|Cytoplasm Type||W (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.
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|
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.
Crosses with S. tuberosum
|S. tuberosum||S. pinnatisectum||None||None||Jackson (1999)|
|S. pinnatisectum||S. tuberosum||None||None||Jackson (1999)|
Crosses with other species