| Gene Symbold |
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Class
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Level 1
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Reaction to Puccinia triticina
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Level 2
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Genes for resistance
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Level 3
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Level 4
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Symbol
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Wild Type
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Lr18
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Allele
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Symbol comment
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Derived from T. timopheevii. Independently derived lines with Lr18 possess a unique N band terminally located in chromosome 5BL {1614}. Low seedling responses conferred by Lr18 are most effective at 15-18C. With increasing temperatures the response becomes less effective and ineffective at 25-27C {935,see also,1614}.
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Chromosomes
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5BL {935} = T5BS.5BL-5G#1L{389}
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Germplasms
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i:Africa 43/7*Thatcher{318}, i:Red Egyptian PI 170925/6*Thatcher{318}, v:Africa 43{318}, v:Red Egyptian PI 170925{318}, v:Red Egyptian PI 17016-2c{318}, v:Sabikei 12{935}, v:Timvera{935}, v:Timvera Derivative{935}, v:Certain WYR accessions{935}, v:FTF{1614}, v:Several Sabikei lines including Sabikei 12{1614}, v2:Ck9803 Lr11{10595}, v2:FFR 524 Lr11{10595}, v2:Jamestown Lr11{10830}, v2:Pioneer 2684 Lr11{10595}, v2:SS520 Lr11{10595}
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Comment
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A resistance gene, LrTt2, in line 842-2 was located on chromosome 5BL in a similar region to Lr18. The claim that Lr18 and LrTt2 were different based on low seedling infection types, but the genetic background were different {10752}.
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