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Title of Journal: Plant Syst Evol

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Abbravation: Plant Systematics and Evolution

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Springer Vienna

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DOI

10.1016/0003-9861(92)90657-i

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ISSN

1615-6110

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Nuclear DNA content in the polyploid complex Emph

Authors: Alicia López Andrea F Panseri Lidia Poggio Aveliano Fernández
Publish Date: 2011/07/02
Volume: 296, Issue: 3-4, Pages: 225-
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Abstract

Turnera ulmifolia constitutes a wellstudied polyploid complex with allo and autopolyploid species ranging from 2 to 8x Flow cytometry was used to determine nuclear DNA content and to estimate 2C and 1Cxvalues with the aim of analysing the genome size in Turnera in terms of polyploid speciation The 2Cvalue and 1Cxvalue were evaluated in 12 species of the T ulmifolia complex Nuclear DNA content was estimated by flow cytometry of nuclei stained with propidium iodide The 2C DNA content ranged from 138 to 183 pg in diploids from 267 to 396 pg in tetraploids from 273 to 431 pg in hexaploids and from 353 to 590 pg in octoploids The 1Cxvalue ranged from 044 to 099 pg The Turnera ulmifolia complex showed an increase in total DNA content in the ploidy level but not in the expected proportion The general tendency indicated a decrease in the 1Cxvalue with increasing chromosome number with T grandidentata 4x being an outstanding exception The 1Cxvalues in the allooctoploids T aurelii and T cuneiformis differed by 16fold from each other probably as a result of different evolutionary histories following divergence from the last common ancestor

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