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

Solanum hjertingii

Description

Solanum hjertingii distribution map
Solanum hjertingii distribution map

Solanum hjertingii (hjertingii in honor of Danish botanist Jens Peter Knudsen Hjerting) is a northern Mexican species, primarily Coahuila and Nuevo Leon.  Small plants, reaching about 7 to 14 inches tall.  Stolons as long as three feet.  Tubers usually 1 to 2 inches in diameter, sometimes as much as 3 inches.  Violet flowers.

This species is an allotetraploid, carrying clade 1 and clade 4 genomes.  Hawkes (1990) expected an AABB genome configuration for this species, confirmed by Pendinen (2008), who determined that the A genome contributor was S. verrucosum and the B genome contributor was one of S. cardiophyllum, S. ehrenbergii, or S. jamesii.  This species appears to be closely related to S. stoloniferum (Van den Berg 2002).

Resistances

S. hjertingii is very resistant to bruising compared to domesticated varieties (Gubb 1989) and has low levels of polyphenol oxidase, an enzyme implicated in potato browning (Sim 1997, Brown 1999).

Vega (1995) found that this species is less frost tolerant than domesticated potato.

I have noticed that this species is unusually vulnerable to black scurf here.  I rarely observe it on domesticated varieties or other wild species, but it appears reliably on S. hjertingii.  You can even see it in the title picture.

Condition Type Level of Resistance Source
Alternaria solani (Early Blight) Fungus Somewhat resistant Jansky 2008
Bruising Abiotic Somewhat resistant Machida-Hirano 2015 
Globodera pallida (Pale Cyst Nematode) Invertebrate Not resistant Bachmann-Pfabe 2019
Myzus persicae (Green Peach Aphid) Invertebrate Somewhat resistant Radcliffe 1970
Pectobacterium carotovorum (Blackleg/Soft Rot) Bacteria Somewhat resistant Chung 2011, Machida-Hirano 2015 
Phytophthora infestans (Late Blight) Fungus Somewhat resistant Bachmann-Pfabe 2019
Potato Virus Y (PVY) Virus Somewhat resistant Cai 2011
Rhizoctonia solani (Black Scurf) Fungus Not resistant

Glykoalkaloid content

I have found no account of tuber glycoalkaloids in S. hertingii.  Foliar glycoalkaloids appear to consist primarily of solanine and chaconine (Gregory 1981).

Many of the tubers that I have sampled from plants of this species seemed entirely palatable.  A few had a mild bitter aftertaste.

Images

Solanum hjertingii plant
Solanum hjertingii plant
Solanum hjertingii plant
Solanum hjertingii plant
Solanum hjertingii flower
Solanum hjertingii flower
Solanum hjertingii inflorescence
Solanum hjertingii inflorescence
Solanum hjertingii flower
Solanum hjertingii flower
Solanum hjertingii flower
Solanum hjertingii flower
Berries of the wild potato species Solanum hjertingii
Solanum hjertingii berries
Tubers of the wild potato species Solanum hjertingii
Solanum hjertingii tubers
       

Cultivation

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

Towill (1983) found that seeds of this species stored at 1 to 3 degrees C germinated at 82% after 26 years.

Breeding

Culley (2002) found that triploid progeny of diploid S. tuberosum x S. hjertingii were resistant to bruising and low in polyphenol oxidase.

Crosses with S. tuberosum

Female Male Berry Set
Seed Set Germ Ploidy Source
S. hjertingii S. tuberosum (4x)
None None     Jackson (1999)
S. tuberosum (2x) S. hjertingii Yes Yes Yes 3x Culley (2002)
S. tuberosum (4x)
S. hjertingii Low None     Jackson (1999)

Crosses with other species

Watanabe (1991) found that 9.1% of varieties of this species produced 2n pollen and Jackson (1999) found 6-21%, which would be effectively octaploid and probably 4EBN.

Female Male Berry Set
Seed Set Germ Ploidy Source
             

References

Solanum hjertingii at Solanaceae Source

Solanum hjertingii at GRIN Taxonomy

Solanum hjertingii at CIP