Difference in wild forms and their respective domesticated forms showing the impact of natural selection during evolution and domestication on phenotypic traits. (a) Evolution of maize; the domesticated maize (up) and wild teosinte (down). Teosinte has many lateral branches, while today’s maize is unbranched. (b) Evolution of tomato; the much larger fruit (right) is from the domesticated Solanum lycopersicum, and the small tomato fruit (right) is from wild species Solanum pimpinellifolium; and (c) evolution of cotton (Gossypium hirsutum); the long fiber phenotype is from domesticated cotton G. hirsutum (AD1) (left) and small fuzzy phenotype is from the wild species (right).
