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The influence of agriculture on genetic biodiversity. R. C. l. Kirkwood, ed. pp.15-23.
| Ennos R.A. (1997).
| Agricultural practices have profoundly modified the genetic biodiversity of indigenous plant species, crop populations and crop pathogens in the agricultural landscape. The nature and extent of the changes in genetic biodiversity depend on the farming systems in question. Modification of genetic biodiversity increases in magniture as one moves from extensive grazing systems, which retain much natural genetic biodiversity, through short term leys to arable systems where genetic biodiversity in many crop populations is zero. Reductions in biodiversity of crops have led to the evolution of more aggressive, asexually reproducing pathogen populations which are more difficult to control than those from which they have been derived. Changes in management to encourage the retention of genetic diversity in indigenous plant populations and to reintroduce genetic diversity into arable crops may have multiple envrionmental benefits.
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