TY  - JOUR
TI  - New Chromosome Numbers and Karyotype Analysis of Tordylium (Apiaceae) Species with Emphasis on Their Systematics and Evolutionary Significance
AB  - In Turkey, there are eighteen Tordylium (Apiaceae) species out of twenty in the worldwide and seven of them are endemic. In this research, karyotypes of T. apulum, T. pestalozzae, T. syriacum, T. trachycarpum and karyotypes and chromosome numbers of T. cappadocicum, T. aegaeum, T. hasselquistiae, T. ketenoglui (endemic), T. macropetalum (endemic), T. pustulosum (endemic) are provided for the first time. Tordylium species are separated into five cytotypes according to chromosome numbers as 2n=8, 16, 18, 20 and 22. Besides, idiograms of haploid chromosome set, length of the chromosome arms, arm ratios, centromeric index, relative length and haploid karyotype formulas are given. T. ketenoglui has longest chromosome lengths (3.39-1.66 μm) while T. aegaeum has shortest (1.10-0.59 μm). Additionally, principal component analysis (PCA) has been performed by quantified karyological characters. PCA results show that the median type and haploid chromosome length have significant variants among karyological characters. Also, correlation among karyological data, current infrageneric classification and the phylogenetic hypothesis based morphological dataset of Tordylium are discussed. Karyological characters are incompatible with current infrageneric classification, similarly with conflict between the phylogenetic hypothesis and infrageneric classification. In the light of the phylogeny, it could be stated that the ancestral number is 2n=16.
AU  - DOĞAN, Cahit
AU  - OZMEN BAYSAL, EDIBE
AU  - Doğru-Koca, Aslı
AU  - GOMÜRGEN, AYSE NIHAL
AU  - Altınözlü, Haşim
DO  - 10.15671/hjbc.898159
PY  - 2022
JO  - Hacettepe Journal of Biology and Chemistry
VL  - 50
IS  - 2
SN  - 1303-5002
SP  - 99
EP  - 111
DB  - TRDizin
UR  - http://search/yayin/detay/1113949
ER  -