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Plant Sci

Title:		QTL validation and stability for volatile organic compounds (VOCs) in apple
Author(s):		Costa F; Cappellin L; Zini E; Patocchi A; Kellerhals M; Komjanc M; Gessler C; Biasioli F;
Address:		"Research and Innovation Centre, Foundation Edmund Mach, Via Mach 1, San Michele all'Adige (TN), Italy. fabrizio.costa@fmach.it"
Journal Title:		Plant Sci
Year:		2013
Volume:		20130607
Issue:
Page Number:		1 - 7
DOI:		10.1016/j.plantsci.2013.05.018
ISSN/ISBN:		1873-2259 (Electronic) 0168-9452 (Linking)
Abstract:		"The aroma trait in apple is a key factor for fruit quality strongly affecting the consumer appreciation, and its detection and analysis is often an extremely laborious and time consuming procedure. Molecular markers associated to this trait can to date represent a valuable selection tool to overcome these limitations. QTL mapping is the first step in the process of targeting valuable molecular markers to be employed in marker-assisted breeding programmes (MAB). However, a validation step is usually required before a newly identified molecular marker can be implemented in marker-assisted selection. In this work the position of a set of QTLs associated to volatile organic compounds (VOCs) was confirmed and validated in three different environments in Switzerland, namely Wadenswil, Conthey and Cadenazzo, where the progeny 'FiestaxDiscovery' was replicated. For both QTL identification and validation, the phenotypic data were represented by VOCs produced by mature apple fruit and assessed with a Proton Transfer Reaction-Mass Spectrometer (PTR-MS) instrument. The QTL-VOC combined analysis performed among these three locations validated the presence of important QTLs in three specific genomic regions, two located in the linkage group 2 and one in linkage group 15, respectively, for compounds related to esters (m/z 43, 61 and 131) and to the hormone ethylene (m/z 28). The QTL set presented here confirmed that in apple some compounds are highly genetically regulated and stable across environments"
Keywords:		*Chromosome Mapping Environment Ethylenes/*metabolism Genetic Linkage Malus/*genetics Phenotype Plant Growth Regulators/*metabolism Quantitative Trait Loci/*genetics Volatile Organic Compounds/chemistry/isolation & purification/*metabolism Apple fruit qua;
Notes:		"MedlineCosta, Fabrizio Cappellin, Luca Zini, Elena Patocchi, Andrea Kellerhals, Markus Komjanc, Matteo Gessler, Cesare Biasioli, Franco eng Ireland 2013/08/31 Plant Sci. 2013 Oct; 211:1-7. doi: 10.1016/j.plantsci.2013.05.018. Epub 2013 Jun 7"