naa a22 4500 510731244 CHVBK 20180411082953.0 cr unu---uuuuu 180411e20130401xx s 000 0 eng 10.1007/s11295-012-0567-7 doi (NATIONALLICENCE)springer-10.1007/s11295-012-0567-7 Polyploidy, B chromosomes, and heterochromatin characterization of Mimosa caesalpiniifolia Benth. (Fabaceae-Mimosoideae) [Elektronische Daten] [Saulo de Sousa, Aryane Reis, Lyderson Viccini] Eight populations of Mimosa caesalpiniifolia Benth. were investigated using a cytogenetic approach. Here, we describe for the first time details of the karyotype including chromosome morphology, physical mapping of chromomycin A3 (CMA) 4′,6-diamidino-2-phenylindole (DAPI) and silver staining of nucleolar organizer regions (Ag-NOR banding), as well as 45S rDNA sites. All populations studied showed karyotypes with 2n = 2x = 26 small metacentric and submetacentric chromosomes, although some individuals exhibited 2n = 4x = 52 chromosomes. Moreover, we observed putative additional B chromosomes in some populations. The CMA banding and fluorescent in situ hybridization techniques revealed NOR heteromorphism on the unique pair containing 45 rDNA site (chromosome 12) while the Ag-NOR banding indicated NORs on both cytotypes. Up to two and four nucleoli were observed, respectively, on individuals with 2n = 2x = 26 and 2n = 4x = 52 chromosomes and the differences in nucleolar size seems to be directly related to NOR heteromorphism in some individuals. The data present new and important information to understand karyotypic evolution of Mimosa and Fabaceae. Springer-Verlag Berlin Heidelberg, 2012 Ag-NOR nationallicence Chromosome banding nationallicence Cytogenetics nationallicence Fabaceae nationallicence FISH nationallicence Mimosa caesalpiniifolia nationallicence de Sousa Saulo Genetics Laboratory, Department of Biology, Institute of Biological Sciences, Federal University of Juiz de Fora, 36036-900, Juiz de Fora, Minas Gerais, Brazil aut Reis Aryane Genetics Laboratory, Department of Biology, Institute of Biological Sciences, Federal University of Juiz de Fora, 36036-900, Juiz de Fora, Minas Gerais, Brazil aut Viccini Lyderson Genetics Laboratory, Department of Biology, Institute of Biological Sciences, Federal University of Juiz de Fora, 36036-900, Juiz de Fora, Minas Gerais, Brazil aut Tree Genetics & Genomes Springer-Verlag 9/2(2013-04-01), 613-619 1614-2942 9:2<613 2013 9 11295 https://doi.org/10.1007/s11295-012-0567-7 text/html Onlinezugriff via DOI 1 brief-communication jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11295-012-0567-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- de Sousa Saulo Genetics Laboratory, Department of Biology, Institute of Biological Sciences, Federal University of Juiz de Fora, 36036-900, Juiz de Fora, Minas Gerais, Brazil aut NATIONALLICENCE 700 1- Reis Aryane Genetics Laboratory, Department of Biology, Institute of Biological Sciences, Federal University of Juiz de Fora, 36036-900, Juiz de Fora, Minas Gerais, Brazil aut NATIONALLICENCE 700 1- Viccini Lyderson Genetics Laboratory, Department of Biology, Institute of Biological Sciences, Federal University of Juiz de Fora, 36036-900, Juiz de Fora, Minas Gerais, Brazil aut NATIONALLICENCE 773 0- Tree Genetics & Genomes Springer-Verlag 9/2(2013-04-01), 613-619 1614-2942 9:2<613 2013 9 11295 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer