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| 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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| Beckert, M.; Pollacsek, M.; Caenen, M.. |
| Notre étude a été menée pour analyser les conséquences de la callogenèse et de la régénération de plantes in vitro sur la variabilité génétique de quelques lignées pures de maïs, elles-mêmes manipulables par cette technique. Les techniques de culture in vitro ont été celles proposées par GREEN & PHILLIPS (1975) ; les génotypes utilisés ont été ceux déjà cités par BECKERT & POLLACSEK (1979) et sont principalement : A 34, A 188, A 641, CM 182, CO 158, F 1048, F 1110, ND 203, W 117, WD. Les variations ont été étudiées pour des caractéristiques biométriques incluant des caractères morphologiques (hauteur de plante, hauteur d’insertion d’épis, nombre total de feuilles, surface foliaire...) et des caractères d’intérêt agronomique (précocité... |
| Tipo: Journal Article |
Palavras-chave: VARIATIONS GENETIQUES; CALLOGENESE; REGENERATION; CULTURE IN VITRO. |
| Ano: 1983 |
URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2008baedac1d&uri=/notices/prodinra1/2008/06/ |
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| 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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