Dioscorea cayenensis subsp. rotundata, commonly known as the white yam, West African yam,[1] Guinea yam, or white ñame, is a subspecies[2] of yam native to Africa. It is one of the most important cultivated yams.[3] Kokoro is one of its most important cultivars.
| Dioscorea cayenensis subsp. rotundata | |
|---|---|
| |
| White yam | |
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Monocots |
| Order: | Dioscoreales |
| Family: | Dioscoreaceae |
| Genus: | Dioscorea |
| Species: | |
| Subspecies: | D. c. subsp. rotundata
|
| Trinomial name | |
| Dioscorea cayenensis subsp. rotundata | |
It is sometimes treated as separate species from Dioscorea cayenensis.[1]
Domestication
editIts wild progenitor is Dioscorea praehensilis[1] and possibly also D. abyssinica (by hybridization).[4] Domestication occurred in West Africa, along the south-facing Atlantic coast. There is insufficient documentation and as of 2009[update] insufficient research to determine how long ago that occurred.[5]
Distribution
editD. c. subsp. rotundata is grown in West Africa, including countries such as Ivory Coast, Ghana and Nigeria.[6]
Linguistics
editBlench (2006) reconstructs the tentative Proto-Niger-Congo (i.e., the most recent common ancestor of the Niger-Congo languages) root -ku for D. rotundata.[1]
References
edit- ^ a b c d Blench, Roger (2006). Archaeology, language, and the African past. Altamira Press. ISBN 9780759104655.
- ^ The Plant List: Dioscorea cayenensis subsp. rotundata
- ^ USDA PLANTS profile for Dioscorea rotundata
- ^ Sugihara, Yu; Kudoh, Aoi; Oli, Muluneh Tamiru; Takagi, Hiroki; Natsume, Satoshi; Shimizu, Motoki; Abe, Akira; Asiedu, Robert; Asfaw, Asrat; Adebola, Patrick; Terauchi, Ryohei (2021). "Population Genomics of Yams: Evolution and Domestication of Dioscorea Species". Population Genomics. doi:10.1007/13836_2021_94.
- ^ Purugganan, Michael D.; Fuller, Dorian Q. (2009). "The nature of selection during plant domestication". Nature. 457 (7231). Nature Research: 843–848. Bibcode:2009Natur.457..843P. doi:10.1038/nature07895. ISSN 0028-0836. PMID 19212403. S2CID 205216444.
- ^ Biodiversity and domestication of yams in West Africa: Traditional practices leading to Dioscorea rotundata Poir. Roland Dumont et al. 2005, CIRAD-IPGRI
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