land Article The Spatial-Temporal Dynamics of Potato Agrobiodiversity in the Highlands of Central Peru: A Case Study of Smallholder Management across Farming Landscapes Alejandra Arce 1,* , Stef de Haan 2,3 , Henry Juarez 2, Dharani Dhar Burra 3, Franklin Plasencia 2, Raul Ccanto 4, Severin Polreich 2 and Maria Scurrah 4 1 Department of Agricultural Sciences, University of Antioquia, Medellín 1226, Colombia 2 International Potato Center (CIP), La Molina 1558, Lima 12, Peru;
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[email protected] (S.P.) 3 Agricultural Genetics Institute, International Center for Tropical Agriculture (CIAT), Bac Tu Liem District, Hanoi 100803, Vietnam;
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[email protected]; Tel.: +51-978-472-425 Received: 28 September 2019; Accepted: 30 October 2019; Published: 8 November 2019 Abstract: In the high Andes, environmental and socio-economic drivers are transforming agriculture and presumably affecting the in situ conservation of potato (Solanum spp.). To monitor the use and conservation of intraspecific diversity, systematic and comparative studies across agricultural land-use systems are needed. We investigated the spatial-temporal dynamics of potato in two landscapes of Peru’s central Andes: A highland plateau (Huancavelica) compared to an eastern slope (Pasco). We examined household-level areal allocations, altitudinal distribution, sectoral fallowing practices, and the conservation status for three main cultivar groups: (i) Bred varieties, (ii) floury landraces, and (iii) bitter landraces. Mixed methods were used to survey 323 households and the 1101 potato fields they managed in 2012–2013.