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 pinnatisectum

Common Name(s):

Synonyms: none

Series: Pinnatisecta

EBN: 1

Ploidy: Diploid

Segregation: Disomic

Self-compatible:

Cytoplasm Type: W (Hosaka 2014)

Description

A dryland species from central Mexico with long, thin leaves.  This sort of development occurs also in South American species growing under similar conditions, such as S. peloquinianum.  It is interesting to observe how widely separate plants adapt to conditions in a similar fashion.

Plants about 15 to 24 inches tall.  Unusual berries with dark green stripes and lots of white speckles.

This species can survive frosts down to 27 degrees F (-3 C) (Li 1977).  Vega (1995) found that this species is about as frost tolerant as domesticated potato.

Condition Level of Resistance Source
Late Blight Resistant Machida-Hirano 2015
Wart Somewhat resistant Machida-Hirano 2015
Bacterial Wilt Somewhat resistant Machida-Hirano 2015
Soft Rot / Blackleg Somewhat resistant Machida-Hirano 2015
Potato Virus Y Somewhat resistant Chung 2011, Machida-Hirano 2015
Colorado Potato Beetle Somewhat resistant Machida-Hirano 2015
Root Knot Nematode Somewhat resistant Machida-Hirano 2015
Heat Somewhat resistant Machida-Hirano 2015
Drought Somewhat resistant Machida-Hirano 2015

Glykoalkaloid content

Cultivation

I have found this species difficult to germinate.  It may require different conditions than the standard for S. tuberosum.  The USDA potato genebank has observed that germination of some accessions of this species is inhibited by GA3 (Bamberg 1999).  In the wild. plants flower and fruit from July to September (Spooner 2004).

Breeding

Crosses with S. tuberosum

Female Male Berry Set Seed Set Germination Ploidy Source
S. tuberosum S. pinnatisectum None None     Jackson (1999)
S. pinnatisectum S. tuberosum None None     Jackson (1999)

Crosses with other species

Watanabe (1991) found that 14.8% of varieties of this species produced 2n pollen and Jackson (1999) found 3-13%, which would be effectively tetraploid and 2EBN.

Female Male Berry Set Seed Set Germination Ploidy Source
             

 

 

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