The Apple Physiology and Culture program at Cornell has developed over the past 20 years an integrated crop physiology approach with field experimentation and dynamic crop modeling that has substantially improved the understanding of the complex behavior of apple orchards in the variable environment. Outputs from the model are providing critical real-time quantitative information helping growers optimize their orchard management, especially control of the yield, for better profitability.
Selectable marker genes are widely used for the efficient transformation of crop plants. In most cases, selection is based on genes for antibiotic or herbicide resistance, which are most efficient. Due mainly to consumer and grower concerns, considerable effort has been put into developing strategies to eliminate marker genes from plants after transformation. However, these methods are generally of low efficiency.