48 apple trees from a segregating F1 population from a cross of 'Ottawa 3' x 'Robusta 5'. Malus domestica

48 apple trees from a segregating F1 population from a cross of 'Ottawa 3' x 'Robusta 5' were analyzed by microarray to identify gene expression differences between the individuals to correlate gene expression patterns with phenotypic traits segregating in the population Overall design: 48 individual apple trees were assayed once each using RNA isolated from a single shoot tip from each tree. There were no biological or technical replicates in the experiment. There was no control sample, since all 48 were compared to each other.