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GrainGenes Reference Report: EUP-159-385

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Reference	EUP-159-385
Title	Identification and genetic mapping of a powdery mildew resistance gene in wild emmer ( Triticum dicoccoides ) accession IW72 from Israel.
Journal	Euphytica
Year	2008
Volume	159
Pages	385-390
Author	[ Hide all but 1 of 8 ] Ji X Xie C Ni Z Yang T Nevo E Fahima T Liu Z Sun Q
Abstract	Powdery mildew, caused by Blumeria graminis f. sp. tritici (Bgt), is a devastating disease of wheat (Triticum aestivum) in China and worldwide, causing severe yield losses annually. Wild emmer (T. dicoccoides) accession IW72 collected from Israel is resistant to powdery mildew at the seedling and adult stages. Genetic analysis indicated that the resistance was controlled by a single dominant gene, temporarily designated MlIW72. The F2 population and F3 families derived from a hybrid between IW72 and susceptible durum wheat line Mo75 were used for molecular mapping of the resistance gene. MlIW72 was linked with SSR loci Xgwm344, Xcfa2040, Xcfa2240, Xcfa2257 and Xwmc525 on the long arm of chromosome 7A. In addition, two STS markers, MAG2185 (derived from RFLP marker PSR680) and MAG1759 (developed from EST CD452874), were mapped close to MlIW72. All these markers were physically located in the terminal bin 0.86-1.00 of 7AL. The chromosome location and genetic mapping results suggested that the powdery mildew resistance gene identified in wild emmer accession IW72 might be a new allele at the Pm1 locus or a new locus closely linked to Pm1.
External Databases	http://dx.doi.org/10.1007/s10681-007-9540-1
Gene	MlIW72
Germplasm	IW72
Locus	MlIW72 MAG2185
QTL	QPm.MlIW72-7A QTL1470_7A-Ji_et_al._2008
Trait Study	Powdery mildew, Mo75 x IW72, Ji2008

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