Solanum paucissectum

Description

blankSolanum paucissectum (paucissectum means “poorly dissected,” referring to the leaflets) is a wild potato from Peru.  Plants are usually low-lying, sometimes as much as two feet tall.  Flowers white to light blue.  Berries small and ovoid. 

Jarvis (2008) predicts that this species will lose 95% of its present range by 2055 due to climate change, most likely entailing a critical loss of genetic diversity.

Resistances

Vega (1995) found that this species is much more frost tolerant than domesticated potato.  This is often true in low growing species.

Condition Type Level of Resistance Source
Alfalfa Mosaic Virus (AMV)   Resistant Horvath 1989 
Leptinotarsa decemlineata (Colorado Potato Beetle)   Resistant Pelletier (2007)
Potato Virus X (PVX)   Resistant Horvath 1989 
Tobacco Rattle Virus (TRV)   Resistant Horvath 1989

Glykoalkaloid content

Images

Seedlings of the wild potato species Solanum paucissectum
Solanum paucissectum seedlings
Flower of the wild potato species Solanum paucissectum
Solanum paucissectum flower
Flowers of the wild potato species Solanum paucissectum
Solanum paucissectum flowers
 
       
       

Cultivation

I have found this species difficult to germinate and with poor seedling survival, but that could be a consequence of choosing the wrong accessions.  I have now managed to get enough seedlings to propagate from the two USDA accessions, so we’ll hopefully soon be able to test fresh seed.

Accessions Evaluated

The following accessions were examined to prepare this profile.  I have evaluated 3/3 accessions currently available from the US potato genebank.

PI 365340

Poor germination but reasonably strong seedling growth.

PI 473489

Poor and irregular germination and weak seedling growth.  It did eventually produce a few healthy plants though.

PI 590922

An in vitro accession from Piura, Peru.  Certainly the easiest way that I found to grow this often difficult to germinate species.  CIP public domain MTA.

Breeding

Crosses with S. tuberosum

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

Crosses with other species

Jackson (1999) found 6% 2n pollen for varieties of this species.

Female Male Berry Set Seed Set Germination Ploidy Source
             

References

Solanum paucissectum at Solanaceae Source

Solanum paucissectum at GRIN Taxonomy

Solanum paucissectum at CIP

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