Browsing by Author "Genc, Ilker"

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Karyological Studies of Six Taxa of the Genus Allium L. (Amaryllidaceae) From Turkey
(Firenze Univ Press, 2016) Genc, Ilker; Firat, Mehmet
Karyotype structures in representative taxa of the genus Allium L. are compared, based on Feulgen-stained somatic metaphase chromosomes. The karyotypes of Allium arlgirdense, A. anacoleum and A. microspathum (in subg. Allium), and A. rhetoreanum and A. shirnakense (in subg. Melanocrommyum) are described for the first time. The karyological analyses indicate the relationships among the species with respect to asymmetry indices. All Allium taxa studied are diploid with 2n = 2x = 16 chromosomes. One B chromosome is detected in the chromosomes of A. microspathum. All chromosome sets of the studied taxa consist of seven median chromosomes and one submedian chromosomes and all submetacentric pairs bear a satellite on the short arms. The lengths of the chromosomes show remarkable differences particularly at the subgenus level. The three subgenus of genus Allium show a clear tendency to have karyotypes distinct on asymmetry grounds. Karyotype asymmetry relationships are discussed according to the bidimensional scatter plots of A(1)-A(2) and CVCL-M-CA.
Karyological Study of the Genus Gundelia (Compositae) in Turkey
(Firenze Univ Press, 2019) Genc, Ilker; Firat, Mehmet
Karyotypes in 12 taxa of Gundelia are compared, based on Feulgen-stained somatic metaphase chromosomes. The karyotypes of G. anatolica, G. asperrima, G. cilicica, G. colemerikensis, G. dersim, G. glabra, G. komagenensis, G. mesopotamica, G. munzuriensis and G. vitekii are described for the first time. Karyological analyses indicate relationships among the species with respect to their asymmetry indices. All Gundelia species studied were diploid with 2n = 2x = 18 chromosomes. All karyotypes are symmetrical, consisting of metacentric and submetacentric chromosomes. The submetacentric chromosomes of all the investigated specimens contain a secondary constriction. Three chromosome types were identified according to the position of the secondary constrictions. The chromosomes ranged in size from 2.00 mu m to 7.02 mu m. The total haploid chromosome length (THL) varied from 24.97 mu m (G. asperrima) to 42.56 mu m (G. rosea). To determine the karyological relationships among taxa, PCoA (Principal Coordinate Analysis) with six uncorrelated parameters was performed.