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dc.contributor.author Markku S. en_US
dc.contributor.author Lesley B. en_US
dc.contributor.author Andrew J. en_US
dc.contributor.author Mervyn O. en_US
dc.contributor.editor Christian en_US
dc.date.accessioned 2011-06-07T10:18:50Z
dc.date.available 2011-06-07T10:18:50Z
dc.date.issued 2010-06-10 en_US
dc.identifier http://dx.doi.org/10.1007/978-90-481-8706-5_69 en_US
dc.identifier 9789048187058 en_US
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 Science+Business Media , pp. 465-469 . , 10.1007/978-90-481-8706-5_69 en_US
dc.identifier.other PURE: 165821 en_US
dc.identifier.other dspace: 2160/6989 en_US
dc.identifier.uri http://hdl.handle.net/2160/6989
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_US
dc.format.extent 5 en_US
dc.publisher Springer Science+Business Media en_US
dc.relation.ispartof Sustainable use of Genetic Diversity in Forage and Turf Breeding en_US
dc.title Testing a QTL index for marker selection of water-soluble carbohydrate content in perennial ryegrass en_US
dc.contributor.pbl Institute of Biological, Environmental and Rural Sciences en_US


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