Karyotype and gene order evolution from reconstructed extinct ancestors highlight contrasts in genome plasticity of modern rosid crops.
Genome Biol Evol
; 7(3): 735-49, 2015 Jan 29.
Article
em En
| MEDLINE
| ID: mdl-25637221
ABSTRACT
We used nine complete genome sequences, from grape, poplar, Arabidopsis, soybean, lotus, apple, strawberry, cacao, and papaya, to investigate the paleohistory of rosid crops. We characterized an ancestral rosid karyotype, structured into 7/21 protochomosomes, with a minimal set of 6,250 ordered protogenes and a minimum physical coding gene space of 50 megabases. We also proposed ancestral karyotypes for the Caricaceae, Brassicaceae, Malvaceae, Fabaceae, Rosaceae, Salicaceae, and Vitaceae families with 9, 8, 10, 6, 12, 9, 12, and 19 protochromosomes, respectively. On the basis of these ancestral karyotypes and present-day species comparisons, we proposed a two-step evolutionary scenario based on allohexaploidization involving the newly characterized A, B, and C diploid progenitors leading to dominant (stable) and sensitive (plastic) genomic compartments in any modern rosid crops. Finally, a new user-friendly online tool, "DicotSyntenyViewer" (available from http//urgi.versailles.inra.fr/synteny-dicot), has been made available for accurate translational genomics in rosids.
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MEDLINE
Assunto principal:
Genoma de Planta
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Produtos Agrícolas
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Evolução Molecular
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Magnoliopsida
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Ordem dos Genes
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Idioma:
En
Ano de publicação:
2015
Tipo de documento:
Article