Although the 49 plastome sequences of 14 dioscorea species 9 and the nuclear genome sequence of dioscorea. Click below on a thumbnail map or name for species profiles. This page was last edited on 27 november 2012, at 11. Pdf the digestibility and metabolism of diets based on flours prepared from raw, boiled or steamed tubers of the sweet yam dioscorea dumetorum were.
Pdf nutritional quality of yam dioscorea dumetorum and d. Like many other vegetatively propagated crops, yam diseases are also perpetuated and spread mainly through. Quality characteristics of processed flours from trifoliate yam dioscorea dumetorum as influenced by steeping and boiling in varying concentration of trona solution over time author. Files are available under licenses specified on their description page. Trifoliate yam dioscorea dumetorum is one example of an orphan crop, not traded internationally. Genomic resources are required for trifoliate yam to improve breeding for nonhardening varieties and for other traits. Antiinflammatory studies of yam dioscorea esculenta extract on wistar rats j. Year 1983 isbn 0333242688 description an excellent, indepth look at the main vegetable crops that can be grown in the tropics, plus many less wellknown plants. The tubers were harvested and stored under tropical ambient 28c and cold room conditions 4c for 24, 48 and 72 h.
The board of trustees of the royal botanic gardens, kew. Traditional food processing techniques of dioscorea dumetorum. Its fleshy tuber can be used as food during famine and as medicine. The increasing use of starch as alternative raw material for petroleum based chemical has been creating pressure on the food chain as most starches are obtained from food sources like cassava. Pdf nutritional quality of yam dioscorea dumetorum and.
Thus, access to a complete and wellannotated genome sequence is one. Dioscorea root extract benefit and side effects by ray sahelian, m. Postharvest hardening of the tubers of this species starts within 24 h after harvesting and renders the tubers inedible. Nutritional quality of yam dioscorea dumetorum and d rotundata. Nutritional quality of yam dioscorea dumetorum and d. Dioscorea dumetorum is the most nutritious sefadeheh and afoakwa, 2002. Starch was extracted from tuber of wild yam dioscorea species dioscorea praehensilis, d. Dioscorea dumetorum, d rotundutu, yam flours, diet, rat, nutritional evaluation, nitrogen, digestible carbohydrate, fibre, minerals. The species originated in tropical africa and occurs in both wild and cultivated forms. Production and quality evaluation of yam dioscorae. It is named after the ancient greek physician and botanist dioscorides.
The tuber is commonly called cluster yam because it occurs naturally in clusters, bitter yam or trifoliate yam, and it is called ona by the igbos of southeast nigeria 9. Pdf batatasin i was shown to occur in the fresh rhizomes of poisonous yam dioscorea dumetorum pax. Nutritional quality of yam dioscorea dumetorum and. Dioscorea is a genus of over 600 species of flowering plants in the family dioscoreaceae, native throughout the tropical and warm temperate regions of the world. The yam species dioscorea dumetorum is one example of an orphan crop, not traded internationally.
Physicochemical, functional, and macromolecular properties of. All structured data from the file and property namespaces is available under the. Dioscorea dumetorum famine foods purdue university. The vast majority of the species are tropical, with only a few species extending into temperate climates.
It is also called threeleaved yam, trifoliate yam, cluster yam, or african bitter yam. Pdf isolation of batatasin i from dioscorea dumetorum rhizomes. The english common names for dioscorea dumetorum include african trifoliate yam, three leafed yam, bitter yam and. Chemical composition and quality changes occurring in. These are perennial herbaceous vines cultivated for the. Dioscorea is a genus of great economic value, including important food plants. Effects of waxing materials and storage periods on physico. The species is dioecious individual flowers are either male or female, but only one sex is to be found on any one plant so both male and female plants must be grown if seed is required.
Abstract the digestibility and metabolism of diets based on flours prepared from raw, boiled or steamed tubers of the sweet yam dioscorea dumetorum were. Alterations in cell wall constituents of yams dioscorea. Dioscorea dumetorumfed rats exhibited decreased body. Yam, a tropical crop in the genus dioscorea, has as many as 600 species out of which six are economically important staple species. Although the 49 plastome sequences of 14 dioscorea species 9 and the nuclear genome sequence of dioscorea rotundata 8 50 have been published, there is still a need for data from.
Dioscorea dumetorum pax is a tropical plant that belongs to the genus dioscorea and family dioscoreaceae bhattacharjee et al. Dec 18, 2018 dioscorea dumetorum kunth is the most nutritious among the eightyam species, commonly grown and consumed in west and central africa. The present study aimed to document the indigenous knowledge related to its. All structured data from the file and property namespaces is available under the creative commons cc0 license. Genetic diversity of sweet yam dioscorea dumetorum kunth.
Introduction of flour from dioscorea dumetorum in rural area by gerard martin, serge treche, l. Dioscorea species are widely used plants not only in eastern traditional medicine but also in modern western medicine. Effects of waxing materials and storage periods on physicochemical properties of trifoliate yam dioscorea dumetorum ezeocha, v. General information about dioscorea dumetorum diudu eppo global database.
Dioscorea dumetorum in kew science plants of the world online. Genetic diversity of sweet yam dioscorea dumetorum kunth pax. The morphology of starch granule was observed under a scanning. The plant list includes a further 316 scientific plant names of infraspecific rank for the genus dioscorea. A comparison of some pharmacological properties of dioscorine. Wild forms are in general poisonous due to the presence of the alkaloids dioscorine and dihydrocortisone 1, 9, 14, 15, 2123. Dioscorea dumetorum kunth is the most nutritious among the eightyam species, commonly grown and consumed in west and central africa. Physicochemical, functional, and macromolecular properties of waxy yam starches discovered from mapuey dioscorea trifida genotypes in the venezuelan amazon elevina pe. Moistureheat treatment of tubers before pro cessing into flour improves the nutritional value, especially for d rotundutu. Postharvest hardening starts within 24 hours after harvesting and renders the tubers inedible. There is therefore need to secure alternative starch. In the gold coast ghana, the tuber contains a water soluble toxicant, dioscorine, which is leached out.
Title vegetables in the tropics publication author tindall. Media in category dioscorea dumetorum this category contains only the following file. Ajaiyeoba department of pharmacognosy, university of ibadan, ibadan, nigeria. Like many other vegetatively propagated crops, yam diseases are also perpetuated and spread mainly through infected planting materials. Full text full text is available as a scanned copy of the original print version. Functional properties of bitter yam dioscorea dumetorum. The results showed a wide variety of starches from one species to another at the. Genome sequence assembly of trifoliate yam dioscorea. Nutritional quality of yam dioscorea dumetorum and d rotundata flours for growing rats article pdf available in journal of the science of food and agriculture 664. The objective of this work therefore is to evaluate the chemical, functional and pasting properties of the starch from fourteen trifoliate yam land races. Dioscorea rotundata white guinea yam, dioscorea alata yellow yam, dioscorea bulbifera aerial yam, dioscorea esculant chinese yam and dioscorea dumetorum. However, these two species belong to the same section of dioscorea d.
Dioscorea dumetorum kunth pax family dioscoreaceae on jstor. The starchy tubers may be single but are usually produced in clusters, in a stand of the plant. Trifoliate yam or threeleafed yam dioscorea dumetorum pax belongs to the genus dioscorea and family dioscoreaceae onwueme, 1978. Dioscorea dumetorum in world checklist of selected plant families. Control of hyperlipidaemia, hypercholesterolaemia and. Dioscorea dumetorum is an important native tuber crop commonly grown in west africa.
Studies were conducted on the chemical composition, as well as the biochemical and textural changes, occurring during storage of two cultivars of dioscorea dumetorum yam tubers. Traditional food processing techniques of dioscorea. The plant has both the wild and cultivated species. The tuber is commonly called cluster yam because it occurs. Gwangwaa we taught 25 village volunteers a simple method to produce flour from dioscorea dumerorum tubers by drying precooked slices and grinding them in a dieselpowered mill. Dioscorea dumetorum pax as an alternative starch source. A comparison of some pharmacological properties of. The plant list includes 1,192 scientific plant names of species rank for the genus dioscorea. Links to pubmed are also available for selected references. Get a printable copy pdf file of the complete article 556k, or click on a page image below to browse page by page. So far, a genome sequence assembly for dioscorea rotundata guinea yam 8 and a reference genetic map for dioscorea alata greater yam 9 have been released. Genetic diversity and population structure of trifoliate yam. An eighteen year 19972015 study was therefore used to document the vernacular names and traditional food processing methods of cultivated and wild d. An dioscorea dumetorum in nahilalakip ha genus nga dioscorea, ngan familia nga dioscoreaceae.
Dioscorea dumetorum kunth is the most nutritious among the eightyam. The influence of cultivar on the postharvest hardening of dioscorea dumetorum tubers was assessed. Dioscorea dumetorum has the highest nutrient value among eight other yam species commonly grown and consumed in west and central africa. Characterization of chemical composition and antinutritional. Full text is available as a scanned copy of the original print version. Bitter yam dioscorea dumetorum belongs to the genus dioscorea and family. Trifoliate yam dioscorea dumetorum is a high yielding but under exploited yam species. Diosgenin is a steroidal saponin, which is extracted from the root of wild yam dioscorea villosa and other species. Genetic diversity and population structure of trifoliate. Mar, 2020 dioscorea dumetorum in world checklist of selected plant families. Dioscorea dumetorum pax as an alternative starch source for industrial applications doi. Dioscorea dumetorum kunth pax bitter yam subordinate taxa. An dioscorea dumetorum in uska species han liliopsida nga syahan ginhulagway ni carl sigismund kunth, ngan ginhatag han pagkayana nga asya nga ngaran ni ferdinand albin pax.
Dioscorea dumetorum pax as an alternative starch source for. Pdf dioscorea dumetorum pax as an alternative starch. Phytochemical screening and nutritional quality of yam. Antiinflammatory studies of yam dioscorea esculenta extract. We have utilized amplified fragment length polymorphisms aflp in conjunction with chloroplast dna cpdna sequence data to study the genetic diversity in 53 accessions of dioscorea dumetorum from. Seed yam production from minisetts iita bibliography. The plants database includes the following 30 species of dioscorea. Potentials of trifoliate yam dioscorea dumetorum longdom. Accepted 4 july, 2007 the defatted methanol extract of dioscorea esculenta tuber was evaluated for antiinflammatory properties in animal model using wistar rats. Amylase from germinating tubers of a yam dioscorea dumetorum was extracted and purified by four steps of purification. Dioscorea bulbifera bulbil and tuber dioscorea multiflora, dioscorea burkilliana, dioscorea dumetorum and dioscorea togoensis picked in the ivory coast forest zone, have been determined. Tuber replaced annually, much divided with short or cylindric roundended rootbearing lobes up to 2. Dioscorea dumetorum, also known as the bitter yam, cluster yam, or threeleaved yam, is a species of yam in the genus dioscorea that is found in africa.
Genetic diversity of 43 dioscorea dumetorum accessions and two of dioscorea cayenensis lam as out group species was evaluated for. Dioscorea dumetorum diuduoverview eppo global database. Tubers of the wild yam species dioscorea praehensilis, d. Technical sheet of some wild yam dioscorea species starch. Dioscorea batatas is a perennial growing to 3 m 9ft by 1. The bulk of fifty tubers sampled from ten sellers five each were separated into damage and undamaged except for tubers of dioscorea dumetorum. Year 1983 isbn 0333242688 description an excellent, indepth look at the main vegetable crops that can be. Pdf genetic diversity of dioscorea dumetorum kunth pax. Nimenibouadia r, 2003 hypolipidaemic effect of dioscorea dumetorum pax tuber 184 trop j pharm res, june 2003. Several species are widely cultivated in many cultivars including dioscorea alata d. A web site containing information about the flora of zimbabwe. Trifoliate yam is also known as cluster yam because of the nature of the tubers kay, 1987. Characterization of chemical composition and antinutritional factors in seven species within the ghanaian yam dioscorea germplasm 987 international food research journal 193. In order to remove toxins, the wild form needs to be leached in water for days and thoroughly cooked.
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