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AOBPreview originally published online on October 31, 2002
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Annals of Botany 91: 31-38, 2003
© 2003 Annals of Botany Company

First Nuclear DNA C-values for 28 Angiosperm Genera

LYNDA HANSON1, REBECCA L. BROWN1, AMY BOYD1, MARGARET A. T. JOHNSON1 and MICHAEL D. BENNETT*,1

1 Jodrell Laboratory, Royal Botanic Gardens, Kew, Richmond, Surrey TW9 3DS, UK

* For correspondence. Fax +44 (0)20 8332 5320, e-mail m.bennett{at}rbgkew.org.uk

Received: 22 August 2002; Returned for revision: 19 September 2002; Accepted: 25 September 2002    Published electronically: 31 October 2002

This paper reports first DNA C-values for 28 angiosperm genera. These include first DNA C-values for 25 families, of which 16 are monocots. Overall familial representation is 47·2 % for angiosperms, but is now much higher for monocots (75 %) and basal angiosperms (73·1 %) than for eudicots (38·7 %). Chromosome counts are reported for 22 taxa, including first records for six genera plus seven species. Unrepresented families will become increasingly enriched for monotypic taxa from obscure locations that are harder to access. Thus, completing familial representation for genome size for angiosperms may prove impossible in any short period, and progress towards this goal will become slower.

Key words: Nuclear DNA amounts, DNA C-values, angiosperm families, chromosome numbers, monocots, genome size.


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