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Common Name(s)  
Code vio
Synonyms S. multiflorum, S. urubambae, S. villuspetalum
Clade 4
Series Conicibaccata
Ploidy Diploid (2x)
EBN 2
Self-compatible No
Cytoplasm Type  

Description

Native to the eastern slopes of the Bolivian Andes, at elevations of roughly 6500 to 11200 feet.  An unusual species, thought not to be closely related to other wild potatoes.  Very tall plants, reaching nine feet in height.  Stolons three feet or more.  Tubers reaching two to three inches in length, more in cultivation.  Purple flowers.  Berries conical.

This species can survive frosts down to 27 degrees F (-3 C) (Li 1977), about the same as the domesticated potato.  Even though it grows at relatively high elevations, It has poor frost resistance compared to most wild potatoes, most likely because the eastern slopes of the Andes to which it is native are warmed by updrafts from the Amazon basin (Smillie 1983).

Condition Level of Resistance Source
Alfalfa Mosaic Virus Resistant Horvath 1989
Cucumber Mosaic Virus Resistant Horvath 1989
Potato Virus X Resistant Horvath 1989

Glykoalkaloid content

Images

     
       
       

Cultivation

I have found seeds of this species slow and difficult to germinate using the standard conditions for S. tuberosum.

Breeding

Crosses with S. tuberosum

Watanabe (1991) found that 2.8% of varieties of this species produced 2n pollen, which would be effectively tetraploid and 4EBN.

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

Crosses with other species

Female Male Berry Set Seed Set Germination Ploidy Source
S. violaceimarmoratum S. stipuloideum (as S. circaefolium and var. capsibaccatum and var circaefolium)  Low Very Low  Yes   Ochoa 2004
S. stipuloideum (as S. circaefolium and var. capsibaccatum and var circaefolium) S. violaceimarmoratum Low  None     Ochoa 2004
S. violaceimarmoratum S. commersonii  No No     Ochoa 2004 
S. commersonii S. violaceimarmoratum  No  No     Ochoa 2004 
S. violaceaimarmoratum S. laxissimum High High  Yes   Ochoa 2004 
S. laxissimum S. violaceaimarmoratum High High     Ochoa 2004 
S. violaceaimarmoratum S. limbaniense  High High  Yes   Ochoa 2004 
S. limbaniense S. violaceaimarmoratum  High  High     Ochoa 2004 
S. violaceaimarmoratum S. rhomboideilanceolatum  High  High  Yes   Ochoa 2004 
S. rhomboideilanceolatum S. violaceaimarmoratum High High     Ochoa 2004
S. violaceaimarmoratum S. chomatophilum No No     Ochoa 2004
S. chomatophilum S. violaceaimarmoratum No No     Ochoa 2004
S. violaceaimarmoratum S. humectophilum None None     Ochoa 2004
S. humectophilum S. violaceaimarmoratum Low Low     Ochoa 2004

 

 

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