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    Chromosome counts and karyotype analysis of some representatives of genus Cirsium Mill. (Asteraceae) in Turkey
    (Firenze Univ Press, 2018) Polat, Nevra; Kiran, Yasar; Sahin, Ahmet; Yildiz, Bayram; Arabaci, Turan
    The chromosome number and karyotype analysis of nine species (10 taxa) of genus Cirsium Mill. distributed in Turkey were analyzed. The somatic chromosome number of Cirsium sipyleum O. Schwarz, C. candelabrum Griseb., C. creticum d'Urv. subsp. creticum, C. elodes M. Bieb., C. subinerme Fisch. & C. A. Mey., C leucopsis DC., C libanoticum DC. subsp. arachnoideum P. H. Davis & Parris and C. arvense (L.) Scop. were determined as 2n=2x=34. Cirsium pubigerum DC. var. caniforme Petr. and var. paphlagonicum Petr. showed 2n=4x=68 chromosome numbers. The chromosomes of the examined taxa predominantly have median region (m) and rarely median point (M) and submedian region (sm) karyotypes. The chromosome number and morphology of Cirsium sipyleum, C. pubigerum var. paphlagonicum, C. leucopsis and C libanoticum subsp. arachnoideum are newly reported in the present study.
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    Karyological investigation of six Achillea L. (Asteraceae) species growing in Turkey
    (Firenze Univ Press, 2012) Kiran, Yasar; Turkoglu, Ismail; Kirilmaz, Fatma; Arabaci, Turan; Sahin, Ahmet; Bagci, Eyup
    The chromosome number and morphology in six species of the sections Babounya (DC.) O. Hoffm. and Achillea of the genus Achillea L. (Asteraceae) were investigated using karyological techniques. Sample plants and seeds of A. santolinoides Lag. subsp. wilhelmsii (K. Koch.) Greuter, A. falcata L., A. magnifica Hub. - Mor., A. pannonica Scheele, A. crithmifolia Waldst. & Kit. and A. nobilis L. subsp neilreichii (A. Kern.) Formanek were collected from natural habitats in 2005. The chromosome number found in six species was 2n = 18. All chromosomes had median point (M), median region (m), and submedian (sm) centromers. An increase in asymmetry was not observed in the karyotypes of the species studied. None of the studied species had any B chromosomes.
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    Karyological notes on another eight species of Achillea (Asteraceae) from Turkey
    (Springer, 2008) Kiran, Yasar; Arabaci, Turan; Sahin, Ahmet; Turkoglu, Ismail
    The chromosome number and morphology in eight species of the sections Ptarmica (Mill.) W. D. J. Koch, Anthemoideae (DC.) Heimerl, Arthrolepis Boiss., Santolinoideae (DC.) Heimerl and Achillea of the genus Achillea L. (Asteraceae) were investigated using karyological techniques. Sample plants and seeds of A. biserrata M. Bieb., A. fraasii var. troiana Aschers. & Heimerl, A. multifida (DC.) Boiss., A. brachyphylla Boiss. & Hausskn., A. pseudaleppica Hub.-Mor., A. cretica L., A. latiloba Ledeb. ex Nordm., and A. kotschyi Boiss. subsp. kotschyi) were collected from natural habitats in 2003 and 2004. The chromosome number found in seven species was 2n = 18, while only A. kotschyi had 2n = 36. All chromosomes had median point (M), median region (m), and submedian (sm) centromers. In addition, only A. biserrata species had one subterminal (st) chromosome. An increase in asymmetry was not observed in the karyotypes of the species studied. None of the studied species had any B chromosomes.
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    Karyological studies of 10 Cirsium sect. Epitrachys (Asteraceae) species from Turkey
    (Tubitak Scientific & Technological Research Council Turkey, 2013) Yuksel, Eda; Kiran, Yasar; Sahin, Ahmet; Yildiz, Bayram; Arabaci, Turan
    Detailed karyotype properties were established for 10 Cirsium Mill. sect. Epitrachys DC. species distributed in Turkey. The species Cirsium ligulare Boiss., C. sintenisii Freyn, C. boluense P. H. Davis & Parris, C. eriophorum (L.) Scop., C. steirolepis Petr., C. baytopae P. H. Davis & Parris, C. poluninii P. H. Davis & Parris, C. ciliatum (Murray) Moench subsp. szovitsii (K. Koch) Petr., C. ellenbergii Bornm., and C. vulgare (Savi) Ten. have the somatic chromosome number 2n = 2x = 34, whereas C. sintenisii and C. vulgare showed 2n = 4x = 68. The chromosome numbers of C. sintenisii, C. boluense, C. baytopae, C. poluninii, and C. ellenbergii are newly reported here. Karyotype analysis indicated that chromosomes of Cirsium taxa generally have median region (m) and rarely median point (M) and submedian region (sm) karyotypes. The findings for each of the analyzed taxa are compared with the results of previous studies.
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    Karyological studies of eight Carduus L. (Asteraceae, Cardueae) taxa from Turkey
    (Firenze Univ Press, 2016) Gedik, Osman; Kiran, Yasar; Arabaci, Turan; Kostekci, Serkan
    The somatic chromosome numbers and detailed morphometric properties of 18 specimens belonging to eight taxa (six species) of genus Carduus L. distributed in Turkey were examined. The somatic chromosome numbers were determined as 2n = 2x = 22 in C. olympicus Boiss. subsp. hypoleucus (Bornm.) P. H. Davis, C. tmoleus Boiss. subsp. tmoleus and C. acanthoides L. s.l.; 2n = 2x = 18 in C. candicans Waldst. & Kit. s.l. and 2n = 2x = 16 in C. nutans L. subsp. falcato-incurvus P. H. Davis (2798). In addition, tetraploid chromosome numbers (2n = 4x = 32) were also observed in C. nutans subsp. falcato-incurvus (2737) and C. onopordioides Fisch. ex M. Bieb. subsp. turcicus (Kazmi) P. H. Davis. Karyotype analysis indicated that chromosomes of Carduus taxa generally have median region (m) and submedian region (sm) karyotypes. A median point (M) karyotypes is found in C. acanthoides subsp. acanthoides (2728). Secondary structures and one to three pairs of satellite chromosomes (sat-chromosome) were observed in some of the examined specimens. The findings for each of the analysed taxa are compared with the results of previous studies. The chromosome number and morphology of C. olympicus subsp. hypoleucus, C. nutans subsp. falcato-incurvus, C. onopordioides subsp. turcicus, C. candicans subsp. globifer and C. acanthoides subsp. sintenisii are reported here for the first time.
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    Karyological studies on the annual members of the genus Carduus L. (Asteraceae, Cardueae) from Turkey
    (Firenze Univ Press, 2014) Gedik, Osman; Kiran, Yasar; Arabaci, Turan; Kostekci, Serkan
    The somatic chromosome numbers and detailed morphometric properties of eight of the nine annual Turkish Carduus L. taxa were examined. The somatic chromosome numbers were 2n = 2x = 22 in C. rechingerianus Kazmi; 2n = 2x = 28 in C. argentatus L., C. acicularis Bertol. and C. pycnocephalus L. subsp. albidus (M. Bieb.) Kazmi; 2n = 2x = 34 in C. pycnocephalus subsp. arabicus (Jacq. ex Murray) Nyman and subsp. breviphyllarius P. H. Davis; 2n = 2x = 50 in C. nervosus K. Koch.; and 2n = 2x = 62 in C. pycnocephalus subsp. pycnocephalus. Karyotype analysis indicated that chromosomes of the Carduus taxa generally have centromere median region (m), submedian region (sm), and rarely median point (M) of the chromosome. A pair of satellite chromosomes (sat-chromosome) was observed in C. pycnocephalus subsp. breviphyllarius. The findings for each of the analysed taxa are compared with the results of previous studies. The chromosome number and morphology of C. nervosus, C. rechingerianus, C. argentatus, C. pycnocephalus subsp. arabicus and subsp. breviphyllarius are newly reported here.