Cytotaxonomy of Dubyaea glaucescens (Compositae–Cichorieae) |
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| Authors: | Ying Liu Qin‐Er Yang |
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| Institution: | 1. State Key Lab of Biocontrol and Guangdong Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat‐sen Univ., , Xingangxi Road, CN‐510275 Guangzhou, PR China;2. Key Lab of Plant Resources Conservation and Sustainable Utilization, South China Botanical Garden, Chinese Academy of Sciences, , Xingke Road, Tianhe District, CN‐510650 Guangzhou, PR China |
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| Abstract: | Recent molecular phylogenetic analyses indicate that Dubyaea glaucescens (Compositae–Cichorieae) should be transferred to the genus Faberia as F. glaucescens. Here, we present cytological evidence for this transfer. Dubyaea glaucescens comprises two ploidy levels, 2n = 34 (diploid) and 2n = 51 (triploid), making the basic chromosome number x = 17. The chromosomes vary in length from 5.82 μm to 2.11 μm, and the karyotypes are 2n = 20m + 14sm (3sat) for the diploid cytotype and 2n = 30m + 21sm (3sat) for the triploid cytotype. Karyological characters of D. glaucescens, including chromosome number, size, morphology, and karyotype asymmetry, all agree remarkably with those reported previously in Faberia, but are distinct from those in other species of Dubyaea. The transfer of D. glaucescens to Faberia is thus strongly corroborated. |
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