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GrainGenes Reference Report: CRS-37-1928

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Reference	CRS-37-1928
Title	Mapping genes conferring and suppressing leaf rust resistance in wheat.
Journal	Crop Science
Year	1997
Volume	37
Pages	1928-1935
Author	Nelson JC Singh RP Autrique JE Sorrells ME
Abstract	Leaf rust, caused by Puccinia recondita Roberge ex Desmaz. f. sp. tritici Eriks. & E. Henn., is a serious disease of wheat (Triticum aestivum L.) worldwide. We evaluated leaf rust resistance in a RFLP-mapping population of wheat inbred lines developed from a synthetic (T. turgidum x T. tauschii) x T. aestivum cross, using inoculation trials performed on seedlings and adult plants. Map locations were assigned for seedling resistance genes Lr10 (chromosome arm 1AS), Lr23 (2BS), Lr27 (3BS), and Lr31 (4BL), and the adult-plant resistance gene Lr34 (7DS). The previously reported interaction between Lr27 and Lr31, requiring the presence of both genes for resistance to avirulent rust pathotypes, was confirmed. Lr23, effective in the durum parent ('Altar 84') of the synthetic, was suppressed in the synthetic and in one fourth of the inbred lines by a T. tauschii gene on homoeologous chromosome arm 2DS. This suppressor, designated as SuLr23, appears to be specific for Lr23 and may be orthologous to the gene. DNA markers are useful in refining the characterization of resistance genes and their interactions, toward the goal of constructing durably resistant cultivars via marker-controlled accumulation of specific genes.
External Databases	https://doi.org/10.2135/cropsci1997.0011183X003700060043x
Isolate	TBD/TM NCJ/BN BBB/BN TCB/TD
Trait Study	Leaf rust, Nelson97
Image	Lr genes on 2A, 2B and 2D Lr genes on 3B, 4B and 6D Lr genes on 7B and 7D Lr10 on 1A

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