Spontaneous wheat-Aegilops biuncialis, Ae. geniculata and Ae. triuncialis amphiploid production, a potential way of gene transference

Some F1 hybrid plants between three species of the Aegilops genus and different hexaploid wheat Triticum aestivum cultivars show certain self-fertility, with averages of F1 hybrids bearing F2 seeds of 8.17%, 5.12% and 48.14% for Aegilops biuncialis, Aegilops geniculata and Aegilops triuncialis respectively. In the Ae. triuncialis-wheat combination with 'Astral' wheat cultivar, the fertility was higher than that found in the other combinations. All the F2 seeds studied were spontaneous amphiploids (2n=10x=70). The present study evidences the possibility of spontaneous formation of amphiploids between these three Aegilops species and hexaploid wheat and discusses their relevance for gene transference. Future risk assess-ment of transgenic wheat cultivars needs to evaluate the importance of amphiploids as a bridge for transgene introgression and for gene escape to the wild.

Bibliographic Details

Main Authors:	Loureiro Beldarrain, Iñigo, Escorial Bonet, María Concepción, García-Baudin, J. M., Chueca, M. C.
Format:	journal article biblioteca
Language:	English
Published:	CSIC - Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA) 2009
Subjects:	Aegilops, Hybrid self-fertility, Risk assessment, Triticum aestivum, Wild relatives,
Online Access:	http://hdl.handle.net/20.500.12792/2513 http://hdl.handle.net/10261/293339
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