Return to Wild Potato Index Purchase seeds or tubers of Solanum pinnatisectum

Solanum pinnatisectum

Common Name(s)   A black and white photo of a tray of Solanum brevicaule tubers. They are about 1 to 2 inches long, oval, and similar in form to baking potatoes.
Code pnt
Synonyms  
Clade 1
Series Pinnatisecta
Ploidy Diploid (2x)
EBN 1
Self-compatible  
Genome
BB
Cytoplasm Type W (Hosaka 2014)

Description

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.

Resistances

Bethke (2017) scored wild potato species as a composite of seven resistance studies and S. pinnatisectum ranked in third place.

Condition Type Level of Resistance Source
Bacterial Wilt Bacteria Somewhat resistant Machida-Hirano 2015
Colorado Potato Beetle Invertebrate Somewhat resistant Machida-Hirano 2015
Drought Abiotic Somewhat resistant Machida-Hirano 2015
Early Blight Fungus Somewhat resistant Jansky 2008
Golden nematode (G. rostochiensis) Invertebrate Not resistant Castelli 2003
Heat Abiotic Somewhat resistant Machida-Hirano 2015
Late Blight Fungus Resistant Machida-Hirano 2015
Late Blight Fungus Resistant Bachmann-Pfabe 2019
Potato Cyst Nematode (G. pallida) Invertebrate Not resistant Castelli 2003
Potato Cyst Nematode (G. pallida) Invertebrate Not resistant Bachmann-Pfabe 2019
Potato Virus Y Virus Somewhat resistant Cai 2011, Machida-Hirano 2015
Root Knot Nematode Invertebrate Somewhat resistant Machida-Hirano 2015
Soft Rot / Blackleg Bacteria Somewhat resistant Chung 2011, Machida-Hirano 2015
Wart Fungus Somewhat resistant Machida-Hirano 2015

Glykoalkaloid content

Images

       
       
       

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).

Towill (1983) found that seeds of this species stored at 1 to 3 degrees C germinated at 100% after 20 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. 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 Ploidy Germ Source
             

References

Solanum pinnatisectum at Solanaceae Source

Solanum pinnatisectum at GRIN Taxonomy

 

Leave a Reply