Molecular mapping of qualitative and quantitative loci for resistance to Leptosphaeria maculans causing blackleg disease in canola ( Brassica napus L.)
Identifieur interne : 000B61 ( Main/Exploration ); précédent : 000B60; suivant : 000B62Molecular mapping of qualitative and quantitative loci for resistance to Leptosphaeria maculans causing blackleg disease in canola ( Brassica napus L.)
Auteurs : Rosy Raman [Australie] ; Belinda Taylor [Australie] ; Steve Marcroft [Australie] ; Jiri Stiller [Australie] ; Paul Eckermann [Australie] ; Neil Coombes [Australie] ; Ata Rehman [Australie] ; Kurt Lindbeck [Australie] ; David Luckett [Australie] ; Neil Wratten [Australie] ; Jacqueline Batley [Australie] ; David Edwards [Australie] ; Xiaowu Wang [République populaire de Chine] ; Harsh Raman [Australie]Source :
- Theoretical and Applied Genetics [ 0040-5752 ] ; 2012.
Abstract
Abstract: Blackleg, caused by Leptosphaeria maculans, is one of the most important diseases of oilseed and vegetable crucifiers worldwide. The present study describes (1) the construction of a genetic linkage map, comprising 255 markers, based upon simple sequence repeats (SSR), sequence-related amplified polymorphism, sequence tagged sites, and EST-SSRs and (2) the localization of qualitative (race-specific) and quantitative (race non-specific) trait loci controlling blackleg resistance in a doubled-haploid population derived from the Australian canola (Brassica napus L.) cultivars Skipton and Ag-Spectrum using the whole-genome average interval mapping approach. Marker regression analyses revealed that at least 14 genomic regions with LOD ≥ 2.0 were associated with qualitative and quantitative blackleg resistance, explaining 4.6–88.9 % of genotypic variation. A major qualitative locus, designated RlmSkipton (Rlm4), was mapped on chromosome A7, within 0.8 cM of the SSR marker Xbrms075. Alignment of the molecular markers underlying this QTL region with the genome sequence data of B. rapa L. suggests that RlmSkipton is located approximately 80 kb from the Xbrms075 locus. Molecular marker-RlmSkipton linkage was further validated in an F2 population from Skipton/Ag-Spectrum. Our results show that SSR markers linked to consistent genomic regions are suitable for enrichment of favourable alleles for blackleg resistance in canola breeding programs.
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DOI: 10.1007/s00122-012-1842-6
Affiliations:
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type="eISSN">1432-2242</idno><imprint><publisher ref="https://scientific-publisher.data.istex.fr/ark:/67375/H02-SWLMH5L1-1">Springer-Verlag</publisher><pubPlace>Berlin/Heidelberg</pubPlace><date type="published" when="2012">2012</date><biblScope unit="vol" from="125" to="125">125</biblScope><biblScope unit="issue" from="2" to="2">2</biblScope><biblScope unit="page" from="405">405</biblScope><biblScope unit="page" to="418">418</biblScope></imprint><idno type="ISSN">0040-5752</idno></series></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0040-5752</idno></seriesStmt></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Abstract: Blackleg, caused by Leptosphaeria maculans, is one of the most important diseases of oilseed and vegetable crucifiers worldwide. The present study describes (1) the construction of a genetic linkage map, comprising 255 markers, based upon simple sequence repeats (SSR), sequence-related amplified polymorphism, sequence tagged sites, and EST-SSRs and (2) the localization of qualitative (race-specific) and quantitative (race non-specific) trait loci controlling blackleg resistance in a doubled-haploid population derived from the Australian canola (Brassica napus L.) cultivars Skipton and Ag-Spectrum using the whole-genome average interval mapping approach. Marker regression analyses revealed that at least 14 genomic regions with LOD ≥ 2.0 were associated with qualitative and quantitative blackleg resistance, explaining 4.6–88.9 % of genotypic variation. A major qualitative locus, designated RlmSkipton (Rlm4), was mapped on chromosome A7, within 0.8 cM of the SSR marker Xbrms075. Alignment of the molecular markers underlying this QTL region with the genome sequence data of B. rapa L. suggests that RlmSkipton is located approximately 80 kb from the Xbrms075 locus. Molecular marker-RlmSkipton linkage was further validated in an F2 population from Skipton/Ag-Spectrum. Our results show that SSR markers linked to consistent genomic regions are suitable for enrichment of favourable alleles for blackleg resistance in canola breeding programs.</div></front></TEI><affiliations><list><country><li>Australie</li><li>République populaire de Chine</li></country><settlement><li>Pékin</li></settlement></list><tree><country name="Australie"><noRegion><name sortKey="Raman, Rosy" sort="Raman, Rosy" uniqKey="Raman R" first="Rosy" last="Raman">Rosy Raman</name></noRegion><name sortKey="Batley, Jacqueline" sort="Batley, Jacqueline" uniqKey="Batley J" first="Jacqueline" last="Batley">Jacqueline Batley</name><name sortKey="Coombes, Neil" sort="Coombes, Neil" uniqKey="Coombes N" first="Neil" last="Coombes">Neil Coombes</name><name sortKey="Eckermann, Paul" sort="Eckermann, Paul" uniqKey="Eckermann P" first="Paul" last="Eckermann">Paul Eckermann</name><name sortKey="Edwards, David" sort="Edwards, David" uniqKey="Edwards D" first="David" last="Edwards">David Edwards</name><name sortKey="Lindbeck, Kurt" sort="Lindbeck, Kurt" uniqKey="Lindbeck K" first="Kurt" last="Lindbeck">Kurt Lindbeck</name><name sortKey="Luckett, David" sort="Luckett, David" uniqKey="Luckett D" first="David" last="Luckett">David Luckett</name><name sortKey="Marcroft, Steve" sort="Marcroft, Steve" uniqKey="Marcroft S" first="Steve" last="Marcroft">Steve Marcroft</name><name sortKey="Raman, Harsh" sort="Raman, Harsh" uniqKey="Raman H" first="Harsh" last="Raman">Harsh Raman</name><name sortKey="Raman, Harsh" sort="Raman, Harsh" uniqKey="Raman H" first="Harsh" last="Raman">Harsh Raman</name><name sortKey="Rehman, Ata" sort="Rehman, Ata" uniqKey="Rehman A" first="Ata" last="Rehman">Ata Rehman</name><name sortKey="Stiller, Jiri" sort="Stiller, Jiri" uniqKey="Stiller J" first="Jiri" last="Stiller">Jiri Stiller</name><name sortKey="Taylor, Belinda" sort="Taylor, Belinda" uniqKey="Taylor B" first="Belinda" last="Taylor">Belinda Taylor</name><name sortKey="Wratten, Neil" sort="Wratten, Neil" uniqKey="Wratten N" first="Neil" last="Wratten">Neil Wratten</name></country><country name="République populaire de Chine"><noRegion><name sortKey="Wang, Xiaowu" sort="Wang, Xiaowu" uniqKey="Wang X" first="Xiaowu" last="Wang">Xiaowu Wang</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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