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GrainGenes Reference Report: PBR-123-93

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Reference	PBR-123-93
Title	Identification of microsatellite markers for a leaf rust resistance gene introgressed into common wheat from Triticum timopheevii
Journal	Plant Breeding
Year	2004
Volume	123
Pages	93-95
Author	Leonova I [ Show all 7 ]
Abstract	Summary: The tetraploid wheat Triticum timopheevii Zhuk (AtAtGG) is known as a source of genes determining resistance to many diseases. An introgressive line 842, with durable resistance to leaf rust was established by crossing T. aestivum cv. 'Saratovskaya29' with T. timopheevii ssp. viticulosum and used for mapping leaf rust resistance genes. Molecular analysis of the line 842 with polymorphic microsatellite markers detected introgressions of T. timopheevii into the homoeologous group 2 chromosomes of common wheat. Translocation breakpoints of introgressed fragments were localized between the markers Xgwm95 and Xgwm817 on chromosome 2A, as well as Xgwm1128 and Xgwm1067 on chromosome 2B. Linkage analysis demonstrated the association of disease resistance at the seedling stage with chromosome 2A. The gene was found to be linked with marker Xgwm817 at a genetic distance of 1.5 cM. The alien leaf rust resistance gene was temporarily designated as lrTt1
Keyword	[ Hide all but 1 of 27 ] chromosomal location chromosome chromosome localization common wheat conferring resistance distance fragments gene introgression introgressive lines leaf rust leaf rust resistance linkage linkage analysis mapping microsatellite molecular analysis powdery mildew puccinia recondita resistance rust rust resistance rust resistance gene tetraploid wheat translocation triticum triticum timopheevii

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