Faberia Hemsl., a small genus of six species in the tribe Cichorieae, Asteraceae, has been karyologically investigated for the first time. All four studied species were revealed to have the somatic chromosome number 2n = 34, and thus the basic number of the genus was assumed to be x = 17. This rather high basic number has been previously reported very rarely in the tribe, occurring otherwise only in Warionia Benth. & Coss., a monospecific genus endemic to northwestern Africa, and in the American species of Lactuca L. The chromosome morphology was very similar among the four species, with the majority being median centromeric (m) and a few submedian centromeric (sm). In all the karyotypes the chromosomes were medium-sized (6.331.61 mu m), and showed a steady gradation in length from the longest to the shortest, with no evidence of bimodality. Our results strongly support the recognition of Faberia as an independent genus and the inclusion of Faberiopsis Shih & Y. L. Chen in Faberia.
1.Sun Yat Sen Univ, Sch Life Sci, CN-510275 Guangzhou, Guangdong, Peoples R China 2.Chinese Acad Sci, Kunming Inst Bot, Lab Biodivers & Biogeog, CN-650204 Kunming, Peoples R China 3.Chinese Acad Sci, Key Lab Plant Resources Conservat & Sustainable U, S China Bot Garden, CN-510650 Guangzhou, Guangdong, Peoples R China
Liu, Ying,Deng, Tao,Yang, Qin-Er. Karyology of the genus Faberia (Cichorieae-Asteraceae) and its systematic implications[J]. NORDIC JOURNAL OF BOTANY,2012,30(3):365-371.