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GrainGenes Reference Report: BJL-82-503

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Reference	BJL-82-503
Title	Are neopolyploids a likely route for a transgene walk to the wild? The Aegilops ovata x Triticum turgidum durum case
Journal	Biological Journal of the Linnean Society
Year	2004
Volume	82
Pages	503-510
Author	David JL [ Show all 10 ]
Abstract	Spontaneous hybridization between durum wheat (Triticum turgidum durum) and Aegilops ovata is regularly observed in nature. The frequency of spontaneous amphiploidy in sympatric populations was estimated at 10-6 (direct in situ observations and germinated seed collected from A. ovata plants). In nursery conditions some genotype combinations gave frequencies that were much higher at 10-3. Genomic in situ hybridization revealed that fertile amphiploids had arisen through unreduced gametes, and that some of them carried wheat-A. ovata recombinant chromosomes. The frequency of production of unreduced gametes is probably genetically inherited. Amphiploids provide a route for gene flow, including that of transgenes, to the wild. Gene flow could potentially be minimized through the choice of wheat cultivars that produce a low frequency of unreduced gametes
Keyword	chromosome [ Show all 8 ]

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