| Gene Symbold |
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Class
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Level 1
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Reaction to Puccinia striiformis Westend.
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Level 2
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Designated genes for resistance to stripe rust
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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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Yr18
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Allele
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Chromosomes
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7D{1362}, 7DS{324}
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Germplasms
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i:AVS+Yr18{970}, i:Thatcher(Yr7) near-isogenic lines with Lr34 including the 13 2-gene combinations reported in{434,937}, v:Jupateco 73R, v:Lerma Rojo 64{1375}, v:Libellula{11139}, v:Nacazari 76{1375}, v:Strampelli {11139}, v:Tesia F 79{1375}, v:Tonichi S 81{1375}, v:Wheaton{1375}, v2:Parula Yr29{10281}, v2:Penjamo 62 Yr6 (heterogeneous){1375}, v2:Saar Yr29{10481}, v2:Wheats with Lr34 (See Lr34), v2:Others{1376}, v2:Kauz and derivatives, Bakhtawar 94, WH542, Memof, Bascribey 95, Seyhan 95 Yr9 Yr27{10160}, ma:Complete linkage with Lr34{937,1362}, ma:Ltn{1361}, ma:and Bdv1{1363}, ma:Xgwm120-7D - 0.9 cM - Yr18 - 0.7 cM - Xgwm295-7D{10259}, c:See Lr34, c:Putative ABC transporter{10862}
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Comment
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This gene is identical to Lr34, Pm38 and Ltn and confers stem rust resistance in some genetic backgrounds. Some AVS NILs also have Yr18. Forty-three Chinese land varieties predicted to have Yr18 based on markers had high rust severities. Genetic analyses of four of these landrace (Sichuanyonggang 2, Baikemai, Youmai and Zhangsihuang) indicated the presence of an independent suppressor {11101}. Libellula had an additional 4 QTL and Strampelli had an additional 3 QTL {11139}
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