A comparative analysis of chromosome pairing at metaphase I in interspecific hybrids between durum wheat (Triticum turgidum L.) and the most widespread Aegilops species.

Benavente Barzana, M. Elena and Garcia Agüero, V. and Cifuentes Ochoa, Marta (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", v. 129 (n. 1-3); pp. 124-132. ISSN 1424-8581. https://doi.org/10.1159/000313593.

Description

Title: A comparative analysis of chromosome pairing at metaphase I in interspecific hybrids between durum wheat (Triticum turgidum L.) and the most widespread Aegilops species.
Author/s:
  • Benavente Barzana, M. Elena
  • Garcia Agüero, V.
  • Cifuentes Ochoa, Marta
Item Type: Article
Título de Revista/Publicación: Cytogenetic and Genome Research
Date: January 2010
ISSN: 1424-8581
Volume: 129
Subjects:
Faculty: E.T.S.I. Agrónomos (UPM) [antigua denominación]
Department: Biotecnologia [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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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 × 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 Ut and Ct 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

More information

Item ID: 8468
DC Identifier: http://oa.upm.es/8468/
OAI Identifier: oai:oa.upm.es:8468
DOI: 10.1159/000313593
Official URL: http://content.karger.com/produktedb/produkte.asp?DOI=000313593&typ=pdf
Deposited by: Memoria Investigacion
Deposited on: 19 Aug 2011 08:31
Last Modified: 20 Apr 2016 17:14
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