DE MIGUEL VEGA, Marina; BARTHOLOME, Jérôme; EHRENMANN, François; MURAT, Florent; MORIGUCHI, Yoshinari; UCHIYAMA, Kentaro; UENO, Saneyoshi; TSUMURA, Yoshihiko; LAGRAULET, Hélène; DE MARIA, Nuria; CABEZAS, José-Antonio; CERVERA, Maria-Teresa; GION, Jean Marc; SALSE, Jérôme; PLOMION, Christophe

doi:10.1093/gbe/evv185

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DE MIGUEL VEGA, Marina

BARTHOLOME, Jérôme
Biodiversité, Gènes & Communautés [BioGeCo]

EHRENMANN, François
Biodiversité, Gènes & Communautés [BioGeCo]

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Genome Biology and Evolution. 2015, vol. 7, n° 10, p. evv185

Society for Molecular Biology and Evolution

Resumen en inglés

While recent advances have been gained on genome evolution in angiosperm lineages, virtually nothing is known about karyotype evolution in the other group of seed plants, the gymnosperms. Here we used high density gene-based linkage mapping to compare the karyotype structure of two families of conifers (the most abundant group of gymnosperms) separated around 290 million years ago: Pinaceae and Cupressaceae. We propose for the first time a model based on the fusion of 20 ancestral chromosomal blocks that may have shaped the modern karyotpes of Pinaceae (with n=12) and Cupressaceae (with n=11). The considerable difference in modern genome organization between these two lineages contrasts strongly with the remarkable level of synteny already reported within the Pinaceae. It also suggests a convergent evolutionary mechanism of chromosomal block shuffling that has shaped the genomes of the spermatophytes.< Leer menos

Palabras clave

Pinaceae synteny

Palabras clave en inglés

chromosomal rearrangement

comparative mapping

Cuppressaceae gymnosperm