Dioscorea villosa is claimed to alleviate symptoms of menopause because the molecular structures of the yam are similar to many steroidlike compounds. Antidiabetic activity of ethanolic extract of tubers of. The study of physical properties of dioscorea alatas. Its botanical name is dioscorea polystachya mistakenly called d. Control of dioscorea alata microtuber dormancy and. India is a harbor of biodiversity in general and phytodiversity in particular. Dioscorea is a genus of great economic value, including important food plants. Pdf the impact of cooking on the proximate composition. Winged yam dioscorea alata is another nonnative, invasive vine in florida. The yams were peeled and washed, 100 grams samples coded sample a to g were subjected to two different drying conditions.
Growth and distribution of roots of dioscorea alata l. The niacin content in the tubers of dioscorea alata, d. The tuber flesh has white cream or light purple in color. Introduction for many people in the world the word yni or its translation, refers to dioscorea alata l. This species was also evaluated using the predictive tool. To ascertain the potential health benefits and alternate usage of the species, 20 varieties of dioscorea alata. Department of crop and soil science, faculty of agriculture, niger delta university, wilberforce island, bayelsa state, nigeria. To evaluate the antidiabetic activity of ethanolic extract of dioscorea alata in glucose loaded and alloxan induced diabetic rats. Dioscorea alata in the germplasm resources information network grin, u.
Characterization of the dioscorin gene family in dioscorea alata. Production of yam flour project materials uniprojects. Dioscorea alata, an indigenous indonesian food crop, contains a lot of bioactive compounds. Pdf the coppercontaining metalloprotein tyrosinase catalyzes the oxidation of tyrosine in particular ldopa to ldopaquinone that. Pdf potential health benefits of water yam dioscorea. Usda, ars, germplasm resources information network. The objective of this study is to evaluate some nutritional properties of fourteen water yam d. Functional and pasting characteristics of modified water. Chapter one of production of yam flour project material starts from here. A downloadable pdf document of a book in prepublication awaiting illustration. Abstract the project dealt on the production of yam flour from yam chips. In the present study, we assessed the genetic diversity of chinese greater yam by analyzing their morphology, genotype, chromosome and ploidy.
The nutrient and antinutrient components of tubers from seven cultivars ofdioscorea alata were determined. Nigeria is the largest producer of yam in the world, followed. Dioscorea alata is a species of yam that is widely cultivated throughout the world, including china. A comparative assessment of diversity of greater yam. The effect of carbon source of growth medium on amylase production by strains of penicillium solitum and aspergillus rubrum isolated from yam dioscorea alata adekunle odunayo adejuwon1, olusola abiola ladokun2 1department of microbiology, faculty of information technology and applied sciences, lead city, university, ibadan, nigeria. In florida, herbarium records now reported for naturalized populations in 7 counties.
Pdf a reference highdensity genetic map of greater yam. It is closely related to air potato dioscorea bulbifera. Water yam dioscorea alata is a staple crop for many of the poorest in the tropics. The tubers are usually a vivid violetpurple to bright lavender in color hence the common name, but some range in color from cream to plain white. Significant differences in crude protein and starch contents were observed among cultivars. The yams were peeled and washed, 100grams samples coded sample a to g were subjected to two different drying conditions. Dioscorea alata is mainly cultivated for its large white edible flesh roots which have. Download the complete chemical engineering project topic and material chapter 15 titled the production of yam flour here on projects. It is also called the winged yam because its stem is very square. The plant diversity is distributed from the western ghats to eastern ghats, along with the northeastern region and from the greater himalayas to the plain of ganga. Bearth t bb, kappel r, kruger g, pfister r, editor. The project dealt on the production of yam flour from yam chips. Rose umelo, iita editor, who spent time to read through the first draft. Dioscorea alata, also known as greater yam, is one of the major cultivated species.
The species are unique for their medicinal, food and economic values. Pdf invitro propagation of dioscorea alata for tyrosinase. See below for the abstract, table of contents, list of figures, list of tables, list of appendices, list of abbreviations and chapter one. Akaba and matches starches were determined prior to their use as congeals for. Health benefits of yams are recognized to many individuals whove taken advantage of yams in managing blood pressure level among other benefits. The effect of carbon source of growth medium on amylase. Nutritional and antinutritional evaluation of wild yam. Nutritional assessment of yam dioscorea alata tubers. Some of these species are water yam dioscorea alata, white yam d. Unlike other well known plant storage proteins, such as patatin and sporamin, dioscorin is argued.
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. Several species are widely cultivated in many cultivars including dioscorea alata d. Identification of host plant resistance to anthracnose in. It is a perennial climber, but it is grown as an annual. Vigorously twining herbaceous vine, from massive underground tuber. Nevertheless, there is very limited knowledge on this type of yam diversity in china.
Dioscorin is one of the major soluble proteins in yam tubers. Dioscorea species are vegetatively propagated by using. A practical guide to identifying yams university of hawaii. The yam species, dioscorea alata has an advantage for sustainable.
Pdf starches of two water yam dioscorea alata varieties used. Greater yam, water yam, white yam, winged yam synonymy. It has swollen roots or tubers corms, which are formed from the vines, leaves, roots and stolons of the plant. Yam, dioscorea alata is carbohydrate and vitamin b6 rich fruit support for antioxidant, anticancer and antitumor activity. It produces a large root crop of edible subterranean tubers yams which are an important starchy food source in many tropical to subtropical areas around the globe. Water yam or purple yam dioscorea alata is the main food crop of the genus dioscorea. Dioscorea alata ufifas center for aquatic and invasive. This article is about yam a, dioscorea alata a for alata uhlaytuh. Iita bip team sets new production per hectare record for. Water yam dioscorea alata is irregular shape tuber with the outer skin is brown to black in color.
The wide adaptation and cultivation of water yam makes it one of the most important dioscorea species used for food in tropical and subtropical regions tay. This is important in the regions of the tropics, where it is grown for food. Dioscorea alata water yam, purple yam, greater yam, white yam. The impact of cooking on the proximate composition and antinutritional factors of water yam dioscorea alata.
Dioscorea alata cultivars in bayelsa state, nigeria ogidi i. Dioscorea villosa supplement health benefits, dosage. Winged yam is known to have disprupted naturalarea plant communities, particularly coastal hammocks in south florida. Yam is the third most important root and tuber crop in the tropics but few species are grown as health food andor for medicinal purposes. Covered with large leaves, it can quickly grow into the tops of tall trees.
Several species are widely cultivated in many cultivars including dioscorea alata, d. Dioscorea alata c ommonly called as yam, originated from india. Escambia, gadsden, leon, levy, charlotte, lee, and dade wunderlin et al. It is also called as ube in philippines where it is consumed as a delicious and delightful sweet jam. To ascertain the potential health benefits and alternate usage of the species, 20 varieties of dioscorea alata water yam were investigated for their total dietary fiber tdf, dry matter and.
Pdf the physicochemical properties of water yam dioscorea alata var. A practical guide to identifying yams the main species of dioscorea in the pacific islands crops. Dioscorea to which yam belongs encompasses about 600 species. Dioscorea alata, also known as purple yam, ube, or greater yam, among many other names, is a species of yam a tuber.
Potential health benefits of water yam dioscorea alata. These are perennial herbaceous vines cultivated for the consumption of their starchy tubers in africa, asia, latin america, the caribbean and oceania. Twelve species of dioscorea are reported in odisha of which all except dioscorea alata are wild while the latter is a cultivated one. Paper open access the antioxidant activity and plant. In addition, this yams tuber can be processed into flour using such kind of method to expand its utilization, make more affordable and extend the shelf life. Water yams dioscorea alata lam were also purchased from the aforementioned markets isolation of microorganisms from infected white ya m infested or rotten tubers of yam dioscorea rotundata poir were rinsed in sterile distilled water. Oladele department of plant biology, university of ilorin, 234031 ilorin, nigeria abstract dioscorea alata l.
Dioscorea alata water yam, winged yam, uvi fiji, ufi tau. We present these results in conjunction with evaluation completed with either the status assessment, itp, or the legal status of the species in florida. A dioecious species, both male and female plants need to be grown if seed is required. Stems to 10 m 30 ft or more in length, freely branching above. Dioscorea alata, popularly known as white, water or winged yam, is a tuberous root vegetable which belongs to the genus of dioscorea. Review of empirical and emerging breeding methods and tools for. Usually water yam is processed before consumed by steaming, boiling, frying, or roasting. Control of white yam dioscorea rotundata rot pathogen. Dietary pes plant estrogens of dioscorea can provide wide range of health benefits including protection. Dioscorea alata plant finder missouri botanical garden.
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