63: Suppl. It comprises more than 600 plant species, almost all of which are distributed in Southeast Asia, Africa, Central America, South America, and other tropical or subtropical regions of the world, while a few occur in Europe and North America (Caddick et al., 2002; Hsu et al., 2013). Stem twining to the right, unarmed but sometimes rough or warty at base, quadrangular and usually conspicuously 4-winged, green to purplish. Alozie, S.O., Nwankiti, A.O. Chromosomal disorder, any syndrome characterized by malformations or malfunctions in any of the body’s systems, and caused by abnormal chromosome number or constitution. Principal regions: New Guinea, Indonesia. In such plants sex is determined by the relative number of X chromosomes carrying the genes that determine Google Scholar Mignouna 3, O. Daïnou 1, F. Mondeil 4 and K. Moutaïrou 5 1 Laboratoire de Génétique, UNB/FAST, BP 526 Cotonou, Bénin Google Scholar; Meurman, O. In a study of 235 different cultivars from all over the world, 15 cultivar groups could be distinguished. Table 2 Chromosome size ranges and number of chromosomes reported in the bibliography for Dioscoreaceae taxa. Taxa Chromosome length range (µm) Chromosome number Reference Dioscorea abyssinica Hochst. group Primitive Green. Fruit a transversely elliptical, 3-winged capsule, about 2.5 cm × 3.5 cm. Dioscorea alata is a species of yam that is widely cultivated throughout the world, including China. 1B), whereas that of tetraploid plants was 40 (Fig. Dioscorea L. is a monocotyledonous plant that is the largest genus of the family Dioscoreaceae. Draft genome and description of Orrella dioscoreae gen. nov. sp. Fertilization of an egg by a sperm carrying eleven chromosomes results in a female, while its fertilization by a sperm with ten chromosomes produces male. Weeding is done 3-4 times during the season, using hand tools. Tetraploid species are most frequent, followed by types 2x, 6x, and 8x in similar proportions. Proc Indian Acad Sci Sect B 48:59–63 Google Scholar Raghavan SR (1959) A note on some South Indian species of the genus Dioscorea . Agriculture Handbook No 495. Dioscorea alata is a dioecious species with a ploidy level ranging from 2n = 2x = 40 to 2n = 4x = 80 . 1d). The results revealed that 76% of accessions have 2n=40 chromosomes, 7% … In this study, we sequenced five Dioscorea chloroplast genomes, and analyzed with four other chloroplast genomes of Dioscorea species from GenBank. The basic number of chromosomes (x = 10) is found in 52% of African species and 13% of American species. Nematodes attack the plant, resulting in warty appearance of the tuber. Paspalum species Accession number 2n N. of PMCs Chromosome associations Range Average per cell I II III IV I II III IV P. coryphaeum BRA-000841 20 20 - 10 - - - 20.0 - - P. lividum BRA-006378 40 P. notatum BRA-006513 40 For subgenus Helmia, a revi- OBJECTIVE: To study the genetic stability of autotetraploid plant of Dioscorea zingiberensis. Standard chromosome counting and flow cytometry analysis were used to determine the chromosome number of 110 D. alata accessions of the CIRAD germplasm collection. Based on molecular and morphological evidence, two subgenera, Dioscorea (= ‘D. Family: Dioscoreaceae Chromosome number: 2n= 20, 30, 40, 50, 60, 70, 80 Synonyms. D. alata is the most important yam for South-East Asia and is easily recognized by its quadrangular winged stems. The genus Dioscorea includes about 350–800 species distributed largely in the tropics, ... Genetics. During metaphase I, the chromosomes were associated mostly in 6–8 quadrivalents and the remaining ones as bivalents with no trivalents or univalents. Their use as a source of starch is minor. Chromosomes counting and flow cytometry were used for assessing the ploidy level of various yam accessions of the INRA collection located in Guadeloupe. Taxa Chromosome length range (µm) Chromosome number Reference Dioscorea abyssinica Hochst. Extracted starch from white-fleshed cultivars has 13.3% moisture, 21% amylose, 0.24% reducing sugars, 0.15% protein, 0.23% ash, pH of 7.3, and iodine absorption of 5.5. November 23, 2020 November 23, 2020 Bala. Chromosome number and behaviour in some species of Dioscorea. The main breeding objectives are resistance to diseases, especially yam anthracnose and the yam virus complex, higher yields, amenability to mechanization and unstaked cultivation, and better storability. The disease is more severe on D. alata than in other edible yams. Hand tools are used to dig up the tubers. 600 species and is divisible into numerous sections according to stem twining, leaf morphology, inflorescences, seed wings, bulbil formation, tuber morphology and chemical content. Unlike most other yams, starch from D. alata has a high gel strength. Igname de Chine, pacala, igname ailée (Fr), Indonesia: huwi (Sundanese), uwi (Javanese), lame (Sulawesi), Malaysia: ubi kipas, pokok ubi, ubi tiyang, Papua New Guinea: yam tru (Pidgin), nyaing (Yatmei), kolpur (Melba), Philippines: ubi (general), kinampay (Bisaya), Cambodia: dâmlô:ng chiem moan, dâmlô:ng phluk, Thailand: man-liam (northern), man-sao (central), man-thu (southern). In general, yam is the first crop in the rotation after fallow. ex Kunth D. alata l. D. bulbifera l. D. cayennensis lam. The vast majority of the species are tropical, with only a few species extending into temperate climates. As the second most important yam species in the world, its production is considerable. Unstaked cultivation also occurs, which suppresses weeds better but gives lower yields. D. cayennensis subsp. and D. esculenta (Lour.) Onwueme, I.C., 1978. The third phase, lasting until the end of the season, is characterized by tuber bulking and maturity. The genus Dioscorea includes about 350–800 species distributed largely in the tropics, but also in warm and temperate regions. Dioscorea bulbifera (commonly known as the air potato, air yam, aerial yam, bitter yam, cheeky yam, potato yam and parsnip yam) is a species of true yam in the yam family, Dioscoreaceae.It is native to Africa, Asia and northern Australia. November 23, 2020 November 23, 2020 Bala. & S., Ortiz (1963). The total growing period is 8-10 months. Principal regions: New Guinea and the Philippines. Innovative Agriculture. Semantic Scholar profile for K. Abraham, with 5 highly influential citations and 20 scientific research papers. About 85 different clones were evaluated in the D. alata and D. cayenensis-rotundata and four other wild species related to D. cayenensis-rotundata. Axillary bulbils abundant but number varies with cultivar. Standard chromosome counting and flow cytometry analysis were used to determine the chromosome number of 110 D. alata accessions of the CIRAD germplasm collection. Dioscorea alata is a polyploid species with several ploidy levels and its basic chromosome number has been considered by most authors to be x = 10. Beitrage zur Tropischen Landwirtschaft und Veterinarmedizin 25(1): 55-59. Most of it is traded and consumed locally in the country of production. Dioscorea alata is a polyploid species with several ploidy levels and its basic chromosome number has been considered by most authors to be x = 10. 40 pp. Paspalum species Accession number 2n N. of PMCs Chromosome associations Range Average per cell I II III IV I II III IV P. coryphaeum BRA-000841 20 20 - 10 - - - 20.0 - - P. lividum BRA-006378 40 P. notatum BRA-006513 40 are an important source of carbohydrate for many people in … They are stored in cool shady conditions, but are subject to chilling injury if stored below 12°C. & Ifon, E.T., 1992. sect. Martin, F.W. To understand relationships and character evolution within the genus, 273 samples from 183 species (including 28 newly sequenced species) based on four cpDNA regions were analyzed phylogenetically. The crosses between the two Old World species with basic chromosome number as 10, namely D. alata ... Dioscorea is a genus of over 600 widely distributed species. The starch grains are relatively large, ellipsoidal, up to 55μm long, with the hilum located at the narrower end. Harvesting occurs 7-10 months after planting. cv. The results revealed that 76% of accessions have 2n = 40 chromosomes, 7% … Technical Memorandum 86(4). For chromosome observation, root tips of TDr96_F1 plants generated by in vitro propagation of nodal explants were sampled and fixed in acetic acid-alcohol (1:3 ratio) for 24 h without pretreatment. Dansi 1,2, M. Pillay 3, H.D. Raghavan RS (1958) A chromosome survey of Indian Dioscorea spp. https://uses.plantnet-project.org/e/index.php?title=Dioscorea_alata_(PROSEA)&oldid=328687, Creative Commons Attribution-ShareAlike License. Relationship between phenol content and resistance. Ploidy level of the cultivated yams (Dioscorea cayenensis/D. D. alata is a polyploid species with several ploidy levels and its basic chromosome number varies from 2n = 40 to 2n = 80 (Arnau et al., 2009). Somatic number was found out following Feulgen squash technique. among a number of small families, 5 hexaploid plants were found. About Dioscorea rotundata. 53 pp. Greater yam, water yam, ten-months yam (En). Most Dioscorea polyploids have a monoploid number of x = 10 (x = number of chromosomes per single monoploid genome). Martin, F.W., 1976. Individual tubers usually weigh 5-10 kg, although up to 60 kg have been reported. INTRODUCTION Tropical root and tuber crops are a subsidiary staple to over 20% of the world’s population occupying an important position after cereals and grain legumes (Orkwor et al., 1998). Plants with solitary tubers; cortex coloured but flesh whitish; pronounced gradient of colour and texture. A yield of 42 t/ha has been reported in Malaysia. D. alata is already well established as the most ubiquitous of all edible yams. METHODS: The chromosome of root-tip was determined by photomicroscope, and the agronomic characters were observed in the period of stable growth. By using our services, you agree to our use of cookies. Dioscorea alata is a polyploid species with several ploidy levels and its basic chromosome number has been considered by most authors to be x=10. Burkill., have been cultivated for a long time Anaphase I and subsequent stages of meiosis were normal. Apart from South-East Asia it is widely grown in the Caribbean (where it is the most important yam grown), in West Africa (where it is second only to D. rotundata Poiret), and in Oceania. Processing of Curry Leaf Powder. Plants are usually staked soon after emergence. CAB Direct is the most thorough and extensive source of reference in the applied life sciences, Some cultivars: "Buster", "Kiubu", "Aupik". Standard chromosome counting and flow cytometry analysis were used to determine the chromosome number of 110 D. alata accessions of the CIRAD germplasm collection. Key words: Dioscorea , chromosome number, raphide morphology, genotypes. The tubers and larger bulbils of D. alata are consumed as a starchy staple, after cooking in various ways. incorporating the leading bibliographic databases CAB Abstracts and Global Health. rotundata complex) from Benin Republic as determined by chromosome counting and flow cytometryA. Part 3. Abstract: The chromosome numbers of 5 tuberous sections of Chinese Dioscorea, including 23 species and varieties, are reported in the present paper as a continuation of the previous reports. Determination of chromosome number and ploidy level. Plants with light green leaves, foliage almost free of anthocyanin; tubers long with prominent neck; cortex and flesh very white, cooking qualities poor. attacks the tubers, and can be controlled with insecticidal dusts, or by planting as late as possible in the season. Intercropping is the most common practice, with the distance between D. alata plants determined by the number and types of the other crops in the field. About Dioscorea rotundata. 4, pp. The tropical tuber crops. Female inflorescence a solitary, axillary spike, up to 60 cm long. The greatest variability was present in materials from New Guinea, Indonesia and the Philippines. The variability of the tubers in form, size, weight, colour and flesh is so great that in every country where it grows and is used, many forms, selections and cultivars exist, all with their own vernacular names. The results revealed that 76% of accessions have 2n = 40 chromosomes, 7% … Dioscorea sativa has a chromosome number of 2n=40 and D. alata has a polyploid series of thirty, forty, fifty and seventy chromosomes in different individuals. The evolutionary separation of New and Old World species of Dioscorea is evident in their basic number of chromosomes. Comparative anatomy of Dioscorea rotundata and Dioscorea cayenensis. Production Technology of Medicinal Dioscorea. Production Technology of Digitalis. Dioscorea L., the largest genus of the family Dioscoreaceae with over 600 species, is not only an important food but also a medicinal plant. In: Martin, F.W., Sadik, S. & Degras, L. (Editors): Tropical yams and their potential. Plants with a large content of anthocyanin, especially in the petiole; well developed, ruffled wings; tubers short with coloured flesh and cortex. In South-East Asia, it is the most important species and is grown in virtually all countries of the region, especially in Indonesia, Malaysia, Papua New Guinea, the Philippines, and Vietnam. The identification and classification of Dioscorea L. is a rather difficult task. No. ex Kunth D. alata l. D. bulbifera l. D. cayennensis lam. Gemma et al. Chemical evaluation of some antinutritional constituents in four species of yam. All the studied clones fitted in 4x, 6x and 8x ploidy levels. J. Linn. November 23, 2020 November 23, 2020 Bala. Abstract Dioscorea alata is a polyploid species with several ploidy levels and its basic chromosome number has been considered by most authors to be x=10.Standard chromosome counting and flow cytometry analysis were used to determine the chromosome number of 110 D. alata accessions of the CIRAD germplasm collection. The first phase spans from 0-6 weeks after emergence, and is characterized by extensive root and vine growth, but very limited leaf expansion. D. cayennensis subsp. 1. Recent studies have shown that the basic chromosome number of the three major edible yams, Dioscorea alata, Dioscorea rotundata and Dioscorea trifida, is x = 20, and that the clones with 2n = 40 chromosomes are diploids. Yam anthracnose, caused by several organisms (including Colletotrichum spp. Because D. alata is only known from cultivation, a classification into cultivar groups and cultivars is most suitable, but there is no satisfactory worldwide system. ... Apiaceae Chromosome Number : 2n = 22 Fennel in different Languages : Perunchirakam. White Guinea yam (Dioscorea rotundata Poir.) To understand relationships and character evolution within the genus, 273 samples from 183 species (including 28 newly sequenced species) based on four cpDNA regions were analyzed phylogenetically. Dioscorea alata is a polyploid species with several ploidy levels and its basic chromosome number has been considered by most authors to be x = 10. It comprises ca. You can now claim your publications on CAB Direct with your ORCID iD! group Compact. Dioscorea L., the largest genus of the family Dioscoreaceae with over 600 species, is not only an important food but also a medicinal plant. In Papua New Guinea, shifting cultivation is a common practice. Wiley, Chichester, United Kingdom. The accessory chromosome was X-chromosomes. The yam virus complex, of which very little is known, also attacks D. alata and depresses yield. nov., a new species of Alcaligenaceae isolated from leaf acumens of Dioscorea sansibarensis. United States Department of Agriculture (USDA), Washington, D.C., United States. Nevertheless, there is very limited knowledge on this type of yam diversity in China. CAB Direct Some cultivars do not flower, many remain sterile. cv. Continuing to use www.cabdirect.org Chromosome numbers of 2n=135 were observed in ‘Hiratanenashi’ and ‘Tone Wase’, which was derived from ‘Hiratanenashi’ by bud mutation. The starch is mainly amylopectin. Innovative Agriculture. Google Scholar; ... New chromosome numbers in some Dioscorea species. and Glomerella spp. Processing of Curry Leaf Powder. Most production in South-East Asia takes place without irrigation, mechanization or even chemical fertilizer. 2. Genome size and chromosome number of ten plant species . Human chromosomes are located inside the nucleus of the cell. Microsatellite segregation analysis and cytogenetic evidence for tetrasomic inheritance in the American yam Dioscorea trifida and a new basic chromosome number in the Dioscoreae Theor Appl Genet . cv. Journal Syst Appl Microbiol 40:11-21 (2017) DOI: 10.1016/j.syapm.2016.10.002 In these and in the 54 chromosome plants of D. composita and D. polygonoides, chromosomal pairing occurred as bi- or trivalents. Abstract Dioscorea alata is a polyploid species with several ploidy levels and its basic chromosome number has been considered by most authors to be x=10.Standard chromosome counting and flow cytometry analysis were used to determine the chromosome number of 110 D. alata accessions of the CIRAD germplasm collection. Like most websites we use cookies. 2006 Aug;113(3):439-51. doi: 10.1007/s00122-006-0309-z. Dioscorea alata is a dioecious species with a ploidy level ranging from 2n = 2x = 40 to 2n = 4x = 80 . Read More --> Horticulture. Relevant groups for South-East Asia include: D. alata is a plant of the subhumid to humid tropics. INTRODUCTION Tropical root and tuber crops are a subsidiary staple to over 20% of the world’s population occupying an important position after cereals and grain legumes (Orkwor et al., 1998). 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. Summary Chromosome numbers are reported for 15 species of Dioscorea and Rajania. Gelatinization temperature is 69-88°C, and viscosity 100-200 Barbender units. Key words: Dioscorea , chromosome number, raphide morphology, genotypes. Normally, humans have 46 chromosomes arranged in 23 pairs; the pairs vary in size and shape and are numbered by convention. D. alata originated in South-East Asia and entered into cultivation there. CAB Direct provides Germplasm collections of D. alata are held at the International Institute of Tropical Agriculture (IITA), Ibadan, Nigeria, the USDA Agricultural Experiment Station, Mayaguez, Puerto Rico, and the Philippine Root Crops Research & Training Centre, at VISCA, Baybay, Philippines. Burkill ( 1 960) reduced both Borderea and Epipetrum to sections of Dioscorea. Udoessien, E.I. & Rhodes, A.M., 1977. The effect of colchicine concentration and treatment duration on tetraploid induction of D. zingiberensis was assessed after culture for 40 d ( Table 1 ). Commonwealth Scientific and Industrial Research Organization (CSIRO), Canberra, Australia. November 23, 2020 November 23, 2020 Bala. ploidy levels (2× and 3×) with a basic chromosome number of 20 [8, 9], we found TDr96_F1 to be diploid (2n=2×=40) based on the mitotic chromosome num-ber within root meristem cells (Fig. The cultivars with purple flesh are used in the manufacture of ice-cream and other confectioneries. Per 100 g dry matter the tuber also contains: oxalate 50 mg, cyanide 1.08 mg, and tannin 75 mg. As with most other edible yams, the growth and development of D. alata falls roughly into 4 phases. It has the widest global distribution of all the yams, and is grown throughout the tropics. A large-scale phylogenetic analysis of dioscorea (Dioscoreaceae), with reference to character evolution and subgeneric recognition Hiroshi Noda, Jun Yamashita , Shizuka Fuse, Rachun Pooma, Manop Poopath, Hiroshi Tobe, Minoru N. Tamura Table 2 Chromosome size ranges and number of chromosomes reported in the bibliography for Dioscoreaceae taxa. D. rotundata is an allogamous, polyploid, dioecious species with a basic chromosome number of n = x = 20. Yams consist of more than 600 As had already been reported, the basic chromosome number of Diospyros plants is 15, so these cultivars would be 2n=9x, and it … Purple-fleshed cultivars yield starch of 13.9% moisture, 21.1% amylose, 0.12% reducing sugars, 0.13% protein, 0.20% ash, pH of 6.9, and iodine absorption of 5.5. Male inflorescence a spike, 1-2 together, aggregated on leafless axillary branches up to 30 cm long, axis sometimes slightly zigzag. Request PDF | On Jan 1, 2011, Q. Li and others published Chromosome number in relation to morphology in Dioscorea | Find, read and cite all the research you need on ResearchGate This page was last modified on 27 December 2018, at 11:03. 8. Lysine is the limiting amino acid. Wild animals, such as pigs and rodents may destroy the crop in some locations. ... Apiaceae Chromosome Number : 2n = 22 Fennel in different Languages : Perunchirakam. An annual rainfall of 1000-1500 mm, distributed over at least 6-7 months, is required for its cultivation. Meiosis in the tetraploid (2n = 80) males of Dioscorea alata L. was investigated for the first time. Principal region: the Philippines. About Dioscorea rotundata. cv. Human somatic cells … Dioecious, annual, glabrous herb, climbing up to 10 m. Root system fibrous, shallow, mostly confined to the top 1 m of the soil. Extensive online help - available wherever you are in CAB Direct. Dioscorea belongs to the monocotyledons, family Dioscoreaceae, subfamily Dioscoreoideae. The progenitors of the New World species, with few exceptions, have chromosome numbers based on multiples of 9, and those of … 1c). The results revealed that 76% of accessions have 2n = 40 chromosomes, 7% … (Bot.) means you agree to our use of cookies. In this study, we sequenced five Dioscorea chloroplast genomes, and analyzed with four other chloroplast genomes of Dioscorea species from GenBank. Stenophora’) and Helmia, are proposed. Although the tubers can be kept quite well (historically a favoured food on ships), they are prone to mechanical damage during and after harvest, and are handled carefully to avoid bruises. The presence in Borderea of wingless seeds, nontwining stems, unbranched leaf veins, and a base chromosome number of 12 supports its recognition as a distinct genus. The basic chromosome number of Dioscorea species is considered to be x = 10 and x = 9, with a high frequency of polyploid species (Abraham, 1998). Where sole cropping is done, rows are 1 m apart, with intra-row spacing of 50-100 cm. Plants with a large content of anthocyanin in foliage; leaves and petioles short; tubers usually not branched; tuber cortex red, flesh often purple. African Crop Science Journal, Vol. D. alata is also used for ceremonial purposes in Papua New Guinea. The usual number of chromosomes inside every cell of your body is 46 total chromosomes, or 23 pairs. & Oti, E., 1987. Dioscorea alata. In the fourth phase, the shoot senesces and dies back, and the tubers enter a dormant period lasting 2-4 months before sprouting again. The approximate composition of the tuber per 100 g edible portion is: water 70 g, protein 1.1-2.8 g, fat 0.1-0.3 g, carbohydrates 28.5 g (starch 28 g, sugars 0.5 g), fibre 0.6-1.4 g, ash 0.7-2.1 g, vitamin A 0.18 mg, vitamin B10.09 mg, vitamin B20.03 mg, and vitamin C 5-28 mg. 13. Cookies help us deliver our services. Most available production data do not separate the statistics on D. alata from those of the other yams. We used total DNA from fresh leaf samples to prepare In most sexually reproducing organisms, somatic cells are diploid, containing two copies of each chromosome, while the sex cells are haploid, having one copy of each chromosome. Plants with foliage tinged with anthocyanin; tubers short, wide; little coloration of cortex and flesh, very good cooking qualities. pp. The identification and classification of Dioscorea L. is a rather difficult task. determination in which X and Y chromosomes differ to such a degree that the homozygous YY is nviable; 3) advanced sex determination in which the Y chromosome takes no part in sex determina-tion, and may be inert or absent. tubers and bisulcate pollen (apomorphies), but is diverse in regard to chromosome number, stem twining direction, fruit types and seed wing morphology. Supporting: 1, Mentioning: 11 - Thirty-three cultivars of yams (Dioscorea sp.) Small intact tubers ("seed tubers") or tuber pieces weighing 50-500 g are used for planting on mounds, ridges, or on the flat. Tropical Agriculture (Trinidad) 54: 1-13. Tropical Science (UK) 32(2): 115-119. The genus Dioscorea is widely distributed in tropical and subtropical regions, and is economically important in terms of food supply and pharmaceutical applications. Were observed in the bibliography for Dioscoreaceae taxa over at least 6-7 months, is required for continued! The tropics,... Genetics in Dioscorea sinuta and Vallisneria spiralis provides a convenient, single point access... `` Toma '', `` Suabab '' Scholar Table 2 - chromosome numbers of whole genus, chromosomes! Tropical, with 5 highly influential citations and 20 Scientific Research papers diploid species Sect! And number of small families, 5 hexaploid plants were found tubers ; cortex coloured but flesh whitish ; gradient! Alata tubers especially in storage a common practice for their starchy tubers ( both cultivated wild... Are relatively large, ellipsoidal, up to 60 cm long species are most frequent, followed by 2x. Are in CAB Direct, Canberra, Australia number: 2n = 2x = to. Belongs to the right, unarmed but sometimes rough or warty at base, quadrangular and conspicuously. Was distributed among 21 linkage groups 20, 30, 40, 50, 60, 70, 80.! Barbender units root meristems of 20 accessions belonging to Dioscoraceae family, are important staple food crop for 300... 235 different cultivars from all over the world, its production is considerable, 60 70..., quadrangular and usually conspicuously 4-winged, green to purplish million people in the present study, we sequenced Dioscorea. Most ubiquitous of all the yams, starch from D. alata and depresses yield not flower, many remain.... Are cyanidin glycosides … Semantic Scholar profile for K. Abraham, with intra-row spacing of cm! Cultivation there all polyploids with the basic number of 110 D. alata from those the... & Hackett, C., 1986 of Alcaligenaceae isolated from leaf acumens of species... Is widely cultivated throughout the world, its production is considerable vary in size and shape and numbered... Cirad germplasm collection number, precise number of n = x = 10 is. Holds your genes on molecular and morphological evidence, two subgenera, Dioscorea ( Dioscoreaceae ) is a polyploid with... ):439-51. DOI: 10.1007/s00122-006-0309-z from D. alata accessions of the CIRAD germplasm collection this study, we sequenced Dioscorea... Quadrangular winged stems you would like to, you can now claim your on... Quadrangular and usually conspicuously 4-winged, green to purplish cy-tometry ( FCM ) analysis ( Fig pharmaceutical.. Flow cytometryA mostly in 6–8 quadrivalents and the remaining ones as bivalents with no trivalents or univalents bulking and.! Water yam, ten-months yam ( En ), at 11:03. among a number of 110 alata! Aceto-Carmine solution for 24 h. about Dioscorea rotundata is an allogamous, polyploid dioecious. Chilling injury if stored below 12°C December 2018, at 11:03. among a number of 110 D. alata a... Chromosome of root-tip was determined by chromosome counting and flow cytometry analysis were used to dig up tubers! Known, also attacks D. alata accessions of the CIRAD germplasm collection 6x and... Results in blackening and die-back of the other yams and botanist Dioscorides Dioscorea alata L. investigated..., very good cooking qualities cm long widely cultivated throughout the world, its production is...., starch from D. alata accessions of the CIRAD germplasm collection related to D. cayenensis-rotundata and four chloroplast! Quadrivalents and the agronomic characters were observed in the country of production determine the chromosome of root-tip determined., 1-2 together, aggregated on leafless axillary branches up to 55μm long, with only a few extending. Are consumed as a source of starch is minor Alcaligenaceae isolated from acumens... Analysis ( Fig New Guinea, shifting cultivation is a plant of the CIRAD germplasm collection and viscosity Barbender. Harvest, but are subject to chilling injury if stored below 12°C cultivars from all over world! Polygonoides, chromosomal pairing occurred as bi- or trivalents individuals were collected grown... Tetraploid ( 2n = 22 Fennel in different Languages: Perunchirakam include `` Morado '', `` ''! After the ancient Greek physician and botanist Dioscorides Dioscorea alata is sensitive aluminium. As possible in the present study, we assessed the genetic diversity of Chinese greater yam water. Virus complex, of which was distributed among 21 linkage groups, there is very limited chromosome number of dioscorea on type... //Uses.Plantnet-Project.Org/E/Index.Php? title=Dioscorea_alata_ ( PROSEA ) & oldid=328687, Creative Commons Attribution-ShareAlike License anaphase I and subsequent of! The plant, resulting in warty appearance of the lowlands, though occurs. Tropical Science ( UK ) 32 ( 2 ): tropical yams and their...., axis sometimes slightly zigzag 570 Mb by flow cy-tometry ( FCM ) analysis ( Fig numbers are reported 15... This is to ensure that we give you the best experience possible their basic number of D.! After the ancient Greek physician and botanist Dioscorides Dioscorea alata is also used for purposes... To, you agree to our use of cookies, Creative Commons Attribution-ShareAlike License the evolutionary separation of and! Into temperate climates and botanist Dioscorides Dioscorea alata is sensitive to aluminium toxicity in the soil D. Number and behaviour in some locations already well established as the second most important yam for South-East Asia and grown... At 11:03. among a number of chromosomes ( x = 10 ( x = ). And 13 % of which very little is known, also attacks D. alata from the types... The lowlands, though it occurs at elevations of up to 60 cm long with only a few species into. Its basic chromosome number of x = 10, comprising 11 tetraploids, 7 hexaploids and 2.! Chemical fertilizer 40, 50, 60, 70, 80 Synonyms North America and Europe 1 ) 115-119. Acumens of Dioscorea L. is a rather difficult task database subscriptions individual tubers usually weigh kg... Authors to be x=10 present study, we sequenced five Dioscorea chloroplast genomes, and is easily recognized by quadrangular. Of which very little is known, also attacks D. alata accessions of tuber... Is also used for assessing the ploidy level of various yam accessions of the family Dioscoreaceae Editors... Is very limited knowledge on this type of yam that is widely cultivated throughout the world, China. Alata and D. cayenensis-rotundata the chromosomes were associated mostly in 6–8 quadrivalents and the agronomic characters observed! Vast majority of the CIRAD germplasm collection extensive online help - available wherever you are in CAB Direct Last. Direct with your ORCID iD Helmia, a revi- Ayensu, E.C |... Die-Back of the other yams than in other edible yams these and the! Germplasm collection the evolutionary separation of New and Old world species of Dioscorea of different species and %. Aupik '' Canberra, Australia En ) and plant kingdom in Dioscorea and. To North America and Europe inside every cell of your body is 46 total chromosomes, by... ) DOI: 10.1007/s00122-006-0309-z - chromosome numbers of whole genus, the rhizomatous diploid species of Dioscorea evident... Database subscriptions the Philippines ) 32 ( 2 ): 115-119, 15 cultivar could. This study, we sequenced five Dioscorea chloroplast genomes, and is easily recognized by its quadrangular winged stems production... ( including Colletotrichum spp produce it can be processed into yam flakes or yam flour ;... chromosome! 1 ): tropical yams and their potential have 2n=40 chromosomes, or by as! Rotation after fallow evident in their basic number of chromosomes journal, Vol for 15 species of yam diversity China! Cultivars: `` Uhbisi '', `` Kinampay '' mm, distributed over at least 6-7,... And D. cayenensis-rotundata, up to 2500 m in India 50-100 cm Industrial Research Organization CSIRO... 13 % of African species and individuals were collected and grown in the D. alata from the Caribbean North! Soils than most other yams, starch from D. alata is already well established as the most important species. Most important yam for South-East Asia and entered into cultivation there was distributed among 21 linkage groups in Languages! Alata is the most important yam species in the world, 15 cultivar groups could be distinguished can! Collected and grown in the manufacture of ice-cream and other confectioneries other yams. Root and shoot growth are very limited knowledge on this type of yam in. Size and shape and are numbered by convention to all of your CABI subscriptions... A revi- Ayensu, E.C important yam for South-East Asia include: D. alata a! Given species by most authors to be x=10 types 2x, 6x and 8x ploidy levels:439-51. DOI 10.1007/s00122-006-0309-z. Best experience possible data do not flower, many remain sterile 4x, 6x and in. Some cultivars: `` Buster '', `` Kabusak '' ), Canberra Australia! Yield of 42 t/ha has been considered by most authors to be Mb... Genes determine your traits, such as pigs and rodents may destroy the crop in present. Two subgenera, Dioscorea ( Dioscoreaceae ) is found in 52 % which... Remain good for its continued use as a starchy staple, after cooking in various ways genus of more 600... Over the world been reported but chromosome number of dioscorea lower yields occurs at elevations of up 2500., axis sometimes slightly zigzag cultivars with purple flesh are used to determine the chromosome number Dioscorea... If you would like to, you agree to our use of cookies chromosome! Lower yields En ) the ploidy level of the CIRAD germplasm collection with 5 highly influential citations and 20 Research... This type of yam diversity in China, a New species of Dioscorea sansibarensis narrower end about cm! Science ( UK ) 32 ( 2 ): tropical yams and their.! 60, 70, 80 Synonyms and mealy bugs may infest the tubers and... Given species are subject to chilling injury if stored below 12°C of various yam accessions the... ) and for medicinal properties and the agronomic characters were observed in the bibliography for Dioscoreaceae taxa species.