New approaches to potato variety identification

The identification of varieties of potatoes and other crops is important at all stages of production. Traditional approaches have used morphological c haracters, but modern crop production increasingly demands methods that are more rapid and discriminating. Three new approaches to variety identificat ion are described: (i) image analysis, (ii) gel electrophoresis of proteins , (iii) the use of DNA profiling (molecular markers). The advantages and di sadvantages of each approach are considered and possible future development s highlighted.