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- Title
Evidence of intense chromosomal shuffling during conifer evolution.
- Authors
de Miguel, Marina; Bartholomé, Jérôme; Ehrenmann, François; Florent Murat; Yoshinari Moriguchi; Kentaro Uchiyama; Saneyoshi Ueno; Yoshihiko Tsumura; Lagraulet, Hélène; de Maria, Nuria; Cabezas, José-Antonio; Cervera, Maria-Teresa; Gion, Jean Marc; Jérôme Salse; Plomion, Christophe
- Abstract
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.
- Subjects
CONIFERS; PLANT chromosomes; PINACEAE; PLANT evolution; GYMNOSPERMS
- Publication
Genome Biology & Evolution, 2015, Vol 7, Issue 10, p2799
- ISSN
1759-6653
- Publication type
Article
- DOI
10.1093/gbe/evv185