@inbook {3342, title = {Evolution of hierarchical variation patterns under domestication and their taxonomic treatment}, booktitle = {Infraspecific classification of wild and cultivated plants}, year = {1986}, pages = {191-201}, publisher = {Clarendon Press}, organization = {Clarendon Press}, address = {Oxford}, keywords = {CLASSIFICATION, CULTIVATED PLANTS, DOMESTICATION, EVOLUTION, INFRASPECIFIC CLASSIFICATION}, author = {Pickersgill, B.}, editor = {Styles, B. T.} }