Genetic dissection of aroma volatile compounds from the essential oil of peach fruit : QTL analysis and identification of candidate genes using dense SNP maps
Articolo
Data di Pubblicazione:
2013
Citazione:
Genetic dissection of aroma volatile compounds from the essential oil of peach fruit : QTL analysis and identification of candidate genes using dense SNP maps / I. Eduardo, G. Chietera, R. Pirona, I. Pacheco, M. Troggio, E. Banchi, D. Bassi, L. Rossini, A. Vecchietti, C. Pozzi. - In: TREE GENETICS & GENOMES. - ISSN 1614-2942. - 9:1(2013 Feb), pp. 189-204. [10.1007/s11295-012-0546-z]
Abstract:
Volatile organic compounds (VOCs) in plants are
involved in aroma and pest resistance. These compounds form
a complex mixture whose composition is specific to species
and often to varieties. Despite their importance as essential
factors that determine peach fruit quality, understanding of
molecular, genetic, and physiological mechanisms underlying
aroma formation is limited. The aim of this study was the
identification in peach of quantitative trait loci (QTLs) for fruit
VOCs to understand their genetic basis using an F1 population of 126 seedlings deriving from the cross between “Bolero” (B)
and “OroA” (O), two peach cultivars differing in their aroma
profile. Dense single nucleotide polymorphism (SNP) and
SSR maps covering the eight linkage groups of the peach
genome were constructed by genotyping with the International
Peach SNP Consortium peach SNP array v1, and data for 23
VOCs with high or unknown “odor activity value” were
obtained by gas chromatography–mass spectrometry analysis
of fruit essential oil in the years 2007 and 2008. A total of 72 QTLs were identified, most consistent in both years. QTLs
were identified for the 23VOCs studied, including three major
QTLs for nonanal, linalool, and for p-menth-1-en-9-al stable
in both years. Collocations between candidate genes and major
QTLs were identified taking advantage of the peach genome
sequence: genes encoding two putative terpene
synthases and one lipoxygenase (Lox) might be involved in
the biosynthesis of linalool and p-menth-1-en-9-al, and nonanal,
respectively. Implications for marker-assisted selection
and future research on the subject are discussed.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
Linalool; Nonanal; p-Menth-1-en-9-al; Peach; QTLs; VOCs
Elenco autori:
I. Eduardo, G. Chietera, R. Pirona, I. Pacheco, M. Troggio, E. Banchi, D. Bassi, L. Rossini, A. Vecchietti, C. Pozzi
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