Abstract
The availability of genetic linkage maps enables the detection and analysis of QTLs contributing to quality traits of the genotype. Proton Transfer Reaction Mass Spectrometry (PTR-MS), a relatively novel spectrometric technique, has been applied to measure the headspace composition of the Volatile Organic Compounds (VOCs) emitted by apple fruit genotypes of the progeny ‘Fiesta’ × ‘Discovery’. Fruit samples were characterised by their PTR-MS spectra normalised to total area. QTL analysis for all PTR-MS peaks was carried out and 10 genomic regions associated with the peaks at m/z = 28, 43, 57, 61, 103, 115 and 145 were identified (LOD > 2.5). We show that it is possible to find quantitative trait loci (QTLs) related to PTR-MS characterisation of the headspace composition of single whole apple fruits indicating the presence of a link between molecular characterisation and PTR-MS data. We provide tentative information on the metabolites related to the detected QTLs based on available chemical information. A relation between apple skin colour and peaks related to carbonyl compounds was established.
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Abbreviations
- ANOVA::
-
analysis of variance
- bp::
-
base pairs
- IM::
-
Interval Mapping
- KW::
-
Kruskal Wallis
- LG::
-
linkage group
- LOD::
-
Logarithm of the odds
- m/z::
-
mass charge ratio
- ppbv::
-
part per billion by volume
- PTR-MS::
-
Proton Transfer Reaction- Mass Spectrometry
- QTLs::
-
Quantitative Trait Loci
- RAPD::
-
Random Amplified Polymorphism DNA
- SSR::
-
Simple Sequence Repeats
- VOCs::
-
Volatile Organic Compounds
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Zini, E., Biasioli, F., Gasperi, F. et al. QTL mapping of volatile compounds in ripe apples detected by proton transfer reaction-mass spectrometry. Euphytica 145, 269–279 (2005). https://doi.org/10.1007/s10681-005-1645-9
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DOI: https://doi.org/10.1007/s10681-005-1645-9