A combination of leaf rust resistance gene Lr34 and lesion mimic gene lm significantly enhances adult plant resistance to Puccinia triticina in wheat

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dc.contributor.author Li, Tao
dc.contributor.author Bai, Guihua
dc.contributor.author Gu, ShiLiang
dc.date.accessioned 2012-07-24T15:39:53Z
dc.date.available 2012-07-24T15:39:53Z
dc.date.issued 2012-07-24
dc.identifier.uri http://hdl.handle.net/2097/14074
dc.description.abstract Leaf rust caused by Puccinia triticina is an economically-important disease in wheat worldwide. A combination of different types of resistance genes may significantly enhance rust resistance under rust-favorable conditions. To investigate the interactions between the rust resistance gene Lr34 and the lesion mimic gene lm on 1BL in Ning 7840, a segregating F8-10 population of 180 recombinant inbred lines was developed from Ning 7840/Chokwang and evaluated for both lesion mimic expression and leaf rust response at the adult plant stage in a greenhouse. A major quantitative trait locus (QTL), derived from Sumai 3, was co-localized with Lr34 on chromosome 7D and explained 41.5% of phenotypic variations for rust severity and 22.1% for leaf tip necrosis (LTN). The presence of Lr34 was confirmed by Lr34-specific markers cssfr1 and cssfr2 in Ning 7840 and Sumai 3. Unlike Lr34, lm conditioned a spontaneous lesion mimic phenotype and had a significant effect on reducing uredinial size, and a smaller effect on severity. Additive effects were observed between lm and Lr34 for severity and LTN, and an epistatic effect was observed for infection type. Single marker analysis also identified several other QTL with minor effects on severity, infection type, or LTN. en_US
dc.relation.uri http://www.springerlink.com/content/26684j566717824n en_US
dc.rights This article is published with open access at Springerlink.com en_US
dc.subject Triticum aestivum en_US
dc.subject Puccinia triticina en_US
dc.subject Lesion mimic en_US
dc.subject Slow rusting gene Lr34 en_US
dc.subject Leaf rust resistance en_US
dc.title A combination of leaf rust resistance gene Lr34 and lesion mimic gene lm significantly enhances adult plant resistance to Puccinia triticina in wheat en_US
dc.type Article (publisher version) en_US
dc.date.published 2012 en_US
dc.citation.doi doi:10.1007/s11434-012-5001-x en_US
dc.citation.epage 2119 en_US
dc.citation.issue 17 en_US
dc.citation.jtitle Chinese Science Bulletin en_US
dc.citation.spage 2113 en_US
dc.citation.volume 57 en_US
dc.contributor.authoreid gbai en_US

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