This page is a draft, part of our ongoing wild potato project. I’ll probably be adding information to the species pages through 2020 at least, but I’m making them public since they may be useful even incomplete.

Solanum stenophyllidium

Synonyms: S. brachistotrichum, S. jamesii, S. nayaritense

Series: Stenophyllidia

EBN: 1

Ploidy: Diploid

Segregation: Disomic

Self-compatible: No

Cytoplasm Type: ?

Description

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	Level of Resistance	Source
Frost	Somewhat resistant	Machida-Hirano 2015 (as S. brachistotrichum)

Glykoalkaloid content

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.

Breeding

Crosses with S. tuberosum

Female	Male	Berry Set	Seed Set	Germination	Ploidy	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.