tailieunhanh - Cytogenetic studies on some Scorzonera L. s.l. (Asteraceae) taxa from Turkey

In the present study, chromosome morphology of 32 Scorzonera L. taxa, including 19 species endemic to Turkey, was analyzed. The plant materials were collected from different natural populations of Turkey between 2005 and 2011. | Turkish Journal of Botany Turk J Bot (2015) 39: 429-438 © TÜBİTAK doi: Research Article Cytogenetic studies on some Scorzonera L. . (Asteraceae) taxa from Turkey 1, 1 2 3 Fahim ALTINORDU *, Esra MARTİN , Serdar MAKBUL , Kamil COŞKUNÇELEBİ , Mutlu GÜLTEPE 1 Department of Biotechnology, Faculty of Science, Necmettin Erbakan University, Konya, Turkey 2 Department of Biology, Faculty of Arts and Sciences, Recep Tayyip Erdoğan University, Rize, Turkey 3 Department of Biology, Faculty of Science, Karadeniz Technical University, Trabzon, Turkey Received: Accepted: Published Online: 3 Printed: Abstract: In the present study, chromosome morphology of 32 Scorzonera L. taxa, including 19 species endemic to Turkey, was analyzed. The plant materials were collected from different natural populations of Turkey between 2005 and 2011. The classification of chromosomes, the length of the long and short arm, haploid chromosome length, arm ratio, and relative chromosomal length were measured by software image analyses. The basic chromosome numbers were determined as x = 6 and x = 7. Two types of ploidy levels were observed as diploidy and tetraploidy. Karyotype asymmetry indices, TF%, As K%, Syi, Rec, A, A1, and A2 were also calculated. Scorzonera ahmet-duranii & Coskuncelebi, S. laciniata subsp. calcitrapifolia (Vahl) Marie, and Scorzonera suberosa subsp. cariensis (Boiss.) Chamberlain had the most symmetrical karyotypes for the subgenera Scorzonera L., Podospermum (L.) DC., and Pseudopodospermum (Lipsch. & Krasch.) Lipsch., respectively. Key words: Asteraceae, cytogenetic, karyotype, karyotype asymmetry, Scorzonera 1. Introduction The family Asteraceae is the richest vascular plant family in the world with 1600–1700 genera and 24,000–30,000 species. Many naturalized members of Asteraceae have been recorded in recent years (Funk et al., 2005; .