GrainGenes Reference Report: TAG-108-1401
Reference
TAG-108-1401
Title
High-resolution genetic mapping of the leaf stripe resistance gene Rdg2a in barley
Journal
Theoretical and Applied Genetics
Year
2004
Volume
108
Pages
1401-1408
Author
Bulgarelli D
[ Show all 8 ]
Abstract
Summary: The dominant gene Rdg2a of barley conferring resistance to the hemi-biotrophic seed-borne pathogen Pyrenophora graminea is located in the distal region of chromosome arm 1 (7H)S. As the first step towards isolating the gene, a high-resolution genetic map of the region was constructed using an F2 population of 1,400 plants (ThibautRdg2a x Mirco). The map included six classes of resistance gene analogues (RGAs) tightly associated with Rdg2a. Rdg2a was delimited to a genetic interval of 0.14 cM between the RGAs ssCH4 and MWG851. Additional markers were generated using the sequence from the corresponding region on rice chromosome 6, allowing delimitation of the Rdg2a syntenic interval in rice to a 115 kbp stretch of sequence. Analysis of the rice sequence failed to reveal any genes with similarity to characterized resistance genes. Therefore, either the rice-barley synteny is disrupted in this region, or Rdg2a encodes a novel type of resistance protein
External Databases
Pubmed: 14689188
Keyword
barley
[ Show all 36 ]
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GrainGenes Reference Report: TAG-108-1401
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GrainGenes is a product of the Agricultural Research Service of the US Department of Agriculture. | |||