A Arner J of Potato Res (1999) 76:103-119 103 Wild Potato Collecting Expedition in Southern Peru (Departments of Apurimac, Arequipa, Cusco, Moquegua Puno, Tacna) in 1998: Taxonomy and New Genetic Resources David M. Spooner*\ Alberto Salas L6pez2,Z6simo Huaman2, and Robert J. Hijmans2 'United States Department of Agriculture, Agricultural Research Service, Department of Horticulture, University of Wisconsin, 1575 Linden Drive, Madison, WI, 53706-1590. Tel: 608-262-0159; FAX: 608-262-4743; email:
[email protected]) 'International Potato Center (CIP), Apartado 1558, La Molina, Lima 12, Peru. ABSTRACT INTRODUCTION Peruhas 103 taxa of wild potatoes (species, sub- Wild and cultivated tuber-bearing potatoes (Solanum species, varieties, and forms) according to Hawkes sect. Petota) are distributed from the southwestern United (1990; modified by us by a reduction of species in the States to south-central Chile. The latest comprehensive tax- Solanum brevicaule complex) and including taxa onomic treatment of potatoes (Hawkes, 1990) recogllized 216 described by C. Ochoa since 1989. Sixty-nine of these tuber-bearing species, with 101 taxa (here to include species, 103 taxa (67%) were unavailable from any ofthe world's subspecies, varieties and forms) from Peru. Ochoa (1989, genebanks and 85 of them (83%) had less than three 1992b, 1994a,b) described ten additional Peruvian taxa rais- germplasm accessions. We conducted a collaborative ing the total to 111. We lower this number to 103 with a mod- Peru(INIA), United States (NRSP-6), and International ification of species in the Solanum brevicaule complex. Potato Center (CIP) wild potato (Solanum sect. Petota) Sixty-nine of these 103 species (67%) were unavailable from collecting expedition in Peru to collect germplasm and any ofthe world's genebanks and 85 of them (83%) had less gather taxonomic data.