The cytotaxonomy ofEmilia spp. (Asteraceae: Senecioneae) occurring in Brazil |
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Authors: | Marcelo dos Santos Guerra Maria Tereza M Nogueira |
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Institution: | (1) Departamento de Biologia Geral, Centro de Ciências Biológicas UFPE, Cidade Universitária, 50739 Recife-PE, Brazil |
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Abstract: | Analysis of several populations in a large part of the distribution area of the genusEmilia in Brazil has revealed only two species: the diploidE. sonchifolia and the tetraploidE. fosbergii. The more widely reportedE. coccinea was not found. They show a karyotype constancy in morphology and chromosome number (2n = 10 and 2n = 20, respectively), C-banding pattern and number of secondary constrictions. Some indications were found thatE. fosbergii may be an allopolyploid and that its ancestors had different genome sizes. |
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Keywords: | Angiosperms Asteraceae Emilia Chromosome numbers C-banding cytogeography evolution |
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