Karyological studies of four endemic Centaurea L. species

Figures & data

Table 1. List and localities of the studied Centaurea species.

Section	Taxon	Locality	Collection number
Pseudoseridia	C. yaltirikii	Düzce; Güzeldere Şelalesi civarı, 594 m, 5 August 2008.	O.Tugay-5601
Incertae sedis (according to Flora of Turkey)	C. leptophylla	Artvin; Yusufeli, Sarıgöl girişi 790 m, 8 August 2007.	O.Tugay-5172-T.Uysal
Chartolepis	C. demirizii	Ağrı; Doğu Beyazıt arası Üç Bulak Köyü, 1800 m, 6 August 2007.	O.Tugay-5102-T.Uysal
Cheirolepis	C. saligna	Erzurum; Karayazı-Göksu yolu, Göksu vadisine inerken, dere yatağı, 2200 m, 30 July 2004.	T.Uysal-891

Table 2. Karyotype formula according to Levan et al. (1964) and characteristics of the studied Centaurea taxa.

Taxa	2n	x	PL	R (SC-LC) (μm)	Ratio LC/SC	p (μm)mean (± SD)	q (μm) mean (± SD)	CL (μm)mean (± SD)	TCL	CImean (± SD)	CF	AI	CVCL	CVCI
C. yaltirikii	18	9	2x	2.61–5.18	1.99	1.30 (± 0.25)	2.18 (± 0.61)	3.48 (± 0.78)	31.31	38 (± 0.06)	4m +5sm	3.64	22.48	16.18
C. leptophylla	36	9	4x	1.36–2.43	1.78	0.67(± 0.15)	1.07 (± 0.22)	1.75 (± 0.33)	31.5	38 (± 0.05)	4m +5sm	2.46	18.95	12.99
C. demirizii	16	8	2x	3.01–6.52	2.17	1.68 (± 0.61)	2.14 (± 0.51)	3.82 (± 1.08)	30.40	44 (± 0.05)	7m + sm	2.99	28.20	10.60
C. saligna	36	9	4x	2.02–3.14	1.55	1.0(± 0.22)	1.43 (± 0.23)	2.43 (± 0.39)	43.7	41 (± 0.04)	3m + sm	1.71	16.25	10.54

Abbreviations: PL, ploidy level; R, range; SC, shortest chromosome length; LC, longest chromosome length; p, mean length of the long short arm; q, mean length of the long arm; CL, mean chromosome length; TCL, total haploid complement length; CI, mean centromeric index; CF, chromosome formula; m, metacentric; sm, submetacentric; SD, standard deviation; AI, karyotype asymmetry index; CV_CL, coefficient of variation of chromosome length; CV_CI, coefficient of variation of centromeric index.

Figure 1. Somatic chromosomes of four species belonging to the genus Centaurea genus. (A) C. yaltirikii; (B) C. leptophylla; (C) C. demirizii; (D) C. saligna.

Figure 2. Idiograms of taxa belonging to the studied taxa. (A) C. yaltirikii; (B) C. leptophylla; (C) C. demirizii; (D) C. saligna.

Figure 3. Karyograms of taxa belonging to the studied taxa. (A) C. yaltirikii; (B) C. leptophylla; (C) C. demirizii; (D) C. saligna.

Levan A, Fredga K, Sandberg AA. 1964. Nomenclature for centromeric position on chromosomes. Hereditas. 52(2):201–220.

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