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Cyto taxonomic studies of the genus scorzonera



Cyto taxonomic studies of the genus scorzonera



Biologicheskii Zhurnal Armenii 33(5): 545-551



The karyology of Scorzonera spp. growing in the Armenian SSR, USSR, was studied. Out of 150 spp. unified by the Scorzonera genus, chromosome numbers were determined for 49 spp. (30%). Most of these species were diploid except for 7 polyploid species, of which 2 tetraploid species, S. bicolor and S. turkeviczii, were presented from the Armenian flora. The species S. laciniata, S. armeniaca, S. calcitrapifolia, S. cana and S. meyeri from the subgenus Podospermum were all diploid, had similar karyotypes and their basic number was x = 7. The species S. suberosa, S. leptophylla and S. turkeviczii (with di- and tetraploid cytoraces) from the subgenus Pseudopodospermum had a symmetric karyotype, and also a basic number x = 7. All data on the karyology of the species from the genus Pseudopodospermum were presented for the 1st time. The species S. seidlitzii, S. latifolia (with B-chromosomes), S. bicolor (with di- and tetraploid cytoraces), S. hissarica and S. rigida from the subgenus Scorzonera also had a symmetric karyotype, but had 2 basic chromosome numbers x = 6 and x = 7. Based on macromorphological, palynologic and karyologic data, the subgenus Podospermum should be regarded as an independant genus and the subgenus Pseudopodospermum should be regarded as a section within the limits of the genus Scorzonera L.

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