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Wheat, coffee, oilseed rape, grappe, banana

DossierPlant Genomics

​​​​​Polyploidization is a recurrent theme in eukaryote genome evolution. Many extant species have undergone a polyploidization in their recent past (particularly plants), and the advent of comparative genomics has revealed ancient duplication events in organisms not previously known to have a polyploid ancestor (like vertebrate animals and some fungi; Putnam N.H. et al., Nature 453:1064 (2008); Jaillon O. et al. Nature 431:946 (2004); Kellis et al. Nature 428:617 (2003)). Many duplicated genes are lost after a whole-genome duplication (WGD), to the point that in old polyploids, only a small number of genes are still present in duplicate. In plants, polyploidization is hypothesized to have had a huge impact on speciation and evolution of novel traits. Our group has previously published important findings on plant evolution through the grapevine genome sequence analysis. We developed this thematic recently by studying the duplicated past of Cacao, banana and Clementina (Genome analysis reveals the origins of domesticated Citrus species. Gmitter F., et al., submitted). Two other genomes are being analysed, the highly poilyploid rapeseed and the ancestral organization from coffee tree.

Published on 10 November 2016