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Please use this identifier to cite or link to this item: http://hdl.handle.net/11019/1524

Title: Quantitative trait loci associated with different polar metabolites in perennial ryegrass - providing scope for breeding towards increasing certain polar metabolites
Authors: Foito, Alexandre
Hackett, Christine A
Stewart, Derek
Velmurugan, Janaki
Milbourne, Dan
Byrne, Stephen L
Barth, Susanne
Keywords: Perennial ryegrass,
Lolium perenne
Polar metabolites,
Soluble carbohydrates
Citric acid and 2, 3-hydroxypropanoic acid
Issue Date: 10-Oct-2017
Publisher: Biomed Central
Citation: Alexandre Foito, Christine Anne Hackett, Derek Stewart, Janaki Velmurugan, Dan Milbourne, Stephen L. Byrne and Susanne Barth. Quantitative trait loci associated with different polar metabolites in perennial ryegrass - providing scope for breeding towards increasing certain polar metabolites. BMC Genetics. 2017 Oct 10;18(1):8. DOI 10.1186/s12863-017-0552-0
Series/Report no.: BMC Genetics;
Abstract: Background Recent advances in the mapping of biochemical traits have been reported in Lolium perenne. Although the mapped traits, including individual sugars and fatty acids, contribute greatly towards ruminant productivity, organic acids and amino acids have been largely understudied despite their influence on the ruminal microbiome. Results In this study, we used a targeted gas-chromatography mass spectrometry (GC-MS) approach to profile the levels of 25 polar metabolites from different classes (sugars, amino acids, phenolic acids, organic acids and other nitrogen-containing compounds) present in a L. perenne F2 population consisting of 325 individuals. A quantitative trait (QTL) mapping approach was applied and successfully identified QTLs regulating seven of those polar metabolites (L-serine, L-leucine, glucose, fructose, myo-inositol, citric acid and 2, 3-hydroxypropanoic acid).Two QTL mapping approaches were carried out using SNP markers on about half of the population only and an imputation approach using SNP and DArT markers on the entire population. The imputation approach confirmed the four QTLs found in the SNP-only analysis and identified a further seven QTLs. Conclusions These results highlight the potential of utilising molecular assisted breeding in perennial ryegrass to modulate a range of biochemical quality traits with downstream effects in livestock productivity and ruminal digestion.
Description: peer-reviewed
This study was financed through a Research Stimulus Fund Grant by the Irish Department of Agriculture, Fisheries and Marine (RSF 06–346). AF, CH and DS acknowledge support from The Scottish Government’s Rural and Environment Science and Analytical Services Division.
URI: http://hdl.handle.net/11019/1524
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Teagasc publications in Biomed Central

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