belonging to the new species), and a sequence belonging to T. vvedenskyi obtained from GenBank (KF050362); 110 sequences, thirteen of which were used as outgroups, were obtained from Gültepe et al (2021).…”

“…Hybridization, commonly followed by polyploidization, between closely related species, blurs the taxonomic relationships within Tragopogon and makes species delimitation challenging (Ownbey 1950, Krahulec et al 2005, Mavrodiev et al 2005, 2007, Suárez‐Santiago et al 2011). Morphological variation within members of Tragopogon has led to different interpretations and misidentifications, and adequate plant material including leaves, flowers, and mature fruits is necessary for accurate identification (Matthews 1975, Coşkunçelebi et al 2020, Gültepe et al 2021).…”

Tragopogon oligolepis’ın Fitokimyasal İçeriği, Antioksidan ve Antiquorum Sensing Özelliğinin Belirlenmesi

“…The genus Tragopogon L. (Asteraceae) contains about 150 species worldwide and widespread in semiarid and mountainous regions of Europe and Asia [1]. 26 taxa belonging to 22 species are distributed throughout Turkey [2]. It is morphologically similar to T. oligolepis Hartvig & Strid is local endemic to the Southwest of Anatolia [3].…”