Molecular marker based taxonomy and phylogeny of guinea yam dioscorea rotundata d. Although studies have examined single environmental factors and chemical treatments that might prolong tuber dormancy and storage, only a few were focused on further tuber sprouting. The ability of plants extract to protect yam tuber was also study. Dioscorea cayenensis and dioscorea rotundata are among the most important yam species for the humid and subhumid tropics. Towards sustainable production of new varieties of. Greenwich academic literature archive the prevalence of. Winged yam is known to have disprupted naturalarea plant communities, particularly coastal hammocks in south florida. The institute of food and agricultural sciences ifas is an equal opportunity institution authorized to provide research, educational information and other services only to individuals and institutions that function with nondiscrimination with respect to race, creed, color, religion, age, disability, sex, sexual orientation, marital status, national origin, political opinions or affiliations. Personal observations made in the zone from guinea to northern cameroon, however, long ago convinced the authors that rural. Dioscorea villosa is one of the species of yam referred to as wild yam dioscorea villosa has been claimed to alleviate symptoms of menopause, but there is currently no evidence to support this effect animal evidence suggests dioscorea villosa can increase skin thickness after lowdose supplementation. Originating in africa, yams dioscorea rotundata are tuberous vegetables very similar in appearance, but not related to sweet potatoes. The succinyl amount and the degree of substitution ds in sta. Nutritional potential of yam chips dioscorea cayenensis and. Use of cpssrs for the characterisation of yam phylogeny in.
This study examines chemical composition of dioscorea cayenensis and dioscorea rotundata poir species dried yam chips obtained using two methods of production in togo. Dioscorea used in chinese medicine with the example of. The domestication of yams dioscorea cayenensisrotundata is still an active process in west africa, but so far no specific research has been conducted to collect the knowledge held by traditional societies in which the yam is an important part of civilization. Two protein bands 82 and 28 kda were found under nonreducing conditions after sds. Badnaviruses have been reported to be the most prevalent in yam, and genomes of some other badnaviruses are known to be integrated in their host plant species. It is closely related to air potato dioscorea bulbifera. Taro and yams yams dioscoreaceae dioscorea species 600 species yam dioscorea species sixty species cultivated for food and pharmaceuticals monocot plant. Genetic diversity of sweet yam dioscorea dumetorum kunth. Molecular marker based taxonomy and phylogeny of guinea.
Many cultivars of the african dioscorea cayenemis d. The domestication of yams dioscorea cayenensisrotundata is still an active. Effects of storage conditions on sprouting of microtubers. A new steroidal saponin from dioscorea cayenensis marc sautour 1, anneclaire mitaineoffer 1, tomofumi miyamoto 2, alain dongmo 3, mariealeth lacailledubois 1. Download fulltext pdf download fulltext pdf ploidy level studies on the dioscorea cayenensisdioscorea rotundata complex core set article pdf available in euphytica 1693. Citations are the number of other articles citing this article, calculated by crossref and updated daily. The genus dioscorea includes about 350800 species distributed largely in the tropics, but also in warm and temperate regions. Isolation and characterization of microsatellites for the.
Molecular marker based taxonomy and phylogeny of guinea yam. Dioscorea villosa supplement health benefits, dosage, side. Mar, 2020 dioscorea cayenensis in world checklist of selected plant families. It is a commercially cultivated for its roots that have a rough outer skin and pale yellow flesh. Pdf in vitro induction of minitubers in yam dioscorea. Dormancy in yams experimental agriculture cambridge core. Species in this genus are dioecious, twining, and herbaceous to woody vines with single or clustered large tubers, some of which are edible and are known as. Also cultivated in east africa, particularly in uganda, are the two cultivar yams, the yellow guinea yam, d. Bitterness of dioscorea cayenensis journal of agricultural. The first 21 amino acids in the nterminal region of the 28 kda form were vedefsyiegnpngpenwgnl, which was highly homologous to deductive sequence of dioscorin from cdna of another yam species dioscorea cayenensis lam reported by conlan et al.
Pdf tuberisation was obtained in vitro on yam dioscorea cayenensis dioscorea rotundata complex. This study tested the effects of melatonin on shoot tips of d. We isolated nine polymorphic microsatellite markers using a microsatelliteenriched genomic library technique. The cryopreservation of yam is constrained with many challenges. Yellow yam dioscorea cayenensis important information. Click on names to expand them, and on p for plants profiles. It can survive in a number of different habitats and environmental conditions, but is most commonly found at the edges of rich, mesic bottomland forests, along stream banks and drainageways and near fencerows.
Yams boast a good fiber content, are low in fat, starchy and a bit dry. They are mostly grown for their starchy tubers both cultivated and wild and for medicinal properties. Chinese yam dioscorea opposita is an important tuberous crop used for both food and medicine. In vitro induction of minitubers in yam dioscorea cayenensisd. Ymv is a major factor limiting for stable production of yam and d. Martin, plant geneticist, mayaguez institute of tropical agri culture, agricultural research service, u. Developmental morphology of seedlings of dioscorea.
Species have been collected from all parts of the world and evaluated for steroidal sapogenins. These metrics are regularly updated to reflect usage leading up to the last few days. Shoot tips were encapsulated in beads loaded with 0. Our findings showed that the three plant extracts at various concentrations inhibited the mycelial growth of. Species in this genus are dioecious, twining, and herbaceous to woody vines with single or clustered large tubers, some of which are edible and are known as yams acevedorodriguez, 2005. Other articles where yellow guinea yam is discussed.
Nutritional potential of yam chips dioscorea cayenensis. A free powerpoint ppt presentation displayed as a flash slide show on id. This hypervigorous perennial is now a staple in my diet. Despite a long history of cultivation, the understanding of d. Purple yam ubeubi vines flowering in california harvesting dioscorea alata soon. Winged yam dioscorea alata is another nonnative, invasive vine in florida. Personal observations made in the zone from guinea to northern cameroon, however. Pdf evaluation of yam dioscorea cayenensis dioscorea.
It has been reported that many wild species contain the. Article views are the countercompliant sum of full text article downloads since november 2008 both pdf and html across all institutions and individuals. Ppt taro and yams powerpoint presentation free to view. Viruses are pervasive in yam worldwide, decreasing growth and yield, as well as hindering the international movement of germplasm. The control of field tuber dormancy in the yam dioscorea cayenensisd. Cultivated yams are vegetatively propagated while wild yams are sexually propagated and comprise both diploid and polyploid species. Categories vegetables tags dioscorea cayenensis, dioscorea rotundata, dioscorea trifida, how to cook yams, how to eat yams, yams, yams benefits, yams blood cholesterol, yams calories, yams for constipation, yams glycemic index, yams hypertension, yams metabolism, yams minerals, yams nutrition table, yams toxicity, yams vitamins 2 comments.
The common name for the genus, yams, will be used when discussing information applicable to 2 or more of the above species. Fifteen cultivars were tetraploids, five were hexaploids, and two were octoploids. We therefore suggest it is included within the yam cropwild relative. Article information, pdf download for domestication of yams dioscorea.
Covered with large leaves, it can quickly grow into the tops of tall trees. Dioscorea sansibarensis pax section macroura, zanzibar yam. Pdf ploidy level studies on the dioscorea cayenensis. Three different ploidy levels 4x,6x, 8x were detected within the samples analysed. Dioscorea alata ufifas center for aquatic and invasive plants. Plant biology and pathologybiologie et pathologie vegetales.
Dioscorea cayenensis in world checklist of selected plant families. Dioscorea rotundata genotypes with known ploidy levels were used as standards. Effects of storage conditions on sprouting of microtubers of yam dioscorea. Plants profile for dioscorea cayenensis yellow guinea yam. The cultivar group ekoto showed a high level of ploidy.
General information yellow yam is a climbing perennial plant, producing annual stems 10 12 metres from a tuberous rootstock332. Dioscorea rotundata is sometimes treated as a subspecies, and sometimes also as a separate species. Pdf tuber formation and development of dioscorea cayenensis. Kokoro is one of its most important cultivars it is sometimes treated as separate species from dioscorea cayennensis its wild progenitor is dioscorea praehensilis. Domestication of yams dioscorea cayenensisrotundata within. Isolation and characterization of microsatellites for the yam. It is sometimes treated as separate species from dioscorea cayennensis. There are several herbs derived from species of dioscorea used in chinese herb formulas, though only two are. Pdf yolou mounirou yam dioscorea cayenensisdioscorea rotundata is an important subsistence crop for food.
Jun 14, 2018 this effect suggests dioscorea villosa is a potentially useful supplement for skin care, but more research is needed before it can be specifically recommended as a cosmetic supplement. Studies on the relationship of dioscorea cayenensis and dioscorea. Dioscorea cayennensis yellow yam, yellow guinea yam pfaf. Many species of dioscorea contain sapogenin, a compound having medicinal value. Yam is demanding in terms of soil fertility, and it is generally the first crop after long term fallows in traditional cropping sys. Starch was extracted from dioscorea cayenensis yield, 87. This effect suggests dioscorea villosa is a potentially useful supplement for skin. The ploidy levels of the twentytwo yam dioscorea cayenensis d. Dioscorea cayennensis is a species of yam in the genus dioscorea that is a widely consumed west african domesticated crop. Dioscorea cayenensis in kew science plants of the world online. These are perennial herbaceous vines cultivated for the consumption of their starchy tubers in africa, asia, latin america, the caribbean and oceania. Yam is a staple food crop in west africa within the yam zone miege 1954, coursey 1965, 1967, as also in the cadbean, a part of southeast asia and the pacific islands. Effects of three aqueous plant extracts in the control of.
Dioscorea villosa supplement health benefits, dosage. Dioscorin, the major tuber storage protein of yam dioscorea. Dioscorea alata ufifas center for aquatic and invasive. Effects of storage conditions on sprouting of microtubers of yam dioscorea cayenensis. About the classification download classification for kingdom plantae down to genus dioscorea l. Lava, kenyon, lawrence, filloux, denis, galzi, serge, lopezmontes, antonio and iskracaruana, marieline 2014 the prevalence of badnaviruses in west african yams dioscorea cayenensis rotundata and evidence of endogenous pararetrovirus sequences in their genomes.
However, yam is susceptible to a range of serious and debilitating diseases including viruses. Developmental morphology of seedlings of dioscorea cayenensis. Classification for kingdom plantae down to genus dioscorea l. Effects of storage conditions on sprouting of microtubers of. Domestication of yams dioscorea cayenensisrotundata. The ploidy levels of the twentytwo yam dioscorea cayenensisd. To study patterns of yam evolution and to establish phylogenetic relationships existing between wild and cultivated species. General information yellow yam is a climbing perennial plant, producing annual stems 10 12 metres from a tuberous rootstock. Dioscorea villosa is claimed to alleviate symptoms of menopause because the molecular structures of the yam are similar to many steroidlike compounds. The board of trustees of the royal botanic gardens, kew. The dioscorea cayenensis dioscorea rotundata species complex is the most widely cultivated yam in west africa. Dioscorea oppositifolia is a fast growing twining vine that has escaped from cultivation. Transcriptome analysis reveals key pathways and hormone. Dioscorea baya formed a monophyletic group closely related to the cultivated clade.
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