Deconstruction of the (paleo)polyploid grapevine genome based on the analysis of transposition events involving NBS resistance genes.

ABSTRACT: Plants have followed a reticulate type of evolution and taxa have frequently merged via allopolyploidization. A polyploid structure of sequenced genomes has often been proposed, but the chromosomes belonging to putative component genomes are difficult to identify. The 19 grapevine chromosomes are evolutionary stable structures: their homologous triplets have strongly conserved gene order, interrupted by rare translocations. The aim of this study is to examine how the grapevine nucleotide-binding site (NBS)-encoding resistance (NBS-R) genes have evolved in the genomic context and to understand mechanisms for the genome evolution. We show that, in grapevine, i) helitrons have significantly contributed to transposition of NBS-R genes, and ii) NBS-R gene cluster similarity indicates the existe

SUBMITTER: Malacarne G 

PROVIDER: S-EPMC3256180 | biostudies-literature | 2012

REPOSITORIES: biostudies-literature