An association mapping approach to identify flowering time genes in natural populations of Lolium perenne (L.)

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dc.contributor.author Skøt, Leif
dc.contributor.author Humphreys, Mervyn O.
dc.contributor.author Armstead, Ian P.
dc.contributor.author Heywood, Susan
dc.contributor.author Skøt, Kirsten P.
dc.contributor.author Sanderson, Ruth
dc.contributor.author Thomas, Ian D.
dc.contributor.author Chorlton, Ken H.
dc.contributor.author Sackville Hamilton, N. Ruaraidh
dc.date.accessioned 2008-12-15T08:54:15Z
dc.date.available 2008-12-15T08:54:15Z
dc.date.issued 2005-05-04
dc.identifier.citation Skøt , L , Humphreys , M O , Armstead , I P , Heywood , S , Skøt , K P , Sanderson , R , Thomas , I D , Chorlton , K H & Sackville Hamilton , N R 2005 , ' An association mapping approach to identify flowering time genes in natural populations of Lolium perenne (L.) ' Molecular Breeding , vol 15 , no. 3 , pp. 233-245 . , 10.1007/s11032-004-4824-9 en
dc.identifier.issn 1572-9788
dc.identifier.other PURE: 92912
dc.identifier.other dspace: 2160/1592
dc.identifier.uri http://hdl.handle.net/2160/1592
dc.identifier.uri http://www.springerlink.com/content/tn17983057651241/?p=a375a366289747f1b941cf2d7aa21c49&pi=0 en
dc.description Skøt, L., Humphreys, M. O., Armstead, I. P., Heywood, S., Skøt, K. P., Sanderson, R., Thomas, I. D., Chorlton, K. H., & Sackville Hamilton, N. R. (2005). An association mapping approach to identify flowering time genes in natural populations of Lolium perenne (L.). Molecular Breeding, 15(3), 233-245. Sponsorship: BBSRC RAE2008 en
dc.description.abstract We describe an association mapping approach using natural populations of perennial ryegrass (Lolium perenne L.) to identify molecular markers associated with heading date, an important trait affecting seasonal production, tillering, digestibility and grassland management regimes. Twenty-three natural populations originating from throughout Europe, with heading date phenotypes ranging from very early to very late, as well as three synthetic populations (varieties) were used for molecular marker genotyping using AFLP. In total, 589 polymorphic markers were identified. Hierarchical clustering, principal coordinate and other statistical analyses identified four outlying populations forming a clearly distinct sub-group. Removal of those four populations from the subsequent analysis reduced population sub-structure twofold. However, this made relatively little difference to the result of the association analysis. Linear regression identified three markers whose frequency of occurrence correlated with the heading date phenotype. Moreover, these markers were shown to be closely linked to each other within a major QTL on Chromosome 7, explaining 70% of the total variation in heading date. Pairwise linkage disequilibrium among them was also significant. These results suggest that association mapping approaches may be feasible in L. perenne, and that the use of natural populations could provide a useful source of genetic variation in traits of importance in crop improvement. en
dc.format.extent 13 en
dc.language.iso eng
dc.relation.ispartof Molecular Breeding en
dc.title An association mapping approach to identify flowering time genes in natural populations of Lolium perenne (L.) en
dc.type Text en
dc.type.publicationtype Article (Journal) en
dc.identifier.doi http://dx.doi.org/10.1007/s11032-004-4824-9
dc.contributor.institution Institute of Biological, Environmental and Rural Sciences en
dc.description.status Peer reviewed en


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