New Chromosome Numbers and Karyotype Analysis of Tordylium (Apiaceae) Species with Emphasis on Their Systematics and Evolutionary Significance

Authors : Nihal GÖMÜRGEN, Aslı DOĞRU KOCA, Edibe ÖZMEN BAYSAL, Cahit DOĞAN, Haşim ALTINÖZLÜ

Pages : 99-112

Doi:10.15671/hjbc.898159

View : 23 | Download : 11

Publication Date : 2022-02-28

Article Type : Research Paper

Abstract :In Turkey, there are eighteen Tordylium insert ignore into journalissuearticles values(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 insert ignore into journalissuearticles values(endemic);, T. macropetalum insert ignore into journalissuearticles values(endemic);, T. pustulosum insert ignore into journalissuearticles values(endemic); are provided for the first time. Tordylium species were 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 insert ignore into journalissuearticles values(3,39–1,66 µm); while T. aegaeum has shortest insert ignore into journalissuearticles values(1,10–0,59 µm);. Additionally, principal component analysis insert ignore into journalissuearticles values(PCA); was performed by quantitified karyological characters. PCA results showed that the median type and haploid chromosome length have significant variants among karyological characters. Also, it is discussed correlation among karyological data, current infrageneric classification and the phylogenetic hypothesis based morphological dataset of Tordylium. 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 can be said that the ancestral number is 2n=16.
Keywords : cytotypes, karyotype evolution, principal component analysis, Tordyliinae