Newly synthesized wheat allohexaploids display progenitor-dependent meiotic stability and aneuploidy but structural genomic additivity
| Autor: | Olivier Coriton, Harry Belcram, Cecile Huneau, Anne-Marie Tanguy, Boulos Chalhoub, Véronique Chagué, Virginie Huteau, Joseph Jahier, Imen Mestiri |
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| Přispěvatelé: | Unité de recherche en génomique végétale (URGV), Institut National de la Recherche Agronomique (INRA)-Université d'Évry-Val-d'Essonne (UEVE)-Centre National de la Recherche Scientifique (CNRS), Amélioration des Plantes et Biotechnologies Végétales (APBV), Institut National de la Recherche Agronomique (INRA)-Université de Rennes (UR)-AGROCAMPUS OUEST, Institut National de la Recherche Agronomique (INRA)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-AGROCAMPUS OUEST, Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro) |
| Rok vydání: | 2010 |
| Předmět: |
0106 biological sciences
Genetic Markers DNA Plant Physiology Aneuploidy Plant Science 01 natural sciences Genome Polymerase Chain Reaction Chromosomes Plant Evolution Molecular Polyploidy 03 medical and health sciences Meiosis Species Specificity Homologous chromosome medicine Aegilops tauschii allopolyploid stability Metaphase Triticum 030304 developmental biology 2. Zero hunger Genetics Gene Rearrangement 0303 health sciences Expressed sequence tag STRUCTURE DU GENOME biology Chromosome food and beverages biology.organism_classification medicine.disease [SDV.BV.PEP]Life Sciences [q-bio]/Vegetal Biology/Phytopathology and phytopharmacy Chromosome Pairing Hybridization Genetic Ploidy Genome Plant 010606 plant biology & botany |
| Zdroj: | New Phytologist New Phytologist, 2010, 186 (1), pp.86-101. ⟨10.1111/j.1469-8137.2010.03186.x⟩ New Phytologist, Wiley, 2010, 186 (1), pp.86-101. ⟨10.1111/j.1469-8137.2010.03186.x⟩ |
| ISSN: | 1469-8137 0028-646X |
| DOI: | 10.1111/j.1469-8137.2010.03186.x⟩ |
| Popis: | International audience; • To understand key mechanisms leading to stabilized allopolyploid species, we characterized the meiotic behaviour of wheat allohexaploids in relation to structural and genetic changes. • For that purpose, we analysed first generations of synthetic allohexaploids obtained through interspecific hybridization, followed by spontaneous chromosome doubling, between several genotypes of Triticum turgidum and Aegilops tauschii wheat species, donors of AB and D genomes, respectively. • As expected for these Ph1 (Pairing homoeologous 1) gene-carrying allopolyploids, chromosome pairing at etaphase I of meiosis essentially occurs between homologous chromosomes. However, the different synthetic allohexaploids xhibited progenitor-dependent meiotic irregularities, such as incomplete homologous pairing, resulting in univalent formation and leading to aneuploidy in the subsequent generation.• Stability of the synthetic allohexaploids was shown to depend on the considered genotypes of both AB and D genome progenitors, where few combinations compare to the natural wheat allohexaploid in terms of regularity of meiosis and euploidy. Aneuploidy represents the only structural change observed in these synthetic allohexaploids, as no apparent DNA sequence elimination or rearrangement was observed when analysing euploid plants with molecular markers, developed from expressed sequence tags (ESTs) as well as simple sequence repeat (SSR) and transposable element sequences. |
| Databáze: | OpenAIRE |
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