RRC ID 18957
著者 Liu W, Jin Y, Rouse M, Friebe B, Gill B, Pumphrey MO.
タイトル Development and characterization of wheat-Ae. searsii Robertsonian translocations and a recombinant chromosome conferring resistance to stem rust.
ジャーナル Theor Appl Genet
Abstract The emergence of a new highly virulent race of stem rust (Puccinia graminis tritici), Ug99, rapid evolution of new Ug99 derivative races overcoming resistance of widely deployed genes, and spread towards important wheat growing areas now potentially threaten world food security. Exploiting novel genes effective against Ug99 from wild relatives of wheat is one of the most promising strategies for the protection of the wheat crop. A new source of resistance to Ug99 was identified in the short arm of the Aegilops searsii chromosome 3S(s) by screening wheat- Ae. searsii introgression libraries available as individual chromosome and chromosome arm additions to the wheat genome. For transferring this resistance gene into common wheat, we produced three double-monosomic chromosome populations (3A/3S(s), 3B/3S(s) and 3D/3S(s)) and then applied integrated stem rust screening, molecular maker analysis, and cytogenetic analysis to identify resistant wheat-Ae. searsii Robertsonian translocation. Three Robertsonian translocations (T3AL·3S(s)S, T3BL·3S(s)S and T3DL·3S(s)S) and one recombinant (T3DS-3S(s)S·3S(s)L) with stem rust resistance were identified and confirmed to be genetically compensating on the basis of genomic in situ hybridization, analysis of 3A, 3B, 3D and 3S(s)S-specific SSR/STS-PCR markers, and C-banding. In addition, nine SSR/STS-PCR markers of 3S(s)S-specific were developed for marker-assisted selection of the resistant gene. Efforts to reduce potential linkage drag associated with 3S(s)S of Ae. searsii are currently under way.
巻・号 122(8)
ページ 1537-45
公開日 2011-5-1
DOI 10.1007/s00122-011-1553-4
PMID 21347655
MeSH Basidiomycota* DNA Primers / genetics DNA, Recombinant / genetics* Genetic Therapy / methods Immunity, Innate / genetics* In Situ Hybridization / methods Microscopy, Fluorescence Minisatellite Repeats / genetics Plant Diseases / genetics Plant Diseases / microbiology* Plant Diseases / therapy* Translocation, Genetic / genetics* Triticum / genetics*
IF 4.439
引用数 49
WOS 分野 HORTICULTURE AGRONOMY PLANT SCIENCES GENETICS & HEREDITY
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