Euphytica (2002) 127, 377-382

M. Aghaee-Sarbarzeh, M. Ferrahi, S. Singh, H. Singh, B. Friebe, B.S. Gill and H.S. Dhaliwal (2002)
Ph^I-induced transfer of leaf and stripe rust-resistance genes from Aegilops triuncialis and Ae. geniculata to bread wheat
Euphytica 127 (3), 377-382
Abstract: Leaf and stripe rusts are severe foliar diseases of bread wheat. Recently, chromosomes 5M^g from the related species Aegilops geniculata that confers resistance to both leaf and stripe rust and 5U^t from Ae. triuncialis conferring resistance to leaf rust have been transferred to bread wheat in the form of disomic DS5M^g(5D) and DS5U^t(5A) chromosome substitution lines. The objective of this study was to shorten the alien segments in these lines using PhI-mediated, induced homoeologous recombination. Putative recombinants were evaluated for their rust resistance, and by genomic in situ hybridization and microsatellite analyses. One agronomically useful wheat-Ae. geniculata recombinant resistant to leaf and stripe rust was identified that had only a small terminal segment of the 5M^gL arm transferred to the long arm of an unidentified wheat chromosome. This germplasm can be used directly in breeding programs. Only one leaf rust-resistant wheat- Ae. triuncialis recombinant, which consists of most of the complete 5U^t chromosome with a small terminal segment derived from 5AS, was identified. This germplasm will need further chromosome engineering before it can be used in wheat improvement.
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Link to article at publishers website
Database assignments for author(s): Bikram S. Gill

Research topic(s) for pests/diseases/weeds:
resistance/tolerance/defence of host

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Puccinia striiformis	Wheat (Triticum)
	Puccinia triticina	Wheat (Triticum)