Mapping and expression of genes associated with raspberry fruit ripening and softening

Publication Overview
TitleMapping and expression of genes associated with raspberry fruit ripening and softening
AuthorsSimpson CG, Cullen DW, Hackett CA, Smith K, Hallett PD, McNicol J, Woodhead M, Graham J
TypeJournal Article
Journal NameTheoretical and Applied Genetics
Volume130
Issue3
Year2017
Page(s)557-572
CitationSimpson CG, Cullen DW, Hackett CA, Smith K, Hallett PD, McNicol J, Woodhead M, Graham J. Mapping and expression of genes associated with raspberry fruit ripening and softening. Theoretical and Applied Genetics. 2017; 130(3):557-572.

Abstract

Fruit softening is an important agronomical trait that involves a complex interaction of plant cell processes. We have used both qualitative and quantitative scoring of fruit firmness, length, mass, and resistance to applied force to identify QTL in a raspberry mapping population. QTLs were located primarily on linkage group (LG) 3 with other significant loci on LG 1 and LG 5 and showed mostly additive effects between the two parents. The expression of key genes that underlie these QTLs with roles in cell-wall solubility, water uptake, polyamine synthesis, transcription, and cell respiration was tested across five stages of fruit development, from immature green to red ripe fruit, using real-time RT-qPCR. Gene expression patterns showed variable expression patterns across fruit development with a highly significant positive and negative correlation between genes, supporting precise regulation of expression of different cell processes throughout raspberry fruit development. Variable timing in expression was also found in some genes at different fruit development stages between soft and firm cultivars. Multiple processes have a role to play in fruit softening and this will require development of multiple marker combinations to genes that characterise raspberry fruit softening.
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Raspberry-ripening_and_softening_genes-Graham-2017
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URLhttps://link.springer.com/article/10.1007/s00122-016-2835-7