Abstract
To facilitate the use of wheat wild relatives in conventional breeding programs, a wheat pre-breeding activity started at ICARDA in 1994/1995 season. Preliminary results of gene introgression from wild diploid progenitors, Triticum urartu, T. baeoticum , Aegilops speltoides and Ae. tauschii and tetraploid T. dicoccoides are described. Crosses with wild diploid Triticum spp. yielded high variation in plant and spike morphology. Synthetic hexaploids were produced from crosses of a local durum wheat landrace ‘Haurani’ with two Ae. tauschii accessions. Both Ae. tauschii accessions carry hybrid necrosis alleles that gave necrotic plant phenotypes in crosses with some bread wheats. Backcross progenies with agronomical desirable traits, i.e. high spike productivity, short plant stature, earliness, drought tolerance and high productive tillering, were identified in crosses of durum wheat with wild Triticum spp. and in a cross of one of the hexaploid synthetics with a locally adapted bread wheat cv. ‘Cham 6’. Resistance to yellow rust was found in durum wheat crosses with the three wild Triticum spp. and Ae. speltoides and leaf rust resistance was identified in crosses with T. baeoticum and Ae. speltoides The results show that wheat immediate progenitors may be a valuable and readily accessible source of new genetic diversity for wheat improvement.
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Valkoun, J. (2001). Wheat Pre-Breeding Using Wild Progenitors. In: Bedö, Z., Láng, L. (eds) Wheat in a Global Environment. Developments in Plant Breeding, vol 9. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-3674-9_94
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DOI: https://doi.org/10.1007/978-94-017-3674-9_94
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