Genetic analysis of the slow melting flesh character in peach
Serra, Octávio (Centre de Recerca en Agrigenòmica)
Giné Bordonaba, Jordi (Institut de Recerca i Tecnologia Agroalimentàries)
Eduardo, Iban (Centre de Recerca en Agrigenòmica)
Bonany, Joan (Institut de Recerca i Tecnologia Agroalimentàries)
Echeverria, Gemma (Institut de Recerca i Tecnologia Agroalimentàries)
Larrigaudière, Christian (Institut de Recerca i Tecnologia Agroalimentàries)
Arús i Gorina, Pere (Centre de Recerca en Agrigenòmica)

Data:	2017
Resum:	The slow-melting flesh (SMF) trait in peach [Prunus persica (L. ) Batsch] defines a slower process of postharvest fruit-softening than the prevalent melting flesh (MF) types. This gives a longer shelf life and a delayed harvest-time resulting in better fruit quality. Unlike other known fruit texture traits, SMF is difficult to measure and has a complex inheritance. We examined this character over 2 years in the offspring of two crosses, both with "Big Top," an SMF nectarine, as the female parent, and with a melting flesh (MF) nectarine as the male parent ("Armking" and "Nectaross"). Following harvest, a texturometer was used to provide a textural profile analysis, and fruit firmness evolution was measured with a penetrometer over a period of 5 days' storage at 20 °C. Linkage maps were constructed with a high-density SNP chip, and a phenotype-genotype analysis allowed the detection of three independent genomic regions where most QTLs (quantitative trait loci) were located. Two of these, on linkage groups 4 and 5, explained the variability for two characters-maturity date and firmness loss-that is, the QTL on linkage group 4 found in the MF parents and that on linkage group 5 in Big Top. A third region on linkage group 6, which identified a QTL for maturity date only in Armking, has no apparent association to the softening process. The relationship between maturity date and fruit-firmness loss and a hypothesis on the inheritance of the SMF character are discussed.
Ajuts:	Ministerio de Economía y Competitividad AGL2015-68329-R Ministerio de Economía y Competitividad SEV-2015-0533 European Commission 265582
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Llengua:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Matèria:	Prunus persica ; Postharvest behavior ; Marker-assisted selection ; Maturity date ; Fruit flesh texture
Publicat a:	Tree Genetics & Genomes, Vol. 13, issue 4 (Aug. 2017) , art. 77, ISSN 1614-2942

DOI: 10.1007/s11295-017-1160-x

Post-print 34 p, 3.2 MB

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