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Solanum longiconicum
| Common Names | |
| Code | lgc |
| Synonyms | |
| Clade | 3+4 |
| Series | Conicibaccata |
| Ploidy | Tetraploid (4x) |
| EBN | Unknown |
| Tuberization Photoperiod | Unknown |
| Self-compatibility | Yes |
| Nuclear Genome | AP |
| Cytoplasmic Genome | M |
| Citation | Bitter: Repert. Spec. Nov. Regni Veg. 10: 534. 1912. |
Description
Solanum longiconicum is a cloud forest species, primarily concentrated in Costa Rica, extending into Panama. Along with S. woodsonii, this is the most southern of the North American wild potatoes. Plants ranging from about 6 inches to 6 feet tall. Flowers, white, blue, purple, or white with colored stripes. Berries long and severely pointed. Tubers small and whitish.
The specific epithet, longiconicum, means “long cone,” referring to the shape of the berries. It is formed from the Latin words “longus,” for “long,” and “conicum,” for “cone.” While there is no completely standardized pronunciation for scientific names, the most common way to pronounce this species is probably so-LAY-num lahn-jee-KON-ih-kum.
Seeds of S. longiconicum have a seed spot, which distinguishes this species from the similar S. agrimoniifolium, S. oxycarpum, and S. woodsonii, all of which lack a seed spot (Spooner 2001). On the other hand, analysis of AFLP markers of S. longiconicum and S. woodsonii indicated that these two species are probably synonymous (Jimenez 2008).
Resistances
| Condition | Type | Level of Resistance | Source |
|---|---|---|---|
| Phytophthora infestans (Late Blight) | Fungus | Some resistance | Perez 2019 |
| Potato Leafroll Virus (PLRV) |
Virus | Not resistant | Natti 1953 |
| Sclerotinia sclerotiorum (White Mold) | Fungus | Not resistant | Jansky 2006 |
Glykoalkaloid content
I have found no accounts of glycoalkaloid content for this species. Tubers vary from moderate bitterness to apparent palatability and I suspect that it would be possible to make edible selections of this species.
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Cultivation
I have found this species slow and difficult to germinate using the standard conditions for S. tuberosum.
Accessions Evaluated
The following accessions were examined to prepare this profile. I have evaluated 5/8 accessions currently available from the US potato genebank.
PI 208780
No germination.
PI 604088
An in-vitro accession from Cartago, Costa Rica. This was the first success that I had growing this species.
PI 604092
High germination and strong seedling growth.
PI 604093
Very low germination and weak seedling growth.
PI 604095
Very low germination and weak seedling growth.
Breeding
EBN has not been established for this species, but it will almost certainly be either 2EBN or 4EBN. There are AP polyploids with both EBN levels.
Crosses with S. tuberosum
| Female | Male | Berry Set | Seed Set | Germination | Ploidy | Source |
Crosses with other species
| Female | Male | Berry Set | Seed Set | Germination | Ploidy | Source |
References
Solanum longiconicum at Solanaceae Source