Genetic diversity

Concern has been expressed that urbanization, the replacement of traditional agricultural systems by modern industrial methods and the introduction of modern high-yielding varieties together are putting pressure on genetic diversity. At the IPK genebank materials from several repeat collection expeditions to certain geographical regions are available; these allow for an evaluation of the flux in genetic diversity over a 40 to 50 year period. Whereas quantitative changes are typically small a qualitative allelic flow is generally detectable.