HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Figures Only Full Text Free Full Text (PDF) Free Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in ISI Web of Science Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via ISI Web of Science (1) Citing Articles via Google Scholar Google Scholar Articles by Zaharieva, M. Articles by Monneveux, P. Search for Related Content PubMed Articles by Zaharieva, M. Articles by Monneveux, P. Agricola Articles by Zaharieva, M. Articles by Monneveux, P. Related Collections Wheat Plant Genetic Resources Crop Genetics

REVIEW & INTERPRETATION

Spontaneous Hybridization between Bread Wheat (Triticum aestivum L.) and Its Wild Relatives in Europe

^a Instituto de Ecología, Universidad Nacional Autónoma de México (UNAM), A.P. 70-725, 04510 México D.F., México
^b ENSA, UMR-DGPC, 2 place Viala, 34060 Montpellier, France

^* Corresponding author (zaharieva{at}ecologia.unam.mx)

In Europe, wild wheat relatives of the Triticum–Aegilops complex grow in sympatry with cultivated bread wheat (Triticum aestivum L.) and spontaneous hybridization is known to occur. With the development of transgenic wheat, an understanding of the likelihood and occurrence of hybridization and introgression between wheat and its relatives is needed for use in risk assessment. To assess the probability of wheat to wild relative gene introgression, the distribution and biology of wheat wild relatives and their genome affinity and crossability with bread wheat were reviewed. Twelve of the 22 known Aegilops species, as well as one wild Triticum species, T. monococcum L. subsp. aegilopoides (Link) Thell., are known to occur in Europe near or within wheat cultivation. Five tetraploid species, Ae. cylindrica Host., Ae. triuncialis L., Ae. geniculata Roth., Ae. neglecta Req. ex Berthol., and Ae. biuncialis Vis., have wide distribution in most European countries. Bread wheat, wild Aegilops species, and Triticum species are predominantly autogamous (except Ae. speltoides Tausch, typically allogamous), but outcrossing among species is possible depending on species sympatry, concurrent flowering, and sexual compatibility. Spontaneous hybridization with wheat was reported for most of the tetraploid Aegilops species. The probability of gene transfer and gene retention in hybrid progenies is, however, higher when a gene is located on a shared genome, particularly on the D genome shared with Ae. cylindrica and Ae. ventricosa Tausch. Case-by-case and region-by-region assessments are needed to evaluate the risk associated with production and competitiveness of hybrids and their progeny.

Abbreviations: GISH, genomic in situ hybridization • GM, genetically modified • RFLP, restriction fragment length polymorphism • SSR, simple sequence repeat

This article has been cited by other articles:

				T. Tesso, I. Kapran, C. Grenier, A. Snow, P. Sweeney, J. Pedersen, D. Marx, G. Bothma, and G. Ejeta The Potential for Crop-to-Wild Gene Flow in Sorghum in Ethiopia and Niger: A Geographic Survey Crop Sci., July 1, 2008; 48(4): 1425 - 1431. [Abstract] [Full Text] [PDF]