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- Title
The ups and downs of genome size evolution in polyploid species of Nicotiana (Solanaceae).
- Authors
Leitch, I J; Hanson, L; Lim, K Y; Kovarik, A; Chase, M W; Clarkson, J J; Leitch, A R
- Abstract
In studies looking at individual polyploid species, the most common patterns of genomic change are that either genome size in the polyploid is additive (i.e. the sum of parental genome donors) or there is evidence of genome downsizing. Reports showing an increase in genome size are rare. In a large-scale analysis of 3008 species, genome downsizing was shown to be a widespread biological response to polyploidy. Polyploidy in the genus Nicotiana (Solanaceae) is common with approx. 40 % of the approx. 75 species being allotetraploid. Recent advances in understanding phylogenetic relationships of Nicotiana species and dating polyploid formation enable a temporal dimension to be added to the analysis of genome size evolution in these polyploids.
- Publication
Annals of botany, 2008, Vol 101, Issue 6, p805
- ISSN
1095-8290
- Publication type
Journal Article
- DOI
10.1093/aob/mcm326