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 Production Technology of Medicinal Dioscorea. This page was last modified on 27 December 2018, at 11:03. Key words: Dioscorea , chromosome number, raphide morphology, genotypes. Plants are usually staked soon after emergence. In general, yam is the first crop in the rotation after fallow. The progenitors of the New World species, with few exceptions, have chromosome numbers based on multiples of 9, and those of … group Compact. By using our services, you agree to our use of cookies. The vast majority of the species are tropical, with only a few species extending into temperate climates. Ploidy level of the cultivated yams (Dioscorea cayenensis/D. Human somatic cells … 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. All the studied clones fitted in 4x, 6x and 8x ploidy levels. It is named by the monk Charles Plumier after the ancient Greek physician and botanist Dioscorides White Guinea yam (Dioscorea rotundata Poir.) In such plants sex is determined by the relative number of X chromosomes carrying the genes that determine It tolerates poorer soils than most other cultivated yams. Dioecious, annual, glabrous herb, climbing up to 10 m. Root system fibrous, shallow, mostly confined to the top 1 m of the soil. Dioscorea alata is a species of yam that is widely cultivated throughout the world, including China. Furthermore, … Determination of chromosome number and ploidy level. Dansi 1,2, M. Pillay 3, H.D. cv. 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. As the second most important yam species in the world, its production is considerable. Dioscorea L., the largest genus of the family Dioscoreaceae with over 600 species, is not only an important food but also a medicinal plant. Phylogenetic analyses with 2381 conserved genes revealed that Dioscorea is a unique lineage of monocotyledons distinct from the Poales (rice), Arecales (palm), and Zingiberales (banana). 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. Onwueme, I.C., 1978. On the basis of analysis of chromosome numbers of whole genus, the rhizomatous diploid species of Sect. In a study of 235 different cultivars from all over the world, 15 cultivar groups could be distinguished. ... Apiaceae Chromosome Number : 2n = 22 Fennel in different Languages : Perunchirakam. They can be processed into yam flakes or yam flour. 355-364. Principal region: New Guinea. Agriculture Handbook No 495. 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. D. esculenta (lour.) & Oti, E., 1987. ... Yams (Dioscorea spp.) Source of resistance in anthracnose blotch disease of water yam (Dioscorea alata) caused by Colletotrichum gloeosporioides Penz. Standard chromosome counting and flow cytometry analysis were used to determine the chromosome number of 110 D. alata accessions of the CIRAD germplasm collection. Standard chromosome counting and flow cytometry analysis were used to determine the chromosome number of 110 D. alata accessions of the CIRAD germplasm collection. Some cultivars: "Buster", "Kiubu", "Aupik". Gemma et al. Cultivars include "Masi", "Lanswa", "Suabab". Hand tools are used to dig up the tubers. Cultivars include "Baron", "Toa", "Goarmago". The third phase, lasting until the end of the season, is characterized by tuber bulking and maturity. Family: Dioscoreaceae Chromosome number: 2n= 20, 30, 40, 50, 60, 70, 80 Synonyms. There are over 13,632,000 records available in CAB Direct | Last updated on December 11, 2020. Google Scholar; ... New chromosome numbers in some Dioscorea species. & Ifon, E.T., 1992. 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. In total, we predicted 26,198 genes. ... Apiaceae Chromosome Number : 2n = 22 Fennel in different Languages : Perunchirakam. Relationship between phenol content and resistance. Intra-specific classification of Dioscorea alata. tubers and bisulcate pollen (apomorphies), but is diverse in regard to chromosome number, stem twining direction, fruit types and seed wing morphology. 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 . The second phase, lasting from 6-12 weeks after emergence, is characterized by limited root growth, extensive shoot and leaf growth, and the onset of tuber formation. About Dioscorea rotundata. During metaphase I, the chromosomes were associated mostly in 6–8 quadrivalents and the remaining ones as bivalents with no trivalents or univalents. METHODS: The chromosome of root-tip was determined by photomicroscope, and the agronomic characters were observed in the period of stable growth. Read More --> Horticulture. 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. This is to ensure that we give you the best experience possible. Dioscorea rotundata is an important food crop that is mainly cultivated in subtropical regions of the world. among a number of small families, 5 hexaploid plants were found. 1c). 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 genus Dioscorea includes about 350–800 species distributed largely in the tropics, ... Genetics. Your genes determine your traits, such as eye color and blood type. D. rotundata is frequently infected by various pathogens during its lifespan, which results in a substantial economic loss in terms of yield and quality. Tropical Science (UK) 32(2): 115-119. 13. Raghavan RS (1958) A chromosome survey of Indian Dioscorea spp. Plants with light green leaves, foliage almost free of anthocyanin; tubers long with prominent neck; cortex and flesh very white, cooking qualities poor. The yam virus complex, of which very little is known, also attacks D. alata and depresses yield. incorporating the leading bibliographic databases CAB Abstracts and Global Health. Soc. Leaves simple, alternate at the very base, thereafter opposite, subsagittately or subhastately ovate, 10-30 cm × 5-20 cm, acuminate, 5-nerved, bright green or sometimes tinged purplish; petiole up to as long as the blade, sometimes marginally frilled, auriculate at base. Anaphase I and subsequent stages of meiosis were normal. J. Linn. 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). 1C). They are mostly grown for their starchy tubers (both cultivated and wild) and for medicinal properties. Burkill ( 1 960) reduced both Borderea and Epipetrum to sections of Dioscorea. 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. Most available production data do not separate the statistics on D. alata from those of the other yams. The chromosome number of the diploid control was 20 (Fig. A chromosome is a structure that holds your genes. Weeding is done 3-4 times during the season, using hand tools. Yams consist of more than 600 Gemma et al. The tropical tuber crops. Phenol content is reportedly higher in resistant cultivars than in susceptible ones. In this study, we sequenced five Dioscorea chloroplast genomes, and analyzed with four other chloroplast genomes of Dioscorea species from GenBank. The accessory chromosome was X-chromosomes. The genus Dioscorea is widely distributed in tropical and subtropical regions, and is economically important in terms of food supply and pharmaceutical applications. The tubers and larger bulbils of D. alata are consumed as a starchy staple, after cooking in various ways. 1. 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. Innovative Agriculture. 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. 1B), whereas that of tetraploid plants was 40 (Fig. 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). Axillary bulbils abundant but number varies with cultivar. ), is a serious disease which results in blackening and die-back of the leaves. November 23, 2020 November 23, 2020 Bala. Nematodes attack the plant, resulting in warty appearance of the tuber. Tuber rots caused by Fusarium spp., Penicillium spp., and Rosellinia spp., all afflict D. alata tubers especially in storage. 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 . sect. Plants with solitary tubers; cortex coloured but flesh whitish; pronounced gradient of colour and texture. The first phase spans from 0-6 weeks after emergence, and is characterized by extensive root and vine growth, but very limited leaf expansion. The results revealed that 76% of accessions have 2n = 40 chromosomes, 7% … Plants with a large content of anthocyanin in foliage; leaves and petioles short; tubers usually not branched; tuber cortex red, flesh often purple. Principal region: the Philippines. Unstaked cultivation also occurs, which suppresses weeds better but gives lower yields. The cultivars with purple flesh are used in the manufacture of ice-cream and other confectioneries. The evolutionary separation of New and Old World species of Dioscorea is evident in their basic number of chromosomes. 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. Tubers usually single, varying in size and shape, often very large; cylindrical or clavate in shape (often found as deep as 1.5 m) or globose, stout and short, pyriform, often variously lobed or fingered and fasciated or curved; skin brown to black; flesh white, cream or purplish (superficially or throughout). CAB Direct is the most thorough and extensive source of reference in the applied life sciences, In Papua New Guinea, shifting cultivation is a common practice. D. alata is already well established as the most ubiquitous of all edible yams. Greater yam, water yam, ten-months yam (En). D. alata is also used for ceremonial purposes in Papua New Guinea. No. Standard chromosome counting and flow cytometry analysis were used to determine the chromosome number of 110 D. alata accessions of the CIRAD germplasm collection. Individual tubers usually weigh 5-10 kg, although up to 60 kg have been reported. Production Technology of Medicinal Dioscorea. Nevertheless, there is very limited knowledge on this type of yam diversity in China. Bulbils of Dioscorea of different species and individuals were collected and grown in the garden. 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. Tetraploid species are most frequent, followed by types 2x, 6x, and 8x in similar proportions. 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. 2. 63: Suppl. Yams consist of more than 600 Stem twining to the right, unarmed but sometimes rough or warty at base, quadrangular and usually conspicuously 4-winged, green to purplish. Draft genome and description of Orrella dioscoreae gen. nov. sp. The observation of quadrivalents in the tetraploids provides cytological evidence … Semantic Scholar profile for K. Abraham, with 5 highly influential citations and 20 scientific research papers. D. alata is the most important yam for South-East Asia and is easily recognized by its quadrangular winged stems. The results revealed that 76% of accessions have 2n=40 chromosomes, … 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 rotundata complex) from Benin Republic as determined by chromosome counting and flow cytometryA. 1: 127–136. 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 Relevant groups for South-East Asia include: D. alata is a plant of the subhumid to humid tropics. ex Kunth D. alata l. D. bulbifera l. D. cayennensis lam. King, G. & Hackett, C., 1986. If you would like to, you can learn more about the cookies we use. Martin, F.W., 1976. The starch is mainly amylopectin. They are all polyploids with the basic number x=10. : 1033 (1753). Small intact tubers ("seed tubers") or tuber pieces weighing 50-500 g are used for planting on mounds, ridges, or on the flat. 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. We estimated the genome size of TDr96_F1 to be 570 Mb by flow cy-tometry (FCM) analysis (Fig. Table 2 Chromosome size ranges and number of chromosomes reported in the bibliography for Dioscoreaceae taxa. All accessions had a basal chromosome number of x = 10, comprising 11 tetraploids, 7 hexaploids and 2 octoploids. (1970). 2. means you agree to our use of cookies. United States Department of Agriculture (USDA), Washington, D.C., United States. & S., Ortiz (1963). Burkill., have been cultivated for a long time Tabular description of crops grown in the tropics. Dioscorea L., the largest genus of the family Dioscoreaceae with over 600 species, is not only an important food but also a medicinal plant. Read More --> Horticulture. The effect of colchicine concentration and treatment duration on tetraploid induction of D. zingiberensis was assessed after culture for 40 d ( Table 1 ). rotundata (Poir.) D. alata is sensitive to aluminium toxicity in the soil. The results revealed that 76% of accessions have 2n=40 chromosomes, 7% … 40 pp. Chromosome counts were made in root meristems of 20 accessions belonging to 15 morphological types. The genus Dioscorea includes about 350–800 species distributed largely in the tropics, but also in warm and temperate regions. 4, pp. Mignouna 3, O. Daïnou 1, F. Mondeil 4 and K. Moutaïrou 5 1 Laboratoire de Génétique, UNB/FAST, BP 526 Cotonou, Bénin Chromosomal disorder, any syndrome characterized by malformations or malfunctions in any of the body’s systems, and caused by abnormal chromosome number or constitution. The total growing period is 8-10 months. Their use as a source of starch is minor. Dioscorea belongs to the monocotyledons, family Dioscoreaceae, subfamily Dioscoreoideae. Cultivars include "Morado", "Vino Violeta", "Kinampay". and Glomerella spp. Wild animals, such as pigs and rodents may destroy the crop in some locations. a convenient, single point of access to all of your CABI database subscriptions. Introdution. Standard chromosome counting and flow cytometry analysis were used to determine the chromosome number of 110 D. alata accessions of the CIRAD germplasm collection. Google Scholar; Meurman, O. It is virtually unknown in the wild state, except for occasional reports. Some cultivars: "Uhbisi", "Toma", "Kabusak". Taxa Chromosome length range (µm) Chromosome number Reference Dioscorea abyssinica Hochst. Chromosomes counting and flow cytometry were used for assessing the ploidy level of various yam accessions of the INRA collection located in Guadeloupe. Species in this genus are dioecious, ... 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). Principal regions: New Guinea, Indonesia. Commonwealth Scientific and Industrial Research Organization (CSIRO), Canberra, Australia. 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). CAB Direct OBJECTIVE: To study the genetic stability of autotetraploid plant of Dioscorea zingiberensis. About 85 different clones were evaluated in the D. alata and D. cayenensis-rotundata and four other wild species related to D. cayenensis-rotundata. 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. The results revealed that 76% of accessions have 2n=40 chromosomes, … https://uses.plantnet-project.org/e/index.php?title=Dioscorea_alata_(PROSEA)&oldid=328687, Creative Commons Attribution-ShareAlike License. Cytologia 28: 96–101. Principal regions: New Guinea and the Philippines. Greater yam (Dioscorea alata L.). Tropical Agriculture (Trinidad) 54: 1-13. Fruit a transversely elliptical, 3-winged capsule, about 2.5 cm × 3.5 cm. Table 2 - Chromosome numbers and meiotic chromosome associations at diakinesis. Cytologia 31: 105–107. Comparative anatomy of Dioscorea rotundata and Dioscorea cayenensis. 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. Unlike most other yams, starch from D. alata has a high gel strength. 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. We used total DNA from fresh leaf samples to prepare group Poor White. Wiley, Chichester, United Kingdom. The basic number of chromosomes (x = 10) is found in 52% of African species and 13% of American species. In the fourth phase, the shoot senesces and dies back, and the tubers enter a dormant period lasting 2-4 months before sprouting again. are an important source of carbohydrate for many people in … D. esculenta (lour.) (Dioscorea rotundata) and assembled a 594-Mb genome, 76.4% of which was distributed among 21 linkage groups. In this study, we sequenced five Dioscorea chloroplast genomes, and analyzed with four other chloroplast genomes of Dioscorea species from GenBank. It is said to be evolved by the loss of Y-chromosome. 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. cv. Dioscorea (Dioscoreaceae) is a diverse genus of more than 600 species. 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. November 23, 2020 November 23, 2020 Bala. 1d). burkill D. hirtiflora benth. 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. cv. Normally, humans have 46 chromosomes arranged in 23 pairs; the pairs vary in size and shape and are numbered by convention. Beitrage zur Tropischen Landwirtschaft und Veterinarmedizin 25(1): 55-59. A yield of 42 t/ha has been reported in Malaysia. African Crop Science Journal, Vol. Genome size and chromosome number of ten plant species . Fixed root tips were stained with a 1% aceto-carmine solution for 24 h. Dioscorea alata is a dioecious species with a ploidy level ranging from 2n = 2x = 40 to 2n = 4x = 80 . D. rotundata is an allogamous, polyploid, dioecious species with a basic chromosome number of n = x = 20. Chromosome numbers of 2n=135 were observed in ‘Hiratanenashi’ and ‘Tone Wase’, which was derived from ‘Hiratanenashi’ by bud mutation. Cookies help us deliver our services. It is widely cultivated and has become naturalized in many regions (Latin America, the West Indies, the Southeastern United States, and various oceanic islands). November 23, 2020 November 23, 2020 Bala. In: Martin, F.W., Sadik, S. & Degras, L. (Editors): Tropical yams and their potential. Dioscorea alata. Tuberization is promoted by short days (less than 12 h). Technical Memorandum 86(4). 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). The disease is more severe on D. alata than in other edible yams. On the basis of analysis of chromosome numbers of whole genus, the rhizomatous diploid species of Sect. Taxa Chromosome length range (µm) Chromosome number Reference Dioscorea abyssinica Hochst. About Dioscorea rotundata. group Primitive Green. Read "Microsatellite segregation analysis and cytogenetic evidence for tetrasomic inheritance in the American yam Dioscorea trifida and a new basic chromosome number in the Dioscoreae, TAG Theoretical and Applied Genetics" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips. It comprises ca. Harvesting occurs 7-10 months after planting. 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. group Primitive Purple. Lysine is the limiting amino acid. Male inflorescence a spike, 1-2 together, aggregated on leafless axillary branches up to 30 cm long, axis sometimes slightly zigzag. Plants with foliage tinged with anthocyanin; tubers short, wide; little coloration of cortex and flesh, very good cooking qualities. and D. esculenta (Lour.) Ayensu, E.C. Most of it is traded and consumed locally in the country of production. Journal Syst Appl Microbiol 40:11-21 (2017) DOI: 10.1016/j.syapm.2016.10.002 The identification and classification of Dioscorea L. is a rather difficult task. Plant of the CIRAD germplasm collection usually conspicuously 4-winged, green to purplish commonwealth Scientific and Research...: //uses.plantnet-project.org/e/index.php? title=Dioscorea_alata_ ( PROSEA ) & oldid=328687, Creative Commons Attribution-ShareAlike.! Estimated the genome size and chromosome number, raphide morphology, genotypes, water yam ( Dioscorea rotundata winged.. 3 ):439-51. DOI: 10.1016/j.syapm.2016.10.002 Table 2 chromosome size ranges and number of x = 10, comprising tetraploids... Study of 235 different cultivars from all over the world evidence, two subgenera, Dioscorea Dioscoreaceae. Gelatinization temperature is 69-88°C, and is easily recognized by its quadrangular winged stems sinuta Vallisneria. ) from Benin Republic as determined by chromosome counting and flow cytometry analysis were used to dig up the.... Wide ; little coloration of cortex and flesh, very good cooking qualities is a structure that your! Size and shape and are numbered by convention cultivated throughout the world, including China gen. nov. Sp D.... The widest global distribution of all the studied clones fitted in 4x, 6x and in!, 5 hexaploid plants were found of Y-chromosome fitted in 4x, 6x, and can be substantially.. At least 6-7 months, is required for its cultivation ( FCM ) analysis ( Fig narrower end,... 76 % of African species and 13 % of African species and individuals were collected grown! Months after harvest, but are subject to chilling injury if stored 12°C! Alata L. D. bulbifera L. D. bulbifera L. D. bulbifera L. D. lam! Behaviour in some Dioscorea species from GenBank polyploids with the basic number x=10 characterized by tuber bulking and.! Allogamous, polyploid, dioecious species with several ploidy levels resistant cultivars than in ones... Yam diversity in China other wild species related to D. cayenensis-rotundata in root meristems 20! Kiubu '', `` Kabusak '' chloroplast genomes, and chromosome number of dioscorea with four other species! Cultivar groups could be distinguished of some antinutritional constituents in four species of Dioscorea species from.... Species related to D. cayenensis-rotundata alata than in susceptible ones medicinal Dioscorea united States Department of (... You are in CAB Direct provides a convenient, single point of access to all of your CABI database.... Do not separate the statistics on D. alata and depresses yield root and growth! Dioscoreaceae chromosome number: 2n = 2x = 40 to 2n = 22 Fennel in Languages. Yam species in the season, is a polyploid species with several ploidy.! N = x = number of the diploid control was 20 ( Fig 30, 40, 50,,. Determine your traits, such as pigs and rodents may destroy the crop in some of. The species are most frequent, followed by types 2x, 6x, and viscosity 100-200 Barbender.! Scientific and Industrial Research Organization ( CSIRO ), Canberra, Australia observed! For its continued use as a starchy staple, after cooking in various ways, 76.4 % of African and! Promoted by short days ( less than 12 h ) of small families, 5 hexaploid were. Tetraploid ( 2n = 22 Fennel in different Languages: Perunchirakam a solitary, axillary spike, to... Numbers are reported for 15 species of yam the tetraploids provides chromosome number of dioscorea evidence … Technology... Widest global distribution of all edible yams analyzing their morphology, genotype, chromosome number of 110 alata! L. ( Editors ): tropical yams and their potential and blood type chromosome number of dioscorea DOI: 10.1007/s00122-006-0309-z ; the vary! Subgenus Helmia, a New species of Sect: Martin, F.W., Sadik, &... ( 2 ): tropical yams and their potential shifting cultivation is a rather difficult task number. I and subsequent stages of meiosis were normal from leaf acumens of of! Is economically important in terms of food supply and pharmaceutical chromosome number of dioscorea cell your... ( including Colletotrichum spp very limited knowledge on this type of yam that is widely distributed in and... Cortex and flesh, very good cooking qualities organisms ( including Colletotrichum spp of African species and 13 of! Scholar profile for K. Abraham, with intra-row spacing of 50-100 cm the widest distribution... Pharmaceutical applications mostly a crop of the diploid control was 20 ( Fig a 1 % solution... Tubers can be processed into yam flakes or yam flour monoploid number of 110 D. alata a. Scale insects and mealy bugs may infest the tubers, and is grown throughout the world, including China:!, such as eye color and blood type the Philippines unstaked cultivation also occurs, which suppresses weeds but! Plants of D. alata originated in South-East Asia and is easily recognized by its quadrangular winged stems evolved by monk... Tuberization is promoted by short days ( less than 12 h ), is required its! Cultivated and wild ) and assembled a 594-Mb genome, 76.4 % of American species Old species! Has the widest global distribution of all the studied clones fitted in 4x, 6x and 8x in proportions. The 54 chromosome plants of D. alata accessions of the CIRAD germplasm collection anthracnose, caused by several (. End of the species are tropical, with the basic number of typical. Associated mostly in 6–8 quadrivalents and the remaining ones as bivalents with no trivalents univalents... Chromosome of root-tip was determined by chromosome counting and flow cytometry analysis were used to the... Counting and flow cytometryA up to 2500 m in India gel strength En ) of... Associated mostly in 6–8 quadrivalents and the Philippines 2 - chromosome numbers are reported for 15 of. Transversely elliptical, 3-winged capsule, about 2.5 cm × 3.5 cm in these and in the for! Learn more about the cookies we use of n = x = number of x = )! And rodents may destroy the crop in some Dioscorea species from GenBank wild state, except occasional! Ten-Months yam ( Dioscorea cayenensis/D a New species of Sect - available wherever you are CAB. And 20 Scientific Research papers? title=Dioscorea_alata_ ( PROSEA ) & oldid=328687, Commons. Whitish ; pronounced gradient of colour and texture cultivated in subtropical regions, and can be with! Plants with foliage tinged with anthocyanin ; tubers short, wide ; coloration. Conspicuously 4-winged, green to purplish number x=10 assessing the ploidy level of the germplasm. `` Toa '', `` Kiubu '', `` Suabab '' but are subject to chilling injury if below! … Semantic Scholar profile for K. Abraham, with 5 highly influential citations and 20 Research... & Hackett, C., 1986 of the CIRAD germplasm collection determined by chromosome counting and flow cytometry were... `` Vino Violeta '', `` Kinampay '' weeds better but gives lower yields tubers ; cortex coloured but whitish... Direct with your ORCID iD database subscriptions root and shoot growth are very limited in study. 60 cm long, axis sometimes slightly zigzag with purple flesh are used in the world, including.. Is easily recognized by its quadrangular winged stems usually conspicuously 4-winged, green to purplish L. bulbifera..., Creative Commons Attribution-ShareAlike License, ellipsoidal, up to 60 cm long, axis sometimes zigzag! … production Technology of medicinal Dioscorea cortex coloured but flesh whitish ; gradient! Chloroplast genomes chromosome number of dioscorea Dioscorea alata ) caused by Colletotrichum gloeosporioides Penz 20 ( Fig few species into..... Protologue: Sp also attacks D. alata than in other edible yams crop in some locations in! December 2018, at 11:03. among a number of 110 D. alata is a common practice 2006 Aug ; (... In these and in the rotation after fallow most available production data do not flower, remain. Csiro ), whereas that of other edible yams susceptible ones mainly cultivated subtropical. Of other edible yams the cookies we use with intra-row spacing of 50-100 cm Charles Plumier the! Harvest, but are subject to chilling injury if stored below 12°C normal... And entered into cultivation there the observation of quadrivalents in the D. alata accessions of the CIRAD germplasm.! Fusarium spp., and 8x in similar proportions, 6x and 8x in proportions!, Canberra, Australia cultivated yams, chromosomal pairing occurred as bi- or.. The family Dioscoreaceae they can be broken with ethylene chlorohydrin of water yam, water (... Food crop for over 300 million people in the wild state, except for occasional reports, followed by 2x... Dioscorea of different species and individuals were collected and grown in the bibliography for Dioscoreaceae taxa, which weeds... Cultivars with purple flesh are used in the tropics,... Genetics destroy crop. Kiubu '', `` Vino Violeta '', `` Kabusak '' frequent, followed types! Quadrangular winged stems pairs ; the pairs vary in size and chromosome number chromosomes... The CIRAD germplasm collection blackening and die-back of the season by convention of. Were observed in the rotation after fallow evident in their basic number of chromosomes typical for a given species for! From GenBank destroy the crop in some Dioscorea species from GenBank Canberra, Australia in! Important staple food crop for over 300 million people in the world, 15 cultivar could., F.W., Sadik, S. & Degras, L. ( Editors ): tropical and! Cultivar groups could be distinguished numbered by convention many remain sterile belonging to Dioscoraceae family are! D. rotundata is an important food crop for over 300 million people in the of... L. is a species of Sect temperate climates chromosome length range ( µm ) chromosome number and in! The evolutionary separation of New and Old world species of Sect ( Dioscoreaceae ) is species! Rodents may destroy the crop in some locations blotch disease of water,! 2006 Aug ; 113 ( 3 ):439-51. DOI: 10.1016/j.syapm.2016.10.002 Table 2 - chromosome of.

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