Micropropagation of white yam dioscorea rotundata poir. Breeding of this dioecious species is hampered by its erratic flowering, yet little is currently known on the genetic determinism of its sexual reproduction. First report of meloidogyne enterolobii causing tuber. This article explains what pdfs are, how to open one, all the different ways. An oversized pdf file can be hard to send through email and may not upload onto certain file managers. This will go a long way to improving your project defense preparatory skill. Dioscorea rotundata an overview sciencedirect topics. The board of trustees of the royal botanic gardens, kew.
Dioscorea rotundata white guinea yam, dioscorea alata water yam, dioscorea bulbifera aerial yam, dioscorea esculant chinese yam and dioscorea dumetorum. This paper described the results of farmermanaged demonstration plots established in 2012 and 20 designed to promote the adapted yam minisett. Author oj adeniyi, vo adetimirin, ivan ingelbrecht ugent and r asiedu organization. White or guinea yam dioscorea rotundata, grown for its underground tubers, is an important food in west africa. The nomenclature yam applies to members of the dioscorea genus of the.
Our aim of providing this project research material is to reduce the stress of moving from one school library to another all in the name of searching for isolation and antifungal susceptibilities of phytopathogenic fungi from yam leaves dioscorea rotundata and cayenesis in zaria, nigeria research materials. Amylolytic and betaglucanase activities of yam rot fungi. Introduction of the eight yam species grown in the cameroon, the popular white yam dioscorea rotundata and the sweet yam d dumetorum are the most consumed. Yam traditional pacific island crops research guides. Pdf root distribution patterns of white yam dioscorea rotundata. Apr 28, 2020 a mosaic disease of the yam dioscorea rotundata in puerto rico. Seasonal growth, biomass allocation, and invasive attributes manifested by dioscorea bulbifera l. International institute oftropical agriculture, nairobi, kenya. The fungi were isolated from postharvest yams dioscorea rotundata showing. Twelve carbohydrates glucose, sucrose, fructose, galactose, mannose, lactose, maltose, raffinose, ribose, sorbose, xylose, and starch were screened for the best carbon source for in vitro culture of white guinea yam dioscorea rotundata embryos using linsmaierskoog basal medium supplemented with a vitamin thiamine hydrochloride and. Antifungal susceptibilities of phytopathogenic fungi from. Organic yam dioscorea rotundata organic yams are certified to the highest standards, according to the guideline of certisys belgium according to european and american standards nop usda. This paper described the results of farmermanaged demonstration plots established in 2012 and 20 designed to promote the adapted yam minisett technique aymt in nigeria.
An icon used to represent a menu that can be toggled by interacting with this icon. The adapted yam minisett technique for producing clean seed. Introductionyams belong to the monocotyledonous family dioscoreaceae and genus dioscorea. Chemical composition of essential oil of mondia whitei and.
Impact of osmotic dehydration on the encapsulated apices. If your scanner saves files as pdf portbale document format files, the potential exists to merge the individual files into one doc. Comparative studies on the susceptibility of three tubers. I paid for a pro membership specifically to enable this feature.
They are grown for their tubers or storage organs, which may be subterranean e. For other tuber, root, or bulb crops, the reader is referred to the excellent book by simpson and ogorzaly 1995. Hosted by the usgs core science analytics and synthesis. Nutritional quality of yam dioscorea dumetorum and d. First report of meloidogyne enterolobii causing tuber galling. Read on to find out just how to combine multiple pdf files on macos and windows 10. Out of these, dioscorea rotundata white yam anddioscorea alata water yam are the most common species in nigeria izekor and olumese, 2010.
All i get is a blank dark gray window on the new tab that a. Belonging to the monocotyledon the dioscorea genus, under the family dioscoreaceae, there are about 450 known species mainly distributed in tropical and subtropical. Pdf file or convert a pdf file to docx, jpg, or other file format. Chemical composition of essential oil of mondia whitei and antifungal activities against aspergillus flavus and penicillium sp. This is an historical document made available through the national agricultural library digital collections. Contents page preface iii introduction 1 history and origin 3 geographic distribution 3 botany 4 classification 4 morphology 5 cytology 7 varieties 12 culture 15 environmental requirements 15. Depending on the type of scanner you have, you might only be able to scan one page of a document at a time. It has the largest global distribution of all the yams, is grown throughout the tropics and is widely grown in the west indies where it is the most important yam grown, in west africa where it is second only to dioscorea rotundata, and in central america. Fabien cormier 1,2 floriane lawac 1,2,3 erick maledon 1,2 marie. Towards sustainable production of new varieties of.
Frontiers agrobacteriummediated genetic transformation of. Abstract in vitro culture media capable of regenerating moderate to high shoots andor plantlets from meristems of two yam species dioscorea rotundata and dioscorea alata within comparable duration of 10 weeks as commonly obtained in other monocots and. For example, the toxic alkaloid dioscorine is present in the edible species d. Journal of biologically active products from nature. It has as many as 600 species out of which six are economically important staple species. It is sometimes treated as separate species from dioscorea cayennensis. Yellow yam dioscorea dumetorum kunth pax bitter yam dioscorea esculenta lour.
Luckily, there are lots of free and paid tools that can compress a pdf file in just a few easy steps. Kokoro is one of its most important cultivars it is sometimes treated as separate species from dioscorea cayennensis its wild progenitor is dioscorea praehensilis. 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. White yam dioscorea rotundata is a major root crop grown throughout west africa but one of the major factors that limits its production is the availability of good quality planting material. Yam traditional pacific island crops research guides at. Biotechnological potential of endophytic bacteria of. However, it is not a legal authority for statutory or regulatory purposes. Dioscorea alata, dioscorea cayanensis, dioscorea rotundata, dry rot, susceptibility, phytochemical. Belonging to the monocotyledon the dioscorea genus, under the family dioscoreaceae, there are about 450 known. This is a well researched and comprehensive project material that we are offering at an affordable rate of n3,000 for nigerian clients and. Dioscorea rotundata and dioscorea cayennensis both known as guinea yams are the most popular and economically important yams in west and central africa where they are indigenous, while dioscorea alata referred to as water yam or greater yam is the most widely distributed species globally. Adobe systems is a software manufacturer that has created many document and multimedia editing programs.
The adapted yam minisett technique for producing clean. A pdf portable document format is a widely popular type of document format created by adobe. Dansi a, mignouna hd, zoundjihekpon j, sangare a, asiedu r, ahoussou n 2000 using isozyme polymorphism to assess genetic variation within cultivated yams dioscorea cayenensis dioscorea rotundata complex of the republic of benin. Download acrobat pdf file 175kb online appendix a6. The species is easily dis tinguished from related species such as d. Searching for a specific type of document on the internet is sometimes like looking for a needle in a haystack. Guinea yams have been in cultivation in west africa. The vast majority of the species are tropical, with only a few species extending into temperate climates. In this context, this research aimed to isolate and characterize endophytic bacteria from bamboo guadua sp. Frontiers genomewide identification and evolutionary.
The genus contains about 600 species with more than 10 species cultivated for food and for pharmaceutical purposes coursey, 1976. Assessment of microbial changes and nutritional qualities of. Genetic control of flowering in greater yam dioscorea alata. Processing of yam paste amala a product of fermented yam dioscorea rotundata flour. While every effort has been made to provide the most reliable and uptodate information available, ultimate legal requirements with respect to species are contained in.
The mean life spans of the female insect that is from hatch to death on dioscorea rotundata var. The dioscorea genus yaman appraisal of nutritional and. Comparative studies on the susceptibility of three tubers of. The presence of anomocytic, anisocytic and paracytic stomata may be used as a distinguishing feature for the identification and separation of d. Flourthe average composition of the flour extracted from the tubers was given as. The study comprised 125 phytohormone combinations investigated in three factorial experiments each. Here we used a genomewide association approach and identified a major genetic barrier to reproduction in yam on. Dioscorea alata has had to com pete with native species of yams in west africa, where it has be come a second or third best yam. Participatory evaluation of guinea yam dioscorea cayenensis lam. Instructables is experiencing technical difficulties.
Progress in yam breeding is constrained by variable flowering behaviour, making hybridization difficult. Oil was obtained by hydrodistillation and gas chromatography was used to analyze their chemical constituents. Were terribly sorry about this and were doing our best to fix it. Dioscorea trifida belongs to the small section macrogynodium, a south and central american section. In vitro culture media capable of regenerating moderate to high shoots andor plantlets from meristems of two yam species dioscorea rotundata and dioscorea alata within comparable duration of 10 weeks as commonly obtained in other monocots and root and tuber crops were investigated. Isolation and antifungal susceptibilities of phytopathogenic fungi from yam leaves dioscorea rotundata and cayenesis in zaria, nigeria. Flowering intensity in white yam dioscorea rotundata the. Endophytic microorganisms have a wide genetic diversity, being very useful for agriculture, for producing growth regulators and making nutrients available to plants. For this, the macromorphological characteristics of bacterial colonies were studied. The indications, therefore, are that the present yields obtained by. Kolombia, adjiguita yao, p lava kumar, ao claudiuscole, gerrit karssen, nicole viaene, d coyne, and wim bert. Dioscorea rotundata white guinea yam, dioscorea alata water yam, dioscorea bulbifera aerial yam, dioscorea esculant chinese yam and dioscorea dumetorum trifoliate yam. Result here we used a genomewide association approach and identified a major genetic barrier to reproduction. The rat diets casein control and protein free diet were formulatedaccording to method of lape 17 and fasuyi.
The mean life spans of the female insect that is from hatch to death on dioscorea rotundatavar. In safari, when i click download pdf on somebodys instructable, it first looks like its going to download, but nothing really happens. Pdf phases of dormancy in yam tubers dioscorea rotundata. This handbook covers botany, varieties, various aspects of cultivation, harvest and postharvest information, preparation, and composition for dioscorea rotundata and d. A reference highdensity genetic map of greater yam. By michelle rae uy 24 january 2020 knowing how to combine pdf files isnt reserved.
Isolation and antifungal susceptibilities of phytopathogenic. A pdf file is a portable document format file, developed by adobe systems. Pdf is a hugely popular format for documents simply because it is independent of the hardware or application used to create that file. Shoot and plantlet regeneration from meristems of dioscorea. L1 activated charcoal prior to encapsulation in alginate 3% beads with calcium chloride 1. Then, the apices were exposed to osmotic dehydration with two. Specie dioscorea rotundata is particularly susceptible to the virus yam mosaic virus ymv. Dioscorea dumetorum, d rotundutu, yam flours, diet, rat, nutritional evaluation, nitrogen, digestible carbohydrate, fibre, minerals. Pdf tuberisation was obtained in vitro on yam dioscorea. Pdf the productivity of white yam dioscorea rotundata poir must increase to sustainably meet the. Since a couple days i cannot download pdfs anymore. Biotechnological potential of endophytic bacteria of bamboo. Assessment of microbial changes and nutritional qualities. It is named by the monk charles plumier after the ancient greek physician and botanist dioscorides.
Itis taxonomy is based on the latest scientific consensus available, and is provided as a general reference source for interested parties. Dioscorea rotundata is an important food crop that is mainly cultivated in subtropical regions of the world. This study was conducted in bringakro 6 401n, 5 091w, 150 m alt. Flowering intensity in white yam dioscorea rotundata. Frontiers agrobacteriummediated genetic transformation. We then calculated the recombination fraction rf c count pi 1 2 3 0 100 200 0 200 400 600 800 a b d fig. Department of plant biotechnology and bioinformatics. This means it can be viewed across multiple devices, regardless of the underlying operating system. Genome sequencing of the staple food crop white guinea yam.
Pdf tuber formation and development of dioscorea cayenensis. Towards sustainable production of new varieties of dioscorea. High genetic diversity, distant phylogenetic relationships. Tuber formation and development of dioscorea cayenensis dioscorea rotundata complex in vitro effect of polyamines. Yam popularly called ji in igbo language is a tropical crop belonging to the family dioscoreaceae in the genus dioscorea. Page designed through the cooperative efforts of interagency itis teams. Six treatments were combinations of whole tubers and minisetts and three tubersize classes of 30 59 g, 60 89 g, and 90 120 g referred. Ymv showed the most variable cp relative to eight other potyviruses.
Dioscorea rotundata, agrobacteriummediated transformation, axillary buds, selection marker gene, reporter gene introduction yam dioscorea spp. In southeast asia it is the most important yam species and is grown in virtually all. Dente in the laboratory with ambient temperatures of 26. This high variability was structured into nine distant molecular groups, as revealed by phylogenetic analyses and validated by assessment of the molecular evolutionary. The presence of trichomes in aloshi and nwanyieri can be used to separate the two. Natural pollination by thrips is inefficient, such that populations with higher ratios of male to female plants set more fruits.
58 1613 1190 375 582 1075 1272 1269 1364 607 608 1337 1506 1342 1105 878 991 101 947 1141 1164 1191 264 512 207 122 1185 862