This page is a draft, part of our ongoing wild potato project. I’ll probably be adding information to the species pages through 2020 at least, but I’m making them public since they may be useful even incomplete.

Solanum guerreroense


Series: Iopetala

EBN: 4

Ploidy: Hexaploid

Segregation: Unknown

Self-compatible: Yes

Cytoplasm Type: D (Hosaka 2014)


A species of very limited distribution in Guerrero, Mexico, where it grows in conifer and oak forests.  It is only known from a single collection and expeditions since have failed to locate any plants (Spooner 2004).  It may be synonymous with S. iopetalum (Marks 1965).  Plants reach about nine inches tall.  Violet flowers.

Condition Level of Resistance Source
Potato Spindle Tuber Viroid Somewhat Resistant Machida-Hirano 2015
Potato Virus X Somewhat Resistant Turuleva 1990
Potato Virus Y Somewhat Resistant Turuleva 1990

Glykoalkaloid content


I have found this species easy to germinate, taking about the same amount of time as S. tuberosum.

Hawkes (1956) reported that, although this species is self-fertile, it requires hand pollination in order to set seed.


Crosses with S. tuberosum

Watanabe (1991) found that 100% (of only two plants) of varieties of this species produced 2n pollen.

Female Male Berry Set Seed Set Germination Ploidy Source
S. tuberosum S. guererroense Minimal None     Jackson (1999)
S. guererroense S. tuberosum Low Moderate     Jackson (1999)
S. guerreroense S. tuberosum (cv. Superb) Yes Yes     Carlson-Nilsson (2010)
S. guerreroense S. tuberosum subsp. andigenum Yes Yes     Carlson-Nilsson (2010)

Crosses with other species

In crosses between the Mexican hexaploid species, Hawkes (1956) found that only the progeny of the S. guerreroense x S. iopetallum cross set seed successfully.

Female Male Berry Set Seed Set Germination Ploidy Source
S. guerreroense S. iopetallum (as S. brachycarpum) Low Low High Hexaploid Hawkes (1956)
S. guerreroense S. demissum Yes Yes     Hawkes (1956)
S. demissum S. guerreroense Yes Yes     Hawkes (1956)
S. guerreroense S. hougasii (as S. spectabile) Yes Yes High Hexaploid Hawkes (1956)



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