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Identification and expression of the gene Yr2 for resistance to Puccinia striiformis in the wheat differential cultivars Heines Kolben, Heines Peko and Heines VII
Author(s) -
CALONNEC A.,
JOHNSON R.,
De VALLAVIEILLEPOPE C.
Publication year - 1997
Publication title -
plant pathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.928
H-Index - 85
eISSN - 1365-3059
pISSN - 0032-0862
DOI - 10.1046/j.1365-3059.1997.d01-22.x
Subject(s) - puccinia striiformis , biology , cultivar , gene , virulence , rust (programming language) , stripe rust , botany , plant disease resistance , genetics , computer science , programming language
Genetic data showed that a common gene was present in the three differential wheat cultivars Heines VII ( Yr2 ), Heines Peko ( Yr2, Yr6 ) and Heines Kolben ( Yr6 ) expressed against the race 109E9 of Puccinia striiformis which possesses virulence for Yr6 and avirulence for Yr2 . This supported the hypothesis that Heines Kolben carries the gene Yr2 in addition to Yr6 for resistance to yellow rust in a genetic background in which Yr2 is weakly expressed in seedlings. F1, F2 and F3 progenies from the cross Heines Kolben × Peragis confirmed the monogenic segregation of Yr2 in Heines Kolben and demonstrated the variation of its expression with environmental conditions.