|Common Name(s)||Alcco papa, Apharuma, Atoc papa, Charca, C’kita papa, Ckascke, Jamach’i ch’ogue, Jamppatu papa, Llutu arac, Llutu papa, Papa de Perdiz, Papa de Zorro, Piscco papa|
|Synonyms||S. alandiae, S. anomalocalyx, S. avilesii, S. boliviense subsp. virgultorum, S. brevimucronatum, S. candelarianum, S. famatinae, S. gourlayi, S. hondelmannii, S. hoopesii, S. incamayoense, S. lapazense, S. leptophyes, S. liriunianum, S. oplocense, S. pachytrichum, S. setulosistylum, S. sparsipilum, S. spegazzinii, S. subandigenum, S. sucrense, S. tuberosum subsp. sparsipilum, S. ugentii, S. vidaurrei, S. virgultorum|
|Ploidy||Diploid (2x), tetraploid (4x), hexaploid (6x)|
|Tuberization Photoperiod||Short day|
|Cytoplasm Type||W (Hosaka 2009)|
|Citation ||Bitter: Repert. Spec. Nov. Regni Veg. 11:390. 1912|
Solanum brevicaule (brevicaule, meaning short stemmed) is primarily distributed from southern Peru to central Bolivia. Plants reach about two feet tall, occasionally up to three feet. Stolons reach 3-4 feet long, perhaps as long as six feet in some cases (Ochoa 1990, as S. sparsipilum). Tubers round to ovate, one to two inches long, larger in cultivation. Flowers light blue to dark blue. Berries round to ovate, typically speckled. Found up to about the 13,000 foot elevation, but mostly lower. Often grows in dry environments and has good drought resistance.
Solanum brevicaule is a geographically and morphologically diverse species. Boundaries between it and its nearest relatives are uncertain. Twenty species, including diploids, tetraploids, and hexaploids, are often lumped together in a “Solanum brevicaule Complex.” Van den Berg (1998) and Alvarez (2008) performed comprehensive morphological studies of the species in the S. brevicaule Complex and found little basis for division into more than three species, but inconclusive evidence even for that. The future probably holds additional taxonomic consolidation of S. brevicaule and its closest relatives.
S. brevicaule is probably not safe to eat, other than in very small amounts and perhaps not even then. The lines that we have grown here and tasted have dry flesh and thick, chewy skin with a strong flavor characteristic of baking potatoes, but an intensely bitter aftertaste.
1650 seeds per gram.
This species can survive frosts down to 26 degrees F (-3.5 C) (Li 1977, as S. fendleri). Vega (1995) found that this species is more frost tolerant than domesticated potato. It has a dormancy period lasting several months.
|Condition||Type||Level of Resistance||Source|
|Aphids||Invertebrate||Resistant||Machida-Hirano 2015 (as S. palustre)|
|Aphids||Invertebrate||Not resistant to moderately resistant||Alvarez 2006 (as S. hondelmannii and S. spegazzinii)|
|Colorado Potato Beetle||Invertebrate||Somewhat resistant||Machida-Hirano 2015 (as S. gourlayi)|
|Frost||Abiotic||Somewhat resistant||Machida-Hirano 2015|
|Potato Cyst Nematode||Invertebrate||Somewhat resistant||Machida-Hirano 2015 (as S. gourlayi)|
|Potato Leafroll Virus||Virus||Somewhat resistant||Machida-Hirano 2015 (as S. gourlayi)|
|Potato Virus X||Virus||Resistant||Horvath 1989 (as S. alandiae)|
|Potato Virus X||Virus||Somewhat resistant||Machida-Hirano 2015 (as S. leptophyes)|
|Potato Virus Y||Virus||Resistant||Horvath 1989 (as S. alandiae)|
|Rhizoctonia solani||Fungus||Somewhat resistant||Ochoa 1990 (as S. leptophyes)|
|Root Knot Nematode||Invertebrate||Somewhat resistant||Machida-Hirano 2015 (as S. gourlayi)|
|Soft Rot / Blackleg||Bacterium||Somewhat resistant||Machida-Hirano 2015 (as S. leptophyes)|
|Tobacco Rattle Virus||Virus||Resistant||Horvath 1989 (as S. alandiae)|
|Wart||Fungus||Somewhat resistant||Machida-Hirano 2015 (as S. leptophyes)|
Johns (1990) found glykoalkaloid levels of 23mg/100g to 164mg/100g for eight accessions of S. brevicaule (some as S. sparsipilum). The primary glycoalkaloids were solanine and chaconine. Van Gelder (1988) found TGA levels ranging from 95 to 175 mg / 100 g for S. brevicaule, 113 to 163 as S. gourlayi, 71 to 135 mg / 100g as S. leptophyes, 40 to 60 mg / 100 g as S. oplocense, 17 to 220 as S. spegazzinii, and 77 to 156 as S. sucrense. Collapsing all the synonyms gives a total range of 17 to 220 mg / 100 g. This is is a large range, with some flirting with edibility but many clearly in the danger zone.
I have found seeds of this species easy to germinate using the standard conditions for S. tuberosum, although sometimes slow.
Due to the length of the stolons, most growers will want to contain the plants in some way. We grow wild potatoes with long stolons in buried fabric pots, which prevents them from getting out of control. A 5 gallon fabric pot works well for most wild potatoes.
The USDA potato genebank has observed that some accessions of this species are dependent upon GA3 for germination (Bamberg 1999).
Bamberg (2017) found a 86% increase in seed set in this species with supplemental applications of liquid fertilizer at four and seven weeks after potting.
Crosses with S. tuberosum
|Female||Male||Berry Set ||Seed Set||Germ||Ploidy||Source|
|S. brevicaule||S. tuberosum 2x||Moderate||Moderate||Ochoa 1990|
|S. brevicaule||S. tuberosum 4x||None||None||Jackson (1999)|
|S. tuberosum||S. brevicaule||Low||Minimal||Jackson (1999)|
Crosses with other species
Jackson (1999) found 4-12% 2n pollen in varieties of this species.
|Female||Male||Berry Set ||Seed Set||Germ||Ploidy||Source|
|S. acaule||S. brevicaule||High||High||Ochoa 1990|
|S. berthaultii (as S. tarijense)||S. brevicaule (as S. leptophyes)||Low||Low||Ochoa 1990|
|S. boliviense (as S. megistacrolobum)||S. brevicaule (as S. leptophyes)||Yes||No||Ochoa 1990|
|S. brevicaule (as S. alandiae)||S. acaule||Moderate||Moderate||Ochoa 1990|
|S. brevicaule (as S. alandiae)||S. berthaultii||High||High||Ochoa 1990|
|S. brevicaule (as S. alandiae)||S. boliviense||High||High||Ochoa 1990|
|S. brevicaule||S. candolleanum||High||High||Ochoa 1990|
|S. brevicaule (as S. alandiae)||S. chacoense||Yes||Yes||Ochoa 1990|
|S. brevicaule (as S. alandiae)||S. huancabambense||High||High||Ochoa 1990|
|S. brevicaule||S. infundibuliforme||Low||Low||Ochoa 1990|
|S. brevicaule (as S. alandiae)||S. microdontum||Low||Low||Ochoa 1990|
|S. brevicaule (as S. leptophyes)||S. neovavilovii||Moderate||Moderate||Ochoa 1990|
|S. brevicaule||S. raphanifolium||High||High||Ochoa 1990|
|S. brevicaule (as S. alandiae)||S. raquialatum||High||High||Ochoa 1990|
|S. infundibuliforme||S. brevicaule (as S. alandiae)||Low||Low||Ochoa 1990|
|S. microdontum||S. brevicaule (as S. alandiae)||Low||Low||Ochoa 1990|