Introduction and overview -- The origins of agriculture, crop domestication, and centers of diversity -- Plant genetic resources, conservation, and politics : a history of international and national developments supporting the conservation and use of crop diversity -- Diversity and its evolution in crop populations -- Abiotic and biotic components of agricultural ecosystems -- Diversity in, and adaptation to, adverse environments on-farm -- Who are the managers of diversity? Characterizing the social, cultural, and economic environments -- Measuring the values of on-farm diversity -- Policy and genetic diversity on-farm -- Farm, community, and landscape : genetic diversity and selection pressures at different social, spatial, and temporal scales -- Strategies for collaboration and intervention -- Conclusions : traditional varieties and agricultural productivity -- Appendix A : software packages useful for analyzing molecular data -- Appendix B : geographic information systems and remote sensing resources available on the internet -- Appendix C : a selection of PPB champions through the ages.
This resource is supported by the Institute of Museum and Library Services under the provisions of the Library Services and Technology Act as administered by State Library of Iowa.