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

Solanum hjertingii

Common Name(s)  
Solanum hjertingii plant
Solanum hjertingii plant
Code hjt
Synonyms S. fendleri var. physaloides, S. leptosepalum, S. matehualae
Clade 1+4
Series Longipedicellata
Ploidy Tetraploid (4x)
EBN 2
Tuberization Photoperiod
Short day
Self-compatible Probably
Genome
AABB
Cytoplasm Type D (Hosaka 2014)
Citation
Hawkes: A revision of the tuber-bearing Solanums, 2nd ed: 123, 171. 1963.

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.  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 most 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.

Condition Type Level of Resistance Source
Aphids   Somewhat resistant Radcliffe 1970
Soft Rot / Blackleg   Somewhat resistant Machida-Hirano 2015 
Tuber Blackening   Somewhat resistant Machida-Hirano 2015 

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).

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
 
       

Cultivation

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

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

Leave a Reply