Karyotype analysis and polyploidy in Palaua and a comparison with its sister group Fuertesimalva(Malvaceae)

作     者：Julio V SCHNEIDER Marilú L HUERTAS 

作者机构：Systematic BotanyBiologie IUniversity of Leipzig Botany and Molecular EvolutionResearch Institute and Natural History Museum Senckenberg and Johann Wolfgang Goethe-Universitt 

出 版 物：《Journal of Systematics and Evolution》 (植物分类学报(英文版))

年 卷 期：2010年第48卷第3期

页      面：175-182页

核心收录：

学科分类：0710[理学-生物学] 07[理学] 09[农学] 071007[理学-遗传学] 0901[农学-作物学] 090102[农学-作物遗传育种] 

基　　金：the Deutsche Forschungsgemeinschaft for providing funds to J.V.SCHNEIDER (DFG Schn 714/1-1) within the SPP 1127 “Radiations–origin of biodiversity” The Friedrich-Ebert Foundation for a Ph.D. studentship to M.L. HUERTAS support from the SYNTHESYS Project(http://www.synthesys.info/) which is financed by theEuropean Community Research Infrastructure Actionunder the FP6 “Structuring the European ResearchArea” Programme (grant to J.V.S., ES-TAF 1879) 

主　　题：autopolyploidy chromosome base number desert fluorochrome staining lomas Malveae Urocarpidium. 

摘      要：Palaua(Malveae,Malvaceae)comprises 15 species endemic to the hyperarid coastal desert of Chile and *** far,chromosome counts have been known for two diploid species(2n=2x=10)*** we report new chromosome numbers for 12 species of Palaua and four of its sister group *** including 4,6-diamidino-2-phenylindole dihydrochloride(DAPI)/chromomycin(CMA3)fluorescent banding are presented for selected species representative of each of the main clades of *** important finding is the discovery of polyploids in one exclusively tetraploid species(***)and four species with mixed diploid and tetraploid cytotypes(***,***,***,and ***).The diploid and tetraploid karyotypes are all unimodal,symmetrical and show one or two pairs of satellite chromosomes with their associated CMA+/DAPI- band depending on the *** some of the tetraploids an autopolyploid origin is suggested.