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Solanum candolleanum

Common Name(s) Achachil ch’ogue, Monte ch’ogue
Code cnd
Synonyms S. abancayense, S. abbottianum, S. achacachense,  S. amabile,  S, amayanum,  S. ambosinum,  S. ancoripae,  S. antacochense,  S. aymaraesense, S. bill-hookeri, S. bukasovii, S. calcense, S. canasense, S. catarthrum, S. chillonanum, S. coelestipetalum, S. hapalosum, S. huancavelicae, S. lechnoviczii, S. lobbianum, S. longiusculum, S. marinasense, S. mollepujroense, S. multidissectum, S. neohawkesii, S. ochoae, S. orophilum, S. ortegae, S. pampasense, S. puchupuchense, S. pumilum, S. punoense, S. sarasarae, S. sawyeri, S. saxatile, S. sicuanum, S. soukupii, S. sparsipilum, S. tapojense, S. tarapatanum, S. tenellum, S. velardei
Clade 4
Series Tuberosa
Ploidy Diploid (2x), Triploid (3x)
EBN 2
Self-compatible No
Cytoplasm Type M, P (Hosaka 2014)

Description

Solanum candolleanum distribution Map note

Solanum candolleanum (candolleanum, in honor of Swiss botanist Agustin Pyramus de Candolle) is primarily a Bolivian species, but also found in Peru.  Plants large, as much as three feet tall, although this is quite a variable species.  Stolons reach almost five feet.  Large tubers, maybe the largest of any of the wild potatoes, reaching up to about five inches long or more under cultivation.  Flowers blue to purple.  Berries round to ovoid and similar in size to domesticated potato.  Grows in cool, moist environments up to about the 13,100 foot elevation.

This species can survive frosts down to 24 degrees F (-4.5 C) (Li 1977, as S. canasense).  Vega (1995) found that this species is more frost tolerant than domesticated potato.

Condition Level of Resistance Source
Scab Somewhat resistant Machida-Hirano 2015 (as S. bukasovii)
Potato Leaf Roll Virus Somewhat resistant Machida-Hirano 2015 (as S. bukasovii)
Aphids Somewhat resistant Machida-Hirano 2015
Potato Cyst Nematode Somewhat resistant Machida-Hirano 2015 (as S. bukasovii)
Root Knot Nematode Somewhat resistant Machida-Hirano 2015
Frost Somewhat resistant Machida-Hirano 2015
Wart Somewhat resistant Machida-Hirano 2015
Potato Virus Y Somewhat resistant Chung 2011, Machida-Hirano 2015
Potato Virus Y, C Strain Resistant Takacs 1999 (as S. achacachense)
Colorado Potato Beetle Somewhat resistant Machida-Hirano 2015
Drought Somewhat resistant Machida-Hirano 2015

Glykoalkaloid content

Johns (1990) found glycoalkaloid levels ranging from mostly from 25 to 78mg/100g in four accessions of S. candolleanum (as S. bukasovii and S. canasense).  They also noted an outlier at 9mg/100g (PI 473492).  Some have levels are just above the safety limit for S. tuberosum at 20mg/100g and those are probably safe to eat in small amounts.  Some varieties may even be as safe as S. tuberosum if the 9mg/100g outlier is any indication.  The primary glycoalkaloids found were solanine and chaconine.  Van Gelder (1988) found TGA levels ranging from 70 to 92 mg / 100 g (as S. bukasovii), 32 to 36 mg / 100 g (as S. canasense), and 36 mg / 100 g (as S. multidissectum).

Images

 
       
       

Cultivation

The USDA potato genebank has observed that some accessions of this species are dependent upon GA3 for germination (Bamberg 1999).  Bamberg (2018) found that alternating temperatures increased germination in this species.

Breeding

Crosses with S. tuberosum

Female Male Berry Set Seed Set Germination Ploidy Source
S. tuberosum S. candolleanum (including many synonyms) Low Minimal     Jackson (1999)
S. candolleanum (inlcuding many synonyms) S. tuberosum Minimal Minimal     Jackson (1999)
             

Crosses with other species

Jackson (1999) found 3-12% 2n pollen for varieties of this species.

Female Male Berry Set Seed Set Germination Ploidy Source
S. candolleanum S. brevicaule Moderate Moderate     Ochoa 1990
S. candolleanum S. boliviense Moderate Moderate     Ochoa 1990
S. candolleanum S. infundibuliforme Moderate Moderate     Ochoa 1990
S. candolleanum S. berthaultii (as S. litusinum) Moderate Moderate     Ochoa 1990
S. candolleanum S. raphanifolium High High     Ochoa 1990
S. candolleanum S. acaule High High     Ochoa 1990
S. candolleanum S. microdontum Yes? No     Ochoa 1990
S. boliviense (as S. megistacrolobum) S. candolleanum Yes? No     Ochoa 1990
S. candolleanum S. stipuloideum (as S. circaefolium) No? No     Ochoa 1990
S. candolleanum S. lignicaule No? No     Ochoa 1990

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