Fig. 6

Domestication results in a genetic bottleneck for genes under selection (right) as well as neutral genes that are not under selection (left). In this figure, the different shades of balls represent genetic diversity, with more significant loss of diversity occurring in genes under selection. This can be used to detect genes that have been involved in domestication, although it should be borne in mind that severe bottlenecks may greatly reduce variation in neutral genes as well and thereby make it difficult to determine which genes have been under selection. From Doebley et al. (2006), reproduced by permission of Elsevier and Dr. John Doebley