Chantret N., Salse J., Sabot François, 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 P. (2008). Contrasted microcolinearity and gene evolution within a homoeologous region of wheat and barley species. Journal of Molecular Evolution, 66 (2), 138-150. ISSN 0022-2844.
Titre du document
Contrasted microcolinearity and gene evolution within a homoeologous region of wheat and barley species
Année de publication
2008
Auteurs
Chantret N., Salse J., Sabot François, 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 P.
Source
Journal of Molecular Evolution, 2008,
66 (2), 138-150 ISSN 0022-2844
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 coding sequence evolution appeared to be submitted to heterogeneous selective pressure and intronic sequences analysis revealed that the molecular clock hypothesis is violated in most cases.
Plan de classement
Amélioration des plantes, ressources génétiques [076AMEPLA]
Localisation
Fonds IRD [F B010080673]
Identifiant IRD
fdi:010080673
