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dc.contributor.authorPott, Delphine
dc.contributor.authorVallarino, José G
dc.contributor.authorMedina, Juan Jesús
dc.contributor.authorFernie, Alisdair R
dc.contributor.authorAmaya, Iraida
dc.contributor.authorOsorio, Sonia
dc.date.accessioned2016-07-01T06:39:31Z
dc.date.available2016-07-01T06:39:31Z
dc.date.created2016
dc.date.issued2016-07-01
dc.identifier.urihttp://hdl.handle.net/10630/11720
dc.description.abstractThe cultivated strawberry (Fragaria x ananassa) is the berry fruit most consumed worldwide and is well-known for its delicate flavour and nutritional properties. However, fruit quality attributes have been lost or reduced after years of traditional breeding focusing mainly on agronomical traits. To face the obstacles encountered in the improvement of cultivated crops, new technological tools, such as genomics and high throughput metabolomics, are becoming essential for the identification of genetic factors responsible of organoleptic and nutritive traits. Integration of “omics” data will allow a better understanding of the molecular and genetic mechanisms underlying the accumulation of metabolites involved in the flavour and nutritional value of the fruit. To identify genetic components affecting/controlling? fruit metabolic composition, here we present a quantitative trait loci (QTL) analysis using a 95 F1 segregating population derived from genotypes ‘1392’, selected for its superior flavour, and ‘232’ selected based in high yield (Zorrilla-Fontanesi et al., 2011; Zorrilla-Fontanesi et al., 2012). Metabolite profiling was performed on red stage strawberry fruits using gas chromatography hyphenated to time-of-flight mass spectrometry, which is a rapid and highly sensitive approach, allowing a good coverage of the central pathways of primary metabolism. Around 50 primary metabolites, including sugars, sugars derivatives, amino and organic acids, were detected and quantified after analysis in each individual of the population. QTL mapping was performed on the ‘232’ x ‘1392’ population separately over two successive years, based on the integrated linkage map (Sánchez-Sevilla et al., 2015). First, significant associations between metabolite content and molecular markers were identified by the non-parametric test of Kruskal-Wallis. Then, interval mapping (IM), as well as the multiple QTL method (MQM) allowed the identification of QTLs in octoploid strawberry. A permutation test established LOD thresholds for each metabolite and year. A total of 132 QTLs were detected in all the linkage groups over the two years for 42 metabolites out of 50. Among them, 4 (9.8%) QTLs for sugars, 9 (25%) for acids and 7 (12.7%) for amino acids were stable and detected in the two successive years. We are now studying the QTLs regions in order to find candidate genes to explain differences in metabolite content in the different individuals of the population, and we expect to identify associations between genes and metabolites which will help us to understand their role in quality traits of strawberry fruit.es_ES
dc.description.sponsorshipUniversidad de Málaga. Campus de Excelencia Internacional Andalucía Tech. The work was supported by the MINECO (grant AGL2012-40066-C02-02 ; Spain). SO aknowledges the support by Spanish Ministry of Science and Innovation (Ramón and Cajal contract, RYC2011-09170). DP has received a predoctoral grant from MINECO (grant BES-2013-062856). JJM and IA has been supported by the grant AGL2012-40066-C02-01). The authors also aknowlegde the support by the University de Málaga, Campus de Excelencia Internacional de Andalucía.es_ES
dc.language.isoenges_ES
dc.rightsinfo:eu-repo/semantics/openAccesses_ES
dc.subjectFresases_ES
dc.subjectMetabolitoses_ES
dc.subject.otherMappinges_ES
dc.subject.otherFruites_ES
dc.subject.otherStrawberryes_ES
dc.subject.otherQTLes_ES
dc.subject.otherMetaboliteses_ES
dc.titleQTLs mapping for primary metabolites responsible of the organoleptic and nutritional characteristics of strawberry (Fragaria x ananassa)es_ES
dc.typeinfo:eu-repo/semantics/conferenceObjectes_ES
dc.centroFacultad de Cienciases_ES
dc.relation.eventtitleXIII REUNIÓN DE BIOLOGÍA MOLECULAR DE PLANTASes_ES
dc.relation.eventplaceOviedoes_ES
dc.relation.eventdate22 Junio 2016es_ES
dc.cclicenseby-nc-ndes_ES


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