Fragaria

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Fragaria (Template:IPAc-en)<ref>Sunset Western Garden Book, 1995: 606–07</ref> is a genus of flowering plants in the rose family, Rosaceae, commonly known as strawberries for their edible fruits. There are more than 20 described species and many hybrids and cultivars. The most common strawberries grown commercially are cultivars of the garden strawberry, a hybrid known as Fragaria × ananassa. Strawberries have a taste that varies by cultivar, and ranges from quite sweet to rather tart. Strawberries are an important commercial fruit crop, widely grown in all temperate regions of the world.

DescriptionEdit

Strawberries are not berries in the botanical sense.<ref name=Esau>Esau, K. 1977. Anatomy of seed plants. John Wiley and Sons, New York.</ref> The fleshy and edible part of the "fruit" is a receptacle, and the parts that are sometimes mistakenly called "seeds" are achenes and therefore the true botanical fruits.<ref name=Esau/><ref>E-Flora BC: Electronic Atlas of the Plants of British Columbia: Fragaria virginiana.</ref>

EtymologyEdit

The genus name {{#invoke:Lang|lang}} derives from {{#invoke:Lang|lang}} ("strawberry") and {{#invoke:Lang|lang}}, a suffix used to create feminine nouns and plant names. The Latin name is thought in turn to derive from a Proto-Indo-European language root meaning "berry", either *dʰreh₂ǵ- or *sróh₂gs.<ref>Template:Cite book</ref>

The semantic motivation behind the English name "strawberry" (from Old English strēawberie<ref name=BierSaue11>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>) is unclear. Various suggestions have been put forward. One is that the name derives from the old practice of gathering strawberries by stringing them on a straw or stalk. Alternatively, "straw" may refer to the long, thin runners found on members of the genus. The term is absent from the other Germanic languages, which instead use words meaning "earth berry".<ref>Template:Cite journal</ref>

ClassificationEdit

There are more than 20 different Fragaria species worldwide. A number of other species have been proposed, some of which are now recognized as subspecies.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> One key to the classification of strawberry species is that they vary in the number of chromosomes. They all have seven basic types of chromosomes, but exhibit different polyploidy. Some species are diploid, having two sets of the seven chromosomes (14 chromosomes total), but others are tetraploid (four sets, 28 chromosomes total), hexaploid (six sets, 42 chromosomes total), octoploid (eight sets, 56 chromosomes total), or decaploid (ten sets, 70 chromosomes total).

As a rough rule (with exceptions), strawberry species with more chromosomes tend to be more robust and produce larger plants with larger berries.<ref>Darrow, George M. The Strawberry: History, Breeding and Physiology. New York. Holt, Rinehart and Winston, 1966. online text Template:Webarchive</ref>

The oldest fossils confidently classifiable as Fragaria are from the Miocene of Poland. Fossilised Fragaria achenes are also known from the Pliocene of China.<ref>Template:Cite journal</ref>

Diploid speciesEdit

File:Fragaria daltoniana.jpg

Fragaria daltoniana, a species from the Himalayas

File:Fragaria vesca 2.jpg

Woodland strawberry (Fragaria vesca), a Northern Hemisphere species

File:Fragarianilgerrensis.jpg

Flower of Fragaria nilgerrensis, an Asian species

File:Sosnovka Bekovo 2014 Wild Strawberries.jpg

Wild strawberries (Fragaria viridis) from Sosnovka, Penza Oblast, Russia

File:Fragaria viridis fruit - Keila.jpg

Fragaria viridis fruit photographed in Keila, Estonia

Fragaria × bifera Duchesne - F. vesca × F. viridis (Europe)
Fragaria bucharica Losinsk. (China)
Fragaria chinensis Losinsk (China)
Fragaria daltoniana J.Gay (Himalayas)
Fragaria emeiensis Jia J. Lei (China)
Fragaria gracilis Losinsk. (China)
Fragaria hayatae Makino (Taiwan)
Fragaria iinumae Makino (East Russia, Japan)
Fragaria mandshurica Staudt (China)
Fragaria nilgerrensis Schlecht. ex J.Gay (South and Southeast Asia)
Fragaria nipponica Makino (Korea, Japan)
Fragaria nubicola Lindl. ex Lacaita (Himalayas)
Fragaria pentaphylla Losinsk. (China)
Fragaria vesca L. - woodland strawberry (Northern Hemisphere)
Fragaria viridis Duchesne (Europe, Central Asia)

Tetraploid speciesEdit

Fragaria corymbosa Losinsk. (northern China)
Fragaria × intermedia (Bach) Beck (Europe)

Fragaria moupinensis Cardot (China)
Fragaria orientalis Losinsk. (Eastern Asia, Eastern Siberia)
Fragaria tibetica Staudt & Dickoré (China)

Pentaploid hybridsEdit

Fragaria × bringhurstii Staudt (coast of California)

Hexaploid speciesEdit

Fragaria moschata Duchesne - musk strawberry (Europe)

Octoploid species and hybridsEdit

Fragaria × ananassa Duchesne ex Rozier - garden strawberry, pineapple strawberry
Fragaria chiloensis (L.) Mill. - beach strawberry (Western Americas)
- Fragaria chiloensis subsp. chiloensis forma chiloensis
- Fragaria chiloensis subsp. chiloensis forma patagonica (Argentina, Chile)
- Fragaria chiloensis subsp. lucida (E. Vilm. ex Gay) Staudt (coast of British Columbia, Washington, Oregon, California)
- Fragaria chiloensis subsp. pacifica Staudt (coast of Alaska, British Columbia, Washington, Oregon, California)
- Fragaria chiloensis subsp. sandwicensis (Decne.) Staudt - Template:Okinaōhelo papa ([[Hawaii|HawaiTemplate:Okinai]])
Fragaria virginiana Mill. - Virginia strawberry (North America)

Decaploid species and hybridsEdit

Fragaria cascadensis K.E. Hummer (Cascade Mountains in Oregon)<ref>Template:Cite journal</ref>
Fragaria iturupensis Staudt - Iturup strawberry (Iturup, Kuril Islands)
Fragaria × Comarum hybrids
Fragaria × vescana

Polyploidy unknownEdit

Fragaria tayulinensis S.S.Ying (Taiwan)

Uncategorized hybridsEdit

'Lipstick' (Fragaria × Comarum hybrid), red-flowered runnering ornamental, sparse small globular fruits.
Fragaria vesca and certain other diploid species can be hybridized and produce fertile offspring (although Fragaria nilgerrensis appears less compatible).<ref>Template:Cite journal</ref>
Fragaria moschata can hybridize with diploid species such as Fragaria viridis and Fragaria nubicola but producing a lower proportion of viable seeds.<ref>Template:Cite journal</ref>
Fragaria moschata can hybridize with Fragaria × ananassa.<ref>Template:Cite magazine</ref>