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Solanum stenophyllidium
| Common Names | |
| Code | sph |
| Synonyms | S. brachistotrichum, S. jamesii, S. nayaritense |
| Clade | 1 |
| Series | Pinnatisecta |
| Ploidy | Diploid (2x) |
| EBN | 1 |
| Tuberization Photoperiod | Unknown |
| Self-compatibility | No |
| Nuclear Genome | B |
| Cytoplasmic Genome | Unknown |
| Citation | Bitter: Repert. Spec. Nov. Regni Veg. 12: 51. 1913. |
Description
Solanum stenophyllidium (stenophyllidium meaning narrow leaves) is a Mexican species, ranging from central Mexico north almost to the US border. Highly variable in size and form. Plants range about 9 to 27 inches tall. Long, thin leaves, similar to many of the Mexican dryland species.
This species can survive frosts down to 26 degrees F (-3.5 C) (Li 1977). Vega (1995) found that this species (as S. brachyostrichum) is less frost tolerant than domesticated potato.
| Condition | Type | Level of Resistance | Source |
|---|---|---|---|
| Alternaria solani (Early Blight) | Fungus | Somewhat resistant | Jansky 2008 |
| Frost | Abiotic | Somewhat resistant | Machida-Hirano 2015 (as S. brachistotrichum) |
| Globodera pallida (Pale Cyst Nematode) | Invertebrate | Not resistant | Bachmann-Pfabe 2019 |
| Meloidogyne chitwoodi (Columbia Root Knot Nematode) | Invertebrate | Somewhat resistant | Graebner 2018b |
| Phytophthora infestans (Late Blight) | Fungus | Somewhat resistant | Bachmann-Pfabe 2019 |
| Potato Virus Y (PVY) | Virus | Not resistant | Cai 2011 |
| Pectobacterium carotovorum (Blackleg/Soft Rot) | Bacteria | Not resistant | Chung 2011 |
Glykoalkaloid content
Images
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Cultivation
Bamberg (2017) found a 56% increase in seed set in this species with supplemental applications of liquid fertilizer at four and seven weeks after potting.
Towill (1983) found that seeds of this species stored at 1 to 3 degrees C germinated at 40% after 8 years.
Trapero-Mozos (2018) determined that this species will tolerate a temperature of 40 C even without prior acclimatization to warm temperatures.
Breeding
Crosses with S. tuberosum
| Female | Male | Berry Set | Seed Set | Ploidy | Germ | Source |
|---|---|---|---|---|---|---|
| S. tuberosum | S. stenophyllidium (as S. brachistotrichum) | None | None | Jackson (1999) | ||
| S. stenophyllidium (as S. brachistotrichum) | S. tuberosum | None | None | Jackson (1999) |
Crosses with other species
Watanabe (1991) found that 25% (although only 2 plants) of varieties of this species (as S. brachistotrichum) produced 2n pollen and Jackson (1999) found 7-13%, which would be effectively tetraploid and 2EBN.
| Female | Male | Berry Set | Seed Set | Ploidy | Germ | Source |
|---|---|---|---|---|---|---|