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center of origin
The center of origin (or centre of origin) is a geographical area where a group of organisms, either domesticated or wild, first developed its distinctive properties.〔ITPGRFA, Article 2〕 Centers of origin are also considered centers of diversity.
==Plants==
Locating the origin of crop plants is basic to plant breeding. This allows one to locate wild relatives, related species, and new genes (especially dominant genes, which may provide resistance to diseases).
Knowledge of the origins of crop plants is important in order to avoid genetic erosion, the loss of germplasm due to the loss of ecotypes and landraces, loss of habitat (such as rainforests), and increased urbanization. Germplasm preservation is accomplished through gene banks (largely seed collections but now frozen stem sections) and preservation of natural habitats (especially in centers of origin).
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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