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GrainGenes Reference Report: TAG-126-1167

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Reference
TAG-126-1167
Title
Development and characterization of a compensating wheat-Thinopyrum intermedium Robertsonian translocation with Sr44 resistance to stem rust (Ug99).
Journal
Theoretical and Applied Genetics
Year
2013
Volume
126
Pages
1167-1177
Author
Liu W
[ Show all 7 ]
Abstract
The emergence of the highly virulent Ug99 race complex of the stem rust fungus (Puccinia graminis Pers. f. sp. tritici Eriks. and Henn.) threatens wheat (Triticumaestivum L.) production worldwide. One of the effective genes against the Ug99 race complex is Sr44, which was derived from Thinopyrum intermedium (Host) Barkworth and D.R. Dewey and mapped to the short arm of 7J (designated 7J1S) present in the noncompensating T7DS-7J1L∙7J1S translocation. Noncompensating wheat-alien translocations are known to cause genomic duplications and deficiencies leading to poor agronomic performance, precluding their direct use in wheat improvement. The present study was initiated to produce compensating wheat-Th. intermedium Robertsonian translocations with Sr44 resistance. One compensating RobT was identified consisting of the wheat 7DL arm translocated to the Th. intermedium 7J1S arm resulting in T7DL∙7J1S. The T7DL∙7J1S stock was designated as TA5657. The 7DL∙7J1S stock carries Sr44 and has resistance to the Ug99 race complex. This compensating RobT with Sr44 resistance may be useful in wheat improvement. In addition, we identified an unnamed stem rust resistance gene located on the 7J1L arm that confers resistance not only to Ug99, but also to race TRTTF, which is virulent to Sr44. However, the action of the second gene can be modified by the presence of suppressors in the recipient wheat cultivars.
External Databases
PubMed: 23358862
Gene
Sr44 (Triticum)
Locus
Sr44
Probe
BE404728
BE473884
Summarized in
ReferenceMAS Wheat. Bringing Genomics to the Wheat Fields. Disease Resistance. Stem Rust Resistance. Sr44 MAS Wheat. Marker Assisted Selection in Wheat.