Özet:

Asteraceae family Centaurea L. is a species that hosts systematic discussions and needs to be illuminated taxonomic problems in the light of molecular techniques that have evolved in recent years. In particular, the taxonomic position of the Centaurea depression type is controversial and it has been claimed that it should be in the Cyanus species by some researchers. To reveal this problem, the philogenetic relationships of the five species of the gender (C. depression, C. iberica, C. solstitialis, C. virgata, C. balsamita) are found in the chloroplast DNA and preferred in philogenetic studies by using the trnT(UGU) - trnL(UAA) IGS, trnL5'- trnL3' intron and trnL(UAA) - trnF(GAA) IGS regions. DNA sequences of some species of the gender were added to the analysis by taking from the NCBI database and attempted to illuminate the evolutionary relations within the gender of both C. depression and the other four species studied. Filogenetic trees are created with the methods of maximum probability (ML) and maximum parsimony (MP). trnT(UGU) - in trees created for trnL(UAA) and trnL5'-trnL3' intron areas, the C. depression species has not been filogenetically separated from other related species. TrnL(UAA) - TrnF(GAA) IGS is not able to obtain adequate quality sequences in our study, this area is not detailed.

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