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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 (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).
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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 |