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 demissum

Synonyms:

Series:

EBN: 4

Ploidy: Hexaploid

Segregation:

Self-compatible:

Cytoplasm Type: D (Hosaka 2014)

Description

This species can survive frosts down to 25 degrees F (-4 C) (Li 1977).

Condition Level of Resistance Source
 Late Blight  Resistant  Machida-Hirano 2015
 Wart  Somewhat resistant  Machida-Hirano 2015
 Soft Rot / Blackleg  Somewhat resistant  Machida-Hirano 2015
 Potato Virus X  Somewhat resistant  Machida-Hirano 2015
 Potato Virus Y  Resistant  Machida-Hirano 2015
 Potato Leaf Roll Virus  Somewhat resistant  Machida-Hirano 2015
 Colorado Potato Beetle  Somewhat resistant  Machida-Hirano 2015
 Root Knot Nematode  Somewhat resistant  Machida-Hirano 2015
 Frost  Somewhat resistant  Machida-Hirano 2015
Drought Somewhat resistant Machida-Hirano 2015

Cultivation

I have found S. demissum difficult to germinate, with often low germination percentage and a prolonged germination period.

Crosses with S. tuberosum

 

Female Male Berry Set Seed Set Germination Ploidy Source
 S. tuberosum S. demissum Low Moderate     Jackson (1999)
 S. demissum S. tuberosum Moderate High     Jackson (1999)
             
             
             
             
             
             
             

Crosses with other species

Watanabe (1991) found that 2.3% of varieties of this species produced 2n pollen and Jackson (1999) found 3-9%, which would be effectively dodecaploid and 8EBN.

Female Male Berry Set Seed Set Germination Ploidy Source
             
             
             
             
             
             
             
             
             

Glykoalkaloid content