Authors: Miaojuan Zhang Xueli He
Publish Date: 2010/10/06
Volume: 290, Issue: 1-4, Pages: 109-113
Abstract
Chromosome data are important for elucidating intergeneric relationships and delimiting infrafamilial tribes in plants This paper reports karyological data for 12 Seriphidium Bess Poljak species from China of these five count as new reports and the others have been reported elsewhere We also report the tetraploid level in S schrenkianum for the first time The karyotype formulae and types for the five new reports are S schrenkianum Ledeb Poljak 2n = 4x = 36 = 22m + 12sm + 2st S sublessingianum Kell Poljak 2n = 2x = 18 = 14m + 4sm and S transiliense Poljak Poljak 2n = 2x = 18 = 4M + 6m + 2mSAT + 4sm + 2smSAT belong to 2A type S cinum Berg ex Poljak Poljak 2n = 2x = 18 = 8m + 10sm and S sawanense Y R Ling et C J Humphries 2n = 2x = 18 = 10m + 2mSAT + 6sm belong to 2B type Furthermore we estimated karyotype asymmetry in the 12 species by using an intrachromosomal asymmetry index and an interchromosomal asymmetry index The data increase information about the karyosystematics of Seriphidium
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