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Purchase seeds or tubers of Solanum chomatophilum

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Description

S. chomatophilum is found from southern Ecuador south through most of Peru.  It is one of the most widely distributed and variable wild species in Peru.  Its natural habitat is slopes, thickets, woods, and ravines at 8,200 to 13,500 feet (2500 to 4100 m) (Correll 1962).

The specific epithet, chomatophilum, means something like “tending to be grooved,” or, I suppose, “groovy.”  We could call it the groovy nightshade.  The name is formed from the Greek words “choma,” for “groove,” and “philein,” for “to love.”  While there is no completely standardized pronunciation for scientific names, the most common way to pronounce this species is probably so-LAY-num koh-mah-TOH-fil-um.

Plants 1 to 3 feet tall.  Various forms, some rosette-like, others erect.  Very long stolons, from three to almost five feet, sometimes becoming woody.  Tubers whitish, very small, less than an inch in diameter and moniliform (like beads on a string).  Flowers purple to violet.  Berries long and narrow.

Resistances

Hijmans (2003) found that at least some accessions of this species were frost resistant down to 23 degrees F (-5 C).

Condition	Type	Level of Resistance	Source
Alternaria solani (Early Blight)	Fungus	Somewhat resistant	Jansky 2008
Frost	Abiotic	Resistant	Machida-Hirano (2015)
Globodera pallida (Pale Cyst Nematode)	Invertebrate	Not resistant	Castelli 2003
Globodera rostochiensis (Potato Cyst/Golden Nematode)	Invertebrate	Resistant	Castelli 2003
Leptinotarsa decemlineata (Colorado Potato Beetle)	Invertebrate	Resistant	Pelletier (2007)
Macrosiphum euphorbiae (Potato Aphid)	Invertebrate	Not resistant to Resistant	Pompon 2011
Myzus persicae (Green Peach Aphid)	Invertebrate	Somewhat resistant	Pompon (2010), Machida-Hirano (2015)
Pectobacterium carotovorum (Blackleg/Soft Rot)	Bacteria	Somewhat resistant	Chung 2011
Phytophthora infestans (Late Blight)	Fungus	Not resistant	Gonzales 2002
Phytophthora infestans (Late Blight)	Fungus	Some resistance	Karki 2020
Potato Virus Y (PVY)	Virus	Not resistant	Cai 2011

Glykoalkaloid content

Images

Cultivation

Chen (1976) found that this species reaches its maximum frost resistance (about 17 degrees F, -8.3 C) following a three week period of shortening photoperiod and reducing day and night temperatures.

Towill (1983) found that seeds of different accessions of this species stored at 1 to 3 degrees C germinated at 36% after 14 years, 50% after 17 years, and 58% after 20 years.

Breeding

Crosses with S. tuberosum

Watanabe (1991) found that 4.3% of varieties of this species produced 2n pollen, which would be effectively tetraploid and probably 4EBN.

Female	Male	Berry Set	Seed Set	Germ	Ploidy	Source
S. chomatophilum	S. tuberosum 2x	High	Low			Ochoa (2004)
S. chomatophilum	S. tuberosum 2x	Yes	No			Villamon 2005
S. chomatophilum	S. tuberosum 4x	None	None			Jackson (1999)
S. tuberosum 2x	S. chomatophilum	Moderate	Low			Ochoa (2004)
S. tuberosum 2x	S. chomatophilum	Yes	No			Villamon 2005
S. tuberosum 4x	S. chomatophilum	Low	Minimal			Jackson (1999)

Crosses with other species

Jackson (1999) found 3-11% 2n pollen for varieties of this species.

Female	Male	Berry Set	Seed Set	Germ	Ploidy	Source
S. acaule	S. chomatophilum	High	High			Ochoa (2004)
S. albicans	S. chomatophilum	Moderate	Low			Ochoa (2004)
S. candolleanum (as S. bukasovii)	S. chomatophilum	Moderate	Moderate			Ochoa (2004)
S. cantense	S. chomatophilum	None	None			Ochoa (2004)
S. chiquidenum	S. chomatophilum	Moderate	Low			Ochoa (2004)
S. chomatophilum	S. acaule	High	Moderate			Ochoa (2004)
S. chomatophilum	S. albicans	High	Low			Ochoa (2004)
S. chomatophilum	S. x blanco-galdosii	Low	High			Ochoa (2004)
S. chomatophilum	S. boliviense (as S. megistacrolobum)	High	Moderate			Ochoa (2004)
S. chomatophilum	S. candolleanum (as S. bukasovii)	High	Moderate			Ochoa (2004)
S. chomatophilum	S. cantense	Low	Moderate			Ochoa (2004)
S. chomatophilum	S. chiquidenum	Moderate	Low			Ochoa (2004)
S. chomatophilum	S. colombianum (as S. jaenense)	Low	Low			Ochoa (2004)
S. chomatophilum	S. contumazaense	Low	None			Ochoa (2004)
S. chomatophilum	S. dolichocremastrum	Moderate	High			Ochoa (2004)
S. chomatophilum	S. huancabambense	None	None			Ochoa (2004)
S. chomatophilum	S. humectophilum	Moderate	High			Ochoa (2004)
S. chomatophilum	S. hypacrarthrum	Moderate	None			Ochoa (2004)
S. chomatophilum	S. immite	Moderate	High			Ochoa (2004)
S. chomatophilum	S. laxissimum	Moderate	High			Ochoa (2004)
S. chomatophilum	S. lignicaule	Moderate	Moderate			Ochoa (2004)
S. chomatophilum	S. limbaniense	Low	High			Ochoa (2004)
S. chomatophilum	S. mochiquense	High	High			Ochoa (2004)
S. chomatophilum	S. multiinterruptum	High	Moderate			Ochoa (2004)
S. chomatophilum	S. paucissectum	Low	Low			Ochoa (2004)
S. chomatophilum	S. peloquinianum	Moderate	Moderate			Ochoa (2004)
S. chomatophilum	S. piurae	Moderate	Moderate			Ochoa (2004)
S. chomatophilum	S. raphanifolium	Moderate	None			Ochoa (2004)
S. chomatophilum	S. raquialatum	Moderate	Moderate			Ochoa (2004)
S. chomatophilum	S. rhomboideilanceolatum	Moderate	Moderate			Ochoa (2004)
S. chomatophilum	S. simplicissimum	High	None			Ochoa (2004)
S. chomatophilum	S. sogarandinum	Moderate	Moderate			Ochoa (2004)
S. chomatophilum	S. wittmackii	None	None			Ochoa (2004)
S. colombianum (as S. jaenense)	S. chomatophilum	Moderate	None			Ochoa (2004)
S. contumazaense	S. chomatophilum	None	None			Ochoa (2004)
S. dolichocremastrum	S. chomatophilum	Low	None			Ochoa (2004)
S. huancabambense	S. chomatophilum	High	High			Ochoa (2004)
S. humectophilum	S. chomatophilum	Moderate	Moderate			Ochoa (2004)
S. hypacrarthrum	S. chomatophilum	None	None			Ochoa (2004)
S. immite	S. chomatophilum	Moderate	None			Ochoa (2004)
S. laxissimum	S. chomatophilum	Low	None			Ochoa (2004)
S. lignicaule	S. chomatophilum	Low	None			Ochoa (2004)
S. limbaniense	S. chomatophilum	Moderate	None			Ochoa (2004)
S. mochiquense	S. chomatophilum	None	None			Ochoa (2004)
S. multiinterruptum	S. chomatophilum	High	None			Ochoa (2004)
S. paucissectum	S. chomatophilum	High	Moderate			Ochoa (2004)
S. peloquinianum	S. chomatophilum	Moderate	Moderate			Ochoa (2004)
S. piurae	S. chomatophilum	Moderate	Moderate			Ochoa (2004)
S. raphanifolium	S. chomatophilum	Low	None			Ochoa (2004)
S. raquialatum	S. chomatophilum	Moderate	Moderate			Ochoa (2004)
S. rhomboideilanceolatum	S. chomatophilum	High	Moderate			Ochoa (2004)
S. simplicissimum	S. chomatophilum	Moderate	None			Ochoa (2004)
S. sogarandinum	S. chomatophilum	Low	None			Ochoa (2004)
S. wittmackii	S. chomatophilum	Low	None			Ochoa (2004)

References

Solanum chomatophilum at Solanaceae Source

Solanum chomatophilum at GRIN Taxonomy

Solanum chomatophilum at CIP