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Cytotaxonomic analysis of South American species of Vernonia (Vernonieae: Asteraceae)

Chromosome numbers in 48 populations belonging to 31 species of Vernonia from South America have been determined. First chromosome counts are reported for V. propinqua var. canescens (2n = 20), V. sceptrum (2n = 80), V. rufogrisea (2n = 32), V. heringeri (2n = 32), V. hovaefolia (2n = 64), V. hystri...

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Published in:	Botanical journal of the Linnean Society 2002-08, Vol.139 (4), p.401-408
Main Author:	DEMATTEIS, MASSIMILIANO
Format:	Article
Language:	English
Subjects:	aneuploidy chromosome numbers classification polyploidy Vernonia Vernonia heringeri Vernonia hovaefolia Vernonia hystricosa Vernonia obtusata Vernonia propinqua Vernonia pseudoincana Vernonia rubricaulis Vernonia rufogrisea Vernonia rugulosa Vernonia sceptrum
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description	Chromosome numbers in 48 populations belonging to 31 species of Vernonia from South America have been determined. First chromosome counts are reported for V. propinqua var. canescens (2n = 20), V. sceptrum (2n = 80), V. rufogrisea (2n = 32), V. heringeri (2n = 32), V. hovaefolia (2n = 64), V. hystricosa (2n = 128), V. obtusata (2n = 64), V. pseudoincana (2n = 32), V. rubricaulis var.◊australis (2n = 64) and V. rugulosa (2n = 30). The basic chromosome numbers x = 10, 14, 15, 16 and 17 were confirmed for New World species of Vernonia. Together with previous records, these numbers suggest that the evolution of Vernonieae has occurred through a combination of polyploidy and aneuploidy. Taxonomic implications of certain counts are also discussed. © 2002 The Linnean Society of London, Botanical Journal of the Linnean Society, 2002, 139, 401–408.
doi_str_mv	10.1046/j.1095-8339.2002.00074.x
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subjects	aneuploidy chromosome numbers classification polyploidy Vernonia Vernonia heringeri Vernonia hovaefolia Vernonia hystricosa Vernonia obtusata Vernonia propinqua Vernonia pseudoincana Vernonia rubricaulis Vernonia rufogrisea Vernonia rugulosa Vernonia sceptrum
title	Cytotaxonomic analysis of South American species of Vernonia (Vernonieae: Asteraceae)
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