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Solanum pinnatisectum

Common Name(s)  
PloidyDiploid (2x)
Cytoplasm TypeW (Hosaka 2014)


Solanum pinnatisectum (pinnatisectum meaning that the leaflets are not completely separated) is 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.

ConditionLevel of ResistanceSource
Late BlightResistantMachida-Hirano 2015
WartSomewhat resistantMachida-Hirano 2015
Bacterial WiltSomewhat resistantMachida-Hirano 2015
Soft Rot / BlacklegSomewhat resistantMachida-Hirano 2015
Potato Virus YSomewhat resistantChung 2011, Machida-Hirano 2015
Colorado Potato BeetleSomewhat resistantMachida-Hirano 2015
Root Knot NematodeSomewhat resistantMachida-Hirano 2015
HeatSomewhat resistantMachida-Hirano 2015
DroughtSomewhat resistantMachida-Hirano 2015

Glykoalkaloid content




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).


Crosses with S. tuberosum

FemaleMaleBerry Set
Seed SetPloidyGermSource
S. tuberosumS. pinnatisectumNoneNone  Jackson (1999)
S. pinnatisectumS. tuberosumNoneNone  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.

FemaleMaleBerry Set
Seed SetPloidyGermSource


Solanum pinnatisectum at Solanaceae Source

Solanum pinnatisectum at GRIN Taxonomy


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