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Contrasted microcolinearity and gene evolution within a homoeologous region of wheat and barley species Inra
Chantret, N.; Salse, J.; Sabot, F.; Bellec, A.; Laubin, B.; Dubois, I.; Dossat, C.; Sourdille, P.; Joudrier, P.; Gautier, M.F.; Cattolico, L.; Beckert, M.; Aubourg, S.; Weissenbach, J.; Caboche, M.; Leroy, P.; Bernard, M.; Chalhoub, B..
We study here the evolution of genes located in the same physical locus using the recently sequenced Ha locus in seven wheat genomes in diploid, tetraploid, and hexaploid species and compared them with barley and rice orthologous regions. We investigated both the conservation of microcolinearity and the molecular evolution of genes, including coding and noncoding sequences. Microcolinearity is restricted to two groups of genes (Unknown gene-2, VAMP, BGGP, Gsp-1, and Unknown gene-8 surrounded by several copies of ATPase), almost conserved in rice and barley, but in a different relative position. Highly conserved genes between wheat and rice run along with genes harboring different copy numbers and highly variable sequences between close wheat genomes. The...
Tipo: Journal Article Palavras-chave:  .
Ano: 2008 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2009d515ea76&uri=/notices/prodinra1/2009/03/
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Molecular basis of evolutionary events that shaped the Hardness (Ha) locus in diploid and polyploid wheat species (Triticum and Aegilops) Inra
Chantret, N.; Salse, J.; Sabot, F.; Rahman, S.; Bellec, A.; Laubin, B.; Dubois, I.; Dossat, C.; Sourdille, P.; Joudrier, P.; Gautier, M.F.; Cattolico, L.; Beckert, M.; Aubourg, S.; Wessenbach, J.; Caboche, M.; Bernard, M.; Leroy, P.; Chalhoub, B..
The Hardness (Ha) locus controls grain hardness in hexaploid wheat (Triticum aestivum) and its relatives (Triticum and Aegilops species) and represents a classical example of a trait whose variation arose from gene loss after polyploidization. In this study, we investigated the molecular basis of the evolutionary events observed at this locus by comparing corresponding sequences of diploid, tertraploid, and hexaploid wheat species (Triticum and Aegilops). Genomic rearrangements, such as transposable element insertions, genomic deletions, duplications, and inversions, were shown to constitute the major differences when the same genomes (i.e., the A, B, or D genomes) were compared between species of different ploidy levels. The comparative analysis allowed...
Tipo: Journal Article Palavras-chave: GRAIN HARDNESS; GENOME EVOLUTION; DNA RECOMBINATION; WHEAT SPECIES.
Ano: 2005 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD20088be18103&uri=/notices/prodinra1/2009/03/
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