ArticleAnnals of botany2008
The ups and downs of genome size evolution in polyploid species of Nicotiana (Solanaceae).
Article in Annals of botany, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 121 papers.
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121 citing papers in PubMed, 315 citations in OpenAlex.
- Forward genetic screening of mutants of the wild diploid ancestor Nicotiana sylvestris identifies aspartate oxidase 2 as a key gene for nicotine biosynthesis in cultivated allotetraploid tobacco (Nicotiana tabacum).The Plant journal : for cell and molecular biology · 2026Article
- The genome and GeneBank genomics of allotetraploid Nicotiana tabacum provide insights into genome evolution and complex trait regulation.Nature genetics · 2025Article
- Differential Gene Expression and Unbalanced Homeolog Expression Bias in 4 Million-Year-Old Allopolyploids of Nicotiana Section Repandae.Genome biology and evolution · 2025Article
- Genomic and cytogenetic analyses reveal satellite repeat signature in allotetraploid okra (Abelmoschus esculentus).BMC plant biology · 2024Article
- Retrospect and prospect ofFrontiers in plant science · 2024Review
- Nuclear phylogeny and insights into whole-genome duplications and reproductive development of Solanaceae plants.Plant communications · 2023Article
- Effects of editing DFR genes on flowers, leaves, and roots of tobacco.BMC plant biology · 2023Article
- Genome Sequence and Analysis of Nicotiana benthamiana, the Model Plant for Interactions between Organisms.Plant & cell physiology · 2023Article
- Down, then up: non-parallel genome size changes and a descending chromosome series in a recent radiation of the Australian allotetraploid plant species, Nicotiana section Suaveolentes (Solanaceae).Annals of botany · 2023Article
- Silencing of a Pectin Acetylesterase (PAE) Gene Highly Expressed in Tobacco Pistils Negatively Affects Pollen Tube Growth.Plants (Basel, Switzerland) · 2023Article
- Phylotranscriptomics supports numerous polyploidization events and phylogenetic relationships inFrontiers in plant science · 2023Article
- The structure of the tetraploid sour cherry 'Schattenmorelle' (Frontiers in plant science · 2023Article
- Analysis of 5S rDNA Genomic Organization Through the RepeatExplorer2 Pipeline: A Simplified Protocol.Methods in molecular biology (Clifton, N.J.) · 2023Article
- PolyploidFrontiers in plant science · 2023Article
- COL2-dependent photoperiodic floral induction inFrontiers in plant science · 2023Article
- Construction of a high-density genetic map and dissection of genetic architecture of six agronomic traits in tobacco (Frontiers in plant science · 2023Article
- Evolution and diversification of the O-methyltransferase (OMT) gene family in Solanaceae.Genetics and molecular biology · 2023Article
- Systematic Identification of Methyl Jasmonate-Responsive Long Noncoding RNAs and Their Nearby Coding Genes Unveils Their Potential Defence Roles in Tobacco BY-2 Cells.International journal of molecular sciences · 2022Article
- A temporal gradient of cytonuclear coordination of chaperonins and chaperones during RuBisCo biogenesis in allopolyploid plants.Proceedings of the National Academy of Sciences of the United States of America · 2022Article
- Global Patterns of Subgenome Evolution in Organelle-Targeted Genes of Six Allotetraploid Angiosperms.Molecular biology and evolution · 2022Article
61 more citing papers are in PubMed but not listed here.
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Authors and funding
7 authors at 3 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundIn 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.
methodsGenome sizes were measured in 18 species of Nicotiana (nine diploids and nine polyploids) ranging in age from <200,000 years to approx. 4.5 Myr old, to determine the direction and extent of genome size change following polyploidy. These data were combined with data from genomic in situ hybridization and increasing amounts of information on sequence composition in Nicotiana to provide insights into the molecular basis of genome size changes. KEY RESULTS AND
conclusionsBy comparing the expected genome size of the polyploid (based on summing the genome size of species identified as either a parent or most closely related to the diploid progenitors) with the observed genome size, four polyploids showed genome downsizing and five showed increases. There was no discernable pattern in the direction of genome size change with age of polyploids, although with increasing age the amount of genome size change increased. In older polyploids (approx. 4.5 million years old) the increase in genome size was associated with loss of detectable genomic in situ hybridization signal, whereas some hybridization signal was still detected in species exhibiting genome downsizing. The possible significance of these results is discussed.
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