Crop genetic erosion: understanding and responding to loss of crop diversity

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dc.creatorKhoury, Colin K.
dc.creatorBrush, S.
dc.creatorCostich, Denise E.
dc.creatorCurry, H.A.
dc.creatorHaan, Stef de
dc.creatorEngels, Johannes M.M.
dc.creatorGuarino, Luigi
dc.creatorHoban, Sean
dc.creatorMercer, K.L.
dc.creatorMiller, A.J.
dc.creatorNabhan, Gary Paul
dc.creatorPerales, H.R.
dc.creatorRichards, C.
dc.creatorRiggins, C.
dc.creatorThormann, I.
dc.date2022-01
dc.date2021-10-01T04:55:52Z
dc.date2021-10-01T04:55:52Z
dc.date.accessioned2026-06-27T17:57:07Z
dc.descriptionCrop diversity underpins the productivity, resilience, and adaptive capacity of agriculture. Loss of this diversity, termed crop genetic erosion, is therefore concerning. While alarms regarding evident declines in crop diversity have been raised for over a century, the magnitude, trajectory, drivers, and significance of these losses remain insufficiently understood. We outline the various definitions, measurements, scales, and sources of information on crop genetic erosion. We then provide a synthesis of evidence regarding changes in the diversity of traditional crop landraces on farms, modern crop cultivars in agriculture, crop wild relatives in their natural habitats, and crop genetic resources held in conservation repositories. This evidence indicates that marked losses, but also maintenance and increases in diversity, have occurred in all these contexts, the extent depending on species, taxonomic and geographic scale, and region, as well as analytical approach. We discuss steps needed to further advance knowledge around the agricultural and societal significance, as well as conservation implications, of crop genetic erosion. Finally, we propose actions to mitigate, stem, and reverse further losses of crop diversity.
dc.identifierhttps://hdl.handle.net/10568/115281
dc.identifier.urihttp://hdl.handle.net/123456789/150387
dc.languageen
dc.publisherWiley
dc.rightsOpen Access
dc.sourceKhoury, C. K., Brush, S., Costich, D. E., Curry, H. A., de Haan, S., Engels, J. M. M., Guarino, L., Hoban, S., Mercer, K. L., Miller, A. J., Nabhan, G. P., Perales, H. R., Richards, C., Riggins, C., & Thormann, I. (2021). Crop genetic erosion: understanding and responding to loss of crop diversity. New Phytologist. ISSN 1469-8137.
dc.subjectagrobiodiversity
dc.subjectbiodiversity conservation
dc.subjectcrops
dc.subjectcrop wild relatives
dc.subjectfood security
dc.subjectplant genetic resources
dc.subjectphysiology
dc.titleCrop genetic erosion: understanding and responding to loss of crop diversity
dc.typeJournal Article

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