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Geographical Parameters and Proximity to Related Species Predict Genetic Variation in the Inbred Potato Species Solanum verrucosum Schlechtd

^a Dep. of Horticulture, Univ. of Wisconsin–Madison, 1575 Linden Dr., Madison, WI 53706
^b USDA-ARS, Vegetable Crops Research Unit, Inter-Regional Potato Introduction Station, 4312 Hwy. 42, Sturgeon Bay, WI 54235

View larger version (23K): [in a new window]   Fig. 1. Origin locations of S. verrucosum accessions studied and natural range of some other wild potato species growing nearby.

View larger version (20K): [in a new window]   Fig. 2. Principal component analysis clusters corresponding to physical location (see Table 1 for codes identifying accessions).

View larger version (15K): [in a new window]   Fig. 3. Plots of GR within North, South, and Southeast clusters versus (a) Latitude in degrees north of 19 and (b) distance to nearest S. demissum in kilometers.