Testing a QTL index for marker selection of water-soluble carbohydrate content in perennial ryegrass

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dc.contributor.author Farrell, Markku S.
dc.contributor.author Turner, Lesley B.
dc.contributor.author Cairns, Andrew J.
dc.contributor.author Humphreys, Mervyn O.
dc.contributor.editor Huyghe, Christian
dc.date.accessioned 2011-06-07T10:18:50Z
dc.date.available 2011-06-07T10:18:50Z
dc.date.issued 2010-06-10
dc.identifier.citation Farrell , M S , Turner , L B , Cairns , A J & Humphreys , M O 2010 , ' Testing a QTL index for marker selection of water-soluble carbohydrate content in perennial ryegrass ' . in C Huyghe (ed.) , Sustainable use of Genetic Diversity in Forage and Turf Breeding . Springer Netherlands , pp. 465-469 . , 10.1007/978-90-481-8706-5_69 en
dc.identifier.isbn 9789048187058
dc.identifier.other PURE: 165821
dc.identifier.other dspace: 2160/6989
dc.identifier.uri http://hdl.handle.net/2160/6989
dc.description Turner, L.B., Cairns, A.J., Farrell, M., Humphreys, M.O. (2010). Testing a QTL index for marker selection of water-soluble carbohydrate content in perennial ryegrass. Sustainable use of Genetic Diversity in Forage and Turf Breeding, Huyghe, C. (Ed.) Chapter 69, (Part 5), 465-469. ISBN:9789048187058 en
dc.description.abstract Water-soluble carbohydrate provides an easily fermentable energy source in perennial ryegrass fodder. Previously the considerable genetic variation available within the species has been characterised by quantitative trait locus mapping and regions of the genome with significant control over trait expression validated by individual test crosses. However, only limited extents of the large variation available within the source population were recovered. Here a quantitative trait locus marker index has been devised to test the potential of this strategy to exploit the available variation more efficiently. Parents for polycrossing were chosen on the basis of an index weighted for the size of leaf water-soluble carbohydrate effects. Populations of one hundred plants from the crosses were maintained in a glasshouse and the water-soluble carbohydrate content of tiller bases and leaves was measured. The fructan and total water-soluble carbohydrate content of the high populations were always greater than in the low populations. However the differences were not always significant and were generally lower than for the parental populations. This highlights the confounding effects of genome-wide, uncontrolled, segregation for carbohydrate content outside marker-selection regions and the challenges ahead for marker selection of polygenic, complex traits in outbreeding species. en
dc.format.extent 5 en
dc.language.iso eng
dc.publisher Springer Netherlands
dc.relation.ispartof Sustainable use of Genetic Diversity in Forage and Turf Breeding en
dc.title Testing a QTL index for marker selection of water-soluble carbohydrate content in perennial ryegrass en
dc.type Text en
dc.type.publicationtype Book chapter en
dc.identifier.doi http://dx.doi.org/10.1007/978-90-481-8706-5_69
dc.contributor.institution Institute of Biological, Environmental and Rural Sciences en


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