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A comparative analysis of chromosome pairing at metaphase I in interspecific hybrids between durum wheat (Triticum turgidum L.) and the most widespread Aegilops species.
Cytogenet Genome Res. 2010 Jul; 129(1-3):124-32.CG

Abstract

Homoeologous metaphase I (MI) associations in hybrids between durum wheat and its wild allotetraploid relatives Aegilops neglecta, Ae. triuncialis and Ae. ventricosa have been characterized by a genomic in situ hybridization procedure that allows simultaneous discrimination of A, B and wild species genomes. Earlier results in equivalent hybrids with the wild species Ae. cylindrica and Ae. geniculata have also been considered to comparatively assay the MI pairing pattern of the durum wheat x Aegilops interspecific combinations more likely to occur in nature. The general picture can be drawn as follows. A and B wheat genomes pair with each other less than the 2 wild constituent genomes do in any of the hybrid combinations examined. Interspecific wheat-wild associations account for 60-70% of total MI pairing in all hybrids, except in that derived from Ae. triuncialis, but the A genome is always the wheat partner most frequently involved in MI pairing with the wild homoeologues. Hybrids with Ae. cylindrica, Ae. geniculata and Ae. ventricosa showed similar reduced levels of MI association and virtually identical MI pairing patterns. However, certain recurrent differences were found when the pattern of homoeologous pairing of hybrids from either Ae. triuncialis or Ae. neglecta was contrasted to that observed in the other durum wheat hybrid combinations. In the former case, a remarkable preferential pairing between the wild species constituent genomes U(t) and C(t) seems to be the reason, whereas a general promotion of homoeologous pairing, qualitatively similar to that observed under the effect of the ph1c mutation, appears to occur in the hybrid with Ae. neglecta. It is further discussed whether the results reported here can be extrapolated to the corresponding bread wheat hybrid combinations.

Authors+Show Affiliations

Station de Génétique et d'Amélioration des Plantes, Institut Jean-Pierre Bourgin, Versailles, France.No affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

20551603

Citation

Cifuentes, M, et al. "A Comparative Analysis of Chromosome Pairing at Metaphase I in Interspecific Hybrids Between Durum Wheat (Triticum Turgidum L.) and the Most Widespread Aegilops Species." Cytogenetic and Genome Research, vol. 129, no. 1-3, 2010, pp. 124-32.
Cifuentes M, Garcia-Agüero V, Benavente E. A comparative analysis of chromosome pairing at metaphase I in interspecific hybrids between durum wheat (Triticum turgidum L.) and the most widespread Aegilops species. Cytogenet Genome Res. 2010;129(1-3):124-32.
Cifuentes, M., Garcia-Agüero, V., & Benavente, E. (2010). A comparative analysis of chromosome pairing at metaphase I in interspecific hybrids between durum wheat (Triticum turgidum L.) and the most widespread Aegilops species. Cytogenetic and Genome Research, 129(1-3), 124-32. https://doi.org/10.1159/000313593
Cifuentes M, Garcia-Agüero V, Benavente E. A Comparative Analysis of Chromosome Pairing at Metaphase I in Interspecific Hybrids Between Durum Wheat (Triticum Turgidum L.) and the Most Widespread Aegilops Species. Cytogenet Genome Res. 2010;129(1-3):124-32. PubMed PMID: 20551603.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - A comparative analysis of chromosome pairing at metaphase I in interspecific hybrids between durum wheat (Triticum turgidum L.) and the most widespread Aegilops species. AU - Cifuentes,M, AU - Garcia-Agüero,V, AU - Benavente,E, Y1 - 2010/06/10/ PY - 2010/6/17/entrez PY - 2010/6/17/pubmed PY - 2010/8/7/medline SP - 124 EP - 32 JF - Cytogenetic and genome research JO - Cytogenet Genome Res VL - 129 IS - 1-3 N2 - Homoeologous metaphase I (MI) associations in hybrids between durum wheat and its wild allotetraploid relatives Aegilops neglecta, Ae. triuncialis and Ae. ventricosa have been characterized by a genomic in situ hybridization procedure that allows simultaneous discrimination of A, B and wild species genomes. Earlier results in equivalent hybrids with the wild species Ae. cylindrica and Ae. geniculata have also been considered to comparatively assay the MI pairing pattern of the durum wheat x Aegilops interspecific combinations more likely to occur in nature. The general picture can be drawn as follows. A and B wheat genomes pair with each other less than the 2 wild constituent genomes do in any of the hybrid combinations examined. Interspecific wheat-wild associations account for 60-70% of total MI pairing in all hybrids, except in that derived from Ae. triuncialis, but the A genome is always the wheat partner most frequently involved in MI pairing with the wild homoeologues. Hybrids with Ae. cylindrica, Ae. geniculata and Ae. ventricosa showed similar reduced levels of MI association and virtually identical MI pairing patterns. However, certain recurrent differences were found when the pattern of homoeologous pairing of hybrids from either Ae. triuncialis or Ae. neglecta was contrasted to that observed in the other durum wheat hybrid combinations. In the former case, a remarkable preferential pairing between the wild species constituent genomes U(t) and C(t) seems to be the reason, whereas a general promotion of homoeologous pairing, qualitatively similar to that observed under the effect of the ph1c mutation, appears to occur in the hybrid with Ae. neglecta. It is further discussed whether the results reported here can be extrapolated to the corresponding bread wheat hybrid combinations. SN - 1424-859X UR - https://www.unboundmedicine.com/medline/citation/20551603/A_comparative_analysis_of_chromosome_pairing_at_metaphase_I_in_interspecific_hybrids_between_durum_wheat__Triticum_turgidum_L___and_the_most_widespread_Aegilops_species_ L2 - https://www.karger.com?DOI=10.1159/000313593 DB - PRIME DP - Unbound Medicine ER -