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Solanum pinnatisectum

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.

Hale (2008) found that S. pinnatisectum had very high antioxidant activity.

Resistances

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.

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
Alternaria solani (Early Blight) Fungus Somewhat resistant Jansky 2008
Drought Abiotic Somewhat resistant Machida-Hirano 2015
Globodera pallida (Pale Cyst Nematode) Invertebrate Not resistant Castelli 2003
Globodera pallida (Pale Cyst Nematode) Invertebrate Not resistant Bachmann-Pfabe 2019
Globodera rostochiensis (Potato Cyst/Golden Nematode) Invertebrate Not resistant Castelli 2003
Heat Abiotic Somewhat resistant Machida-Hirano 2015
Leptinotarsa decemlineata (Colorado Potato Beetle) Invertebrate Somewhat resistant Machida-Hirano 2015
Meloidogyne spp. (Root Knot Nematode) Invertebrate Somewhat resistant Machida-Hirano 2015
Pectobacterium carotovorum (Blackleg/Soft Rot) Bacteria Somewhat resistant Chung 2011, Machida-Hirano 2015
Phytophthora infestans (Late Blight) Fungus Resistant Machida-Hirano 2015
Phytophthora infestans (Late Blight) Fungus Resistant Bachmann-Pfabe 2019
Potato Virus Y (PVY) Virus Somewhat resistant Cai 2011, Machida-Hirano 2015
Ralstonia solanacearum (Bacterial Wilt) Bacteria Somewhat resistant Machida-Hirano 2015
Synchytrium endobioticum (Wart) Fungus Somewhat resistant Machida-Hirano 2015

Glykoalkaloid content

Images

Tubers of the wild potato species Solanum pinnatisectum
Solanum pinnatisectum tubers
Tubers of the wild potato species Solanum pinnatisectum
Solanum pinnatisectum tubers
   
       
       

Cultivation

I initially found this species difficult to germinate, but it turned out to just be an accession with unusually low germination.  Other accessions have germinated easily using standard conditions.  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