Philosophiae Doctor - PhD (Biotechnology)

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A transcriptome analysis of apple (Malus x domestica Borkh.) cv ‘golden delicious’ fruit during fruit growth and development
(2013) Chikwambi, Zedias; Rees, D.J.G.; Christoffels, Alan
The growth and development of apple (Malus x domestica Borkh.) fruit occurs over a period of about 150 days after anthesis to full ripeness. During this period morphological and physiological changes occur defining fruit quality. These changes are a result of spatial and temporal patterns of gene expression during fruit development as regulated by environmental, genetic and environmental-by-genetic factors. A number of previous studies partially characterised the transcriptomes of apple leaf, fruit pulp, whole fruit, and peel plus pulp tissues, using cDNA micro arrays and other PCR based technologies. These studies, however, remain limited in throughput and specificity for transcripts of low abundance. Hence, the aim of this project was to apply a high throughput technique to characterise the full mRNA transcriptome of the ‘Golden Delicious’ fruit peels and pulp tissues in order to understand the molecular mechanisms underlying the morphophysiological changes that occur during fruit development.