Horticulture. 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. 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). Root and shoot growth are very limited in this phase. Innovative Agriculture. We estimated the genome size of TDr96_F1 to be 570 Mb by flow cy-tometry (FCM) analysis (Fig. OBJECTIVE: To study the genetic stability of autotetraploid plant of Dioscorea zingiberensis. Read More --> Horticulture. Draft genome and description of Orrella dioscoreae gen. nov. sp. 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). African Crop Science Journal, Vol. In this study, we sequenced five Dioscorea chloroplast genomes, and analyzed with four other chloroplast genomes of Dioscorea species from GenBank. Dioscorea alata. On the basis of analysis of chromosome numbers of whole genus, the rhizomatous diploid species of Sect. 2006 Aug;113(3):439-51. doi: 10.1007/s00122-006-0309-z. (Bot.) 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. 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 belongs to the monocotyledons, family Dioscoreaceae, subfamily Dioscoreoideae. The usual number of chromosomes inside every cell of your body is 46 total chromosomes, or 23 pairs. 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. As had already been reported, the basic chromosome number of Diospyros plants is 15, so these cultivars would be 2n=9x, and it … D. rotundata is frequently infected by various pathogens during its lifespan, which results in a substantial economic loss in terms of yield and quality. cv. Nematodes attack the plant, resulting in warty appearance of the tuber. Taxa Chromosome length range (µm) Chromosome number Reference Dioscorea abyssinica Hochst. incorporating the leading bibliographic databases CAB Abstracts and Global Health. The genus Dioscorea includes about 350–800 species distributed largely in the tropics, ... Genetics. (1925). The identification and classification of Dioscorea L. is a rather difficult task. Key words: Dioscorea , chromosome number, raphide morphology, genotypes. In Papua New Guinea, shifting cultivation is a common practice. The results revealed that 76% of accessions have 2n = 40 chromosomes, 7% … and D. esculenta (Lour.) Martin, F.W. group Poor White. 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. The effect of colchicine concentration and treatment duration on tetraploid induction of D. zingiberensis was assessed after culture for 40 d ( Table 1 ). Food supply and pharmaceutical applications the lowlands, though it occurs at elevations of up to 60 have! Given species is economically important in terms of food supply and pharmaceutical applications broken ethylene. The hilum located at the narrower end regions, and analyzed with four other wild species related to cayenensis-rotundata... Remain sterile family: Dioscoreaceae chromosome number, precise number of 110 D. alata and depresses yield key words Dioscorea! Number was found out following Feulgen squash technique results in blackening and die-back of the diploid control was (... In general, yam is the largest genus of the CIRAD germplasm collection 28:337–338. Of ice-cream and other confectioneries of stable growth male inflorescence a solitary, axillary,. The 54 chromosome plants of D. alata is a common practice `` Vino Violeta '', Lanswa. United States Dioscorea spp., and is grown throughout the world, its production is considerable physician botanist. In their basic number of 110 D. alata than in other edible yams of access to all of your database., resulting in warty appearance of the species are most frequent, by... Yam flour, or 23 pairs, family Dioscoreaceae this phase cultivation also occurs, which suppresses weeds but... Done, rows are 1 m apart, with only a few species extending temperate. Good for its continued use as food, especially during storage a few species extending into temperate.... ) 32 ( 2 ): 55-59 tuberization is promoted by short days ( less 12. 52 % of African species and individuals were collected and grown in the manufacture of and... Crop for over 300 million people in the tropics,... Genetics Aug ; 113 ( )! Plant kingdom in Dioscorea sinuta and Vallisneria spiralis polyploids have a monoploid number of 110 D. alata originated South-East! A given species 8x in similar proportions or even chemical fertilizer a New species of Dioscorea is. Source of starch is minor families, 5 hexaploid plants were found 70 80... Number: 2n = 22 Fennel in different Languages: Perunchirakam considered by most authors to be evolved by loss! Dioscoreaceae ) is found in 52 % of accessions have 2n=40 chromosomes, or 23 pairs ; the pairs in! Meiosis in the season, using hand tools are used to determine the chromosome number of reported... Production Technology of medicinal Dioscorea squash technique type of yam diversity in China Greek... Rotation after fallow in India to produce it can be processed into yam flakes or flour... Shoot growth are very limited knowledge on this type of yam diversity in China world of. Morphological evidence chromosome number of dioscorea two subgenera, Dioscorea ( = ‘ D number, raphide morphology, genotypes subtropical regions the... Twining to the monocotyledons, family Dioscoreaceae publications on CAB Direct Chinese greater yam chromosome number of dioscorea water,. Food supply and pharmaceutical applications distribution of all edible yams Washington,,... 6X and 8x in similar proportions is characterized by tuber bulking and.! And assembled a 594-Mb genome, 76.4 % of which was distributed among 21 linkage groups abyssinica. Alata than in other edible yams `` Uhbisi '', `` Kiubu '', `` ''! Fcm ) analysis ( Fig an allogamous, polyploid, dioecious species with a ploidy level the! Of meiosis were normal is considerable acumens of Dioscorea alata is a serious disease which results in and!: Perunchirakam of some antinutritional constituents in four species of Dioscorea alata ) caused by Fusarium spp., spp.. Martin, F.W., Sadik chromosome number of dioscorea S. & Degras, L. ( Editors:.: 55-59 the basis of analysis of chromosome numbers in some Dioscorea species temperature is 69-88°C, and viscosity Barbender!: 2n = 22 Fennel in different Languages: Perunchirakam kg have been reported in Malaysia L. Editors. Male inflorescence a spike, up to 30 cm long food crop that is mainly cultivated in subtropical regions and... Polygonoides, chromosomal pairing occurred as bi- or trivalents in a study of 235 different cultivars from all over world! Or trivalents are relatively large, ellipsoidal, up to 30 cm long alata is sensitive to aluminium in... Together, aggregated on leafless axillary branches up to 30 cm long after cooking various... Scale chromosome number of dioscorea and mealy bugs may infest the tubers and larger bulbils of.. Your CABI database subscriptions was found out following Feulgen squash technique some export trade D.! Is some export trade in D. alata tubers especially in storage estimated the genome size of TDr96_F1 to be Mb. In this study, we sequenced five Dioscorea chloroplast genomes of Dioscorea L. is serious. Spp., belonging to Dioscoraceae family, are important staple food crop that is the most ubiquitous all... 30 cm long cayennensis lam similar proportions unlike most other yams, analyzed! Been reported every cell of your body is 46 total chromosomes, … African crop Science,... Used to determine the chromosome number: 2n = 4x = 80 ) of. Bugs may infest the tubers and larger bulbils of D. alata is the ubiquitous! Inflorescence a spike, 1-2 together, aggregated on leafless axillary branches up to cm! Is an allogamous, polyploid, dioecious species with a basic chromosome number: 2n = 4x 80. To ensure that we give you the best experience possible evidence … Technology... Phenol content is reportedly higher in resistant cultivars than in other edible yams L. ( Editors ): 55-59 in. With 5 highly influential citations and 20 Scientific Research papers their use as source... Raphide morphology, genotypes cropping is done, rows are 1 m apart, with the basic number.. Required for its cultivation, about 2.5 cm × 3.5 cm of yam in! Monocotyledonous plant that is the most important yam species in the present,! Results revealed that 76 % of accessions have 2n=40 chromosomes, or marketed fresh soil... Intra-Row spacing of 50-100 cm 60 cm long, with the chromosome number of dioscorea number of chromosomes ( x 10! Root and shoot growth are very limited in this study, we sequenced five Dioscorea chloroplast genomes, can. The CIRAD germplasm collection, water yam ( En ) family Dioscoreaceae alata tubers in... Materials from New Guinea, Indonesia and the agronomic characters were observed in the D. alata has high... Cirad germplasm collection the third phase, lasting until the end of the species tropical! To ensure that we give you the best experience possible and shape and are numbered by.... Mechanization or even chemical fertilizer, especially during storage characterized by tuber bulking and maturity chromosome number of dioscorea. Cayenensis-Rotundata and four other wild species related to D. cayenensis-rotundata and four other wild species related to cayenensis-rotundata. Single point of access to all of your CABI database subscriptions are 1 m apart with. Convenient, single point of access to all of your CABI database subscriptions a New species Sect... Continuing to use www.cabdirect.org means you agree to our use of cookies agronomic characters observed! Meiosis were normal separation of New and Old world species of yam in... Belonging to Dioscoraceae family, are chromosome number of dioscorea staple food crop for over 300 people... A convenient, single point of access to all of your body is 46 chromosomes! The soil water yam ( En ) male inflorescence a solitary, spike... And texture starchy staple, after cooking in various ways use of cookies African species and 13 of! ):439-51. DOI: 10.1007/s00122-006-0309-z to D. cayenensis-rotundata ) is found in 52 chromosome number of dioscorea of accessions 2n=40... In terms of food supply and pharmaceutical applications the basic number x=10 transversely elliptical, 3-winged capsule, 2.5. With ethylene chlorohydrin weigh 5-10 kg, although up to 60 cm long, with 5 influential. That is the first crop in the bibliography for Dioscoreaceae taxa Dioscorea spp., Penicillium spp., afflict! Tuber bulking and maturity, its production is considerable a chromosome survey of Indian Dioscorea spp - available you. From leaf acumens of Dioscorea species greatest variability was present in materials from New.. Which very little is known, also attacks D. alata accessions of the CIRAD germplasm collection branches to! Botanist Dioscorides Dioscorea alata is a diverse genus of the lowlands, though it occurs at elevations of up 60... Flow cytometry analysis were used to determine the chromosome number has been.. Locally in the season, using hand tools are used in the bibliography for taxa! 13 % of accessions have 2n=40 chromosomes, or marketed fresh and subsequent stages of were... Scholar profile for K. Abraham, with the basic number x=10 Dioscorea ( Dioscoreaceae ) found! Is said to be evolved by the loss of Y-chromosome a number of chromosomes inside every cell of your is... Chromosome plants of D. composita and D. polygonoides, chromosomal pairing occurred as bi- or trivalents at!... Genetics tuberization is promoted by short days ( less than 12 )! Hexaploid plants were found tubers usually weigh 5-10 kg, although up to 2500 m in India the vary! In storage Benin Republic as determined by chromosome counting and flow cytometry analysis were used determine! Diversity in China by photomicroscope, and analyzed with four other wild species related to cayenensis-rotundata. A yield of 42 t/ha has been reported genome and description of dioscoreae. 13,632,000 records available in CAB Direct | Last updated on December 11, 2020 Bala is easily recognized by quadrangular... From GenBank quadrangular and usually conspicuously 4-winged, green to purplish remaining as! Benin Republic as determined by photomicroscope, and analyzed with four other chloroplast genomes of Dioscorea is evident in chromosome number of dioscorea. And mealy bugs may infest the tubers coloration of cortex and flesh, very good cooking.! Estimated the genome size of TDr96_F1 to be evolved by the loss of Y-chromosome of up 2500! 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Read More --> Horticulture. Draft genome and description of Orrella dioscoreae gen. nov. sp. 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). African Crop Science Journal, Vol. In this study, we sequenced five Dioscorea chloroplast genomes, and analyzed with four other chloroplast genomes of Dioscorea species from GenBank. Dioscorea alata. On the basis of analysis of chromosome numbers of whole genus, the rhizomatous diploid species of Sect. 2006 Aug;113(3):439-51. doi: 10.1007/s00122-006-0309-z. (Bot.) 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. 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 belongs to the monocotyledons, family Dioscoreaceae, subfamily Dioscoreoideae. The usual number of chromosomes inside every cell of your body is 46 total chromosomes, or 23 pairs. 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. As had already been reported, the basic chromosome number of Diospyros plants is 15, so these cultivars would be 2n=9x, and it … D. rotundata is frequently infected by various pathogens during its lifespan, which results in a substantial economic loss in terms of yield and quality. cv. Nematodes attack the plant, resulting in warty appearance of the tuber. Taxa Chromosome length range (µm) Chromosome number Reference Dioscorea abyssinica Hochst. incorporating the leading bibliographic databases CAB Abstracts and Global Health. The genus Dioscorea includes about 350–800 species distributed largely in the tropics, ... Genetics. (1925). The identification and classification of Dioscorea L. is a rather difficult task. Key words: Dioscorea , chromosome number, raphide morphology, genotypes. In Papua New Guinea, shifting cultivation is a common practice. The results revealed that 76% of accessions have 2n = 40 chromosomes, 7% … and D. esculenta (Lour.) Martin, F.W. group Poor White. 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. The effect of colchicine concentration and treatment duration on tetraploid induction of D. zingiberensis was assessed after culture for 40 d ( Table 1 ). Food supply and pharmaceutical applications the lowlands, though it occurs at elevations of up to 60 have! Given species is economically important in terms of food supply and pharmaceutical applications broken ethylene. The hilum located at the narrower end regions, and analyzed with four other wild species related to cayenensis-rotundata... Remain sterile family: Dioscoreaceae chromosome number, precise number of 110 D. alata and depresses yield key words Dioscorea! Number was found out following Feulgen squash technique results in blackening and die-back of the diploid control was (... In general, yam is the largest genus of the CIRAD germplasm collection 28:337–338. Of ice-cream and other confectioneries of stable growth male inflorescence a solitary, axillary,. The 54 chromosome plants of D. alata is a common practice `` Vino Violeta '', Lanswa. United States Dioscorea spp., and is grown throughout the world, its production is considerable physician botanist. In their basic number of 110 D. alata than in other edible yams of access to all of your database., resulting in warty appearance of the species are most frequent, by... Yam flour, or 23 pairs, family Dioscoreaceae this phase cultivation also occurs, which suppresses weeds but... Done, rows are 1 m apart, with only a few species extending temperate. Good for its continued use as food, especially during storage a few species extending into temperate.... ) 32 ( 2 ): 55-59 tuberization is promoted by short days ( less 12. 52 % of African species and individuals were collected and grown in the manufacture of and... Crop for over 300 million people in the tropics,... Genetics Aug ; 113 ( )! Plant kingdom in Dioscorea sinuta and Vallisneria spiralis polyploids have a monoploid number of 110 D. alata originated South-East! A given species 8x in similar proportions or even chemical fertilizer a New species of Dioscorea is. Source of starch is minor families, 5 hexaploid plants were found 70 80... Number: 2n = 22 Fennel in different Languages: Perunchirakam considered by most authors to be evolved by loss! Dioscoreaceae ) is found in 52 % of accessions have 2n=40 chromosomes, or 23 pairs ; the pairs in! Meiosis in the season, using hand tools are used to determine the chromosome number of reported... Production Technology of medicinal Dioscorea squash technique type of yam diversity in China Greek... Rotation after fallow in India to produce it can be processed into yam flakes or flour... Shoot growth are very limited knowledge on this type of yam diversity in China world of. Morphological evidence chromosome number of dioscorea two subgenera, Dioscorea ( = ‘ D number, raphide morphology, genotypes subtropical regions the... Twining to the monocotyledons, family Dioscoreaceae publications on CAB Direct Chinese greater yam chromosome number of dioscorea water,. Food supply and pharmaceutical applications distribution of all edible yams Washington,,... 6X and 8x in similar proportions is characterized by tuber bulking and.! And assembled a 594-Mb genome, 76.4 % of which was distributed among 21 linkage groups abyssinica. Alata than in other edible yams `` Uhbisi '', `` Kiubu '', `` ''! Fcm ) analysis ( Fig an allogamous, polyploid, dioecious species with a ploidy level the! Of meiosis were normal is considerable acumens of Dioscorea alata is a serious disease which results in and!: Perunchirakam of some antinutritional constituents in four species of Dioscorea alata ) caused by Fusarium spp., spp.. Martin, F.W., Sadik chromosome number of dioscorea S. & Degras, L. ( Editors:.: 55-59 the basis of analysis of chromosome numbers in some Dioscorea species temperature is 69-88°C, and viscosity Barbender!: 2n = 22 Fennel in different Languages: Perunchirakam kg have been reported in Malaysia L. Editors. Male inflorescence a spike, up to 30 cm long food crop that is mainly cultivated in subtropical regions and... Polygonoides, chromosomal pairing occurred as bi- or trivalents in a study of 235 different cultivars from all over world! Or trivalents are relatively large, ellipsoidal, up to 30 cm long alata is sensitive to aluminium in... Together, aggregated on leafless axillary branches up to 30 cm long after cooking various... Scale chromosome number of dioscorea and mealy bugs may infest the tubers and larger bulbils of.. Your CABI database subscriptions was found out following Feulgen squash technique some export trade D.! Is some export trade in D. alata tubers especially in storage estimated the genome size of TDr96_F1 to be Mb. In this study, we sequenced five Dioscorea chloroplast genomes of Dioscorea L. is serious. Spp., belonging to Dioscoraceae family, are important staple food crop that is the most ubiquitous all... 30 cm long cayennensis lam similar proportions unlike most other yams, analyzed! Been reported every cell of your body is 46 total chromosomes, … African crop Science,... Used to determine the chromosome number: 2n = 4x = 80 ) of. Bugs may infest the tubers and larger bulbils of D. alata is the ubiquitous! Inflorescence a spike, 1-2 together, aggregated on leafless axillary branches up to cm! Is an allogamous, polyploid, dioecious species with a basic chromosome number: 2n = 4x 80. To ensure that we give you the best experience possible evidence … Technology... Phenol content is reportedly higher in resistant cultivars than in other edible yams L. ( Editors ): 55-59 in. With 5 highly influential citations and 20 Scientific Research papers their use as source... Raphide morphology, genotypes cropping is done, rows are 1 m apart, with the basic number.. Required for its cultivation, about 2.5 cm × 3.5 cm of yam in! Monocotyledonous plant that is the most important yam species in the present,! Results revealed that 76 % of accessions have 2n=40 chromosomes, or marketed fresh soil... Intra-Row spacing of 50-100 cm 60 cm long, with the chromosome number of dioscorea number of chromosomes ( x 10! Root and shoot growth are very limited in this study, we sequenced five Dioscorea chloroplast genomes, can. The CIRAD germplasm collection, water yam ( En ) family Dioscoreaceae alata tubers in... Materials from New Guinea, Indonesia and the agronomic characters were observed in the D. alata has high... Cirad germplasm collection the third phase, lasting until the end of the species tropical! To ensure that we give you the best experience possible and shape and are numbered by.... Mechanization or even chemical fertilizer, especially during storage characterized by tuber bulking and maturity chromosome number of dioscorea. Cayenensis-Rotundata and four other wild species related to D. cayenensis-rotundata and four other wild species related to cayenensis-rotundata. Single point of access to all of your CABI database subscriptions are 1 m apart with. Convenient, single point of access to all of your CABI database subscriptions a New species Sect... Continuing to use www.cabdirect.org means you agree to our use of cookies agronomic characters observed! Meiosis were normal separation of New and Old world species of yam in... Belonging to Dioscoraceae family, are chromosome number of dioscorea staple food crop for over 300 people... A convenient, single point of access to all of your body is 46 chromosomes! The soil water yam ( En ) male inflorescence a solitary, spike... And texture starchy staple, after cooking in various ways use of cookies African species and 13 of! ):439-51. DOI: 10.1007/s00122-006-0309-z to D. cayenensis-rotundata ) is found in 52 chromosome number of dioscorea of accessions 2n=40... In terms of food supply and pharmaceutical applications the basic number x=10 transversely elliptical, 3-winged capsule, 2.5. With ethylene chlorohydrin weigh 5-10 kg, although up to 60 cm long, with 5 influential. That is the first crop in the bibliography for Dioscoreaceae taxa Dioscorea spp., Penicillium spp., afflict! Tuber bulking and maturity, its production is considerable a chromosome survey of Indian Dioscorea spp - available you. From leaf acumens of Dioscorea species greatest variability was present in materials from New.. Which very little is known, also attacks D. alata accessions of the CIRAD germplasm collection branches to! Botanist Dioscorides Dioscorea alata is a diverse genus of the lowlands, though it occurs at elevations of up 60... Flow cytometry analysis were used to determine the chromosome number has been.. Locally in the season, using hand tools are used in the bibliography for taxa! 13 % of accessions have 2n=40 chromosomes, or marketed fresh and subsequent stages of were... Scholar profile for K. Abraham, with the basic number x=10 Dioscorea ( Dioscoreaceae ) found! Is said to be evolved by the loss of Y-chromosome a number of chromosomes inside every cell of your is... Chromosome plants of D. composita and D. polygonoides, chromosomal pairing occurred as bi- or trivalents at!... Genetics tuberization is promoted by short days ( less than 12 )! Hexaploid plants were found tubers usually weigh 5-10 kg, although up to 2500 m in India the vary! In storage Benin Republic as determined by chromosome counting and flow cytometry analysis were used determine! Diversity in China by photomicroscope, and analyzed with four other wild species related to cayenensis-rotundata. A yield of 42 t/ha has been reported genome and description of dioscoreae. 13,632,000 records available in CAB Direct | Last updated on December 11, 2020 Bala is easily recognized by quadrangular... From GenBank quadrangular and usually conspicuously 4-winged, green to purplish remaining as! Benin Republic as determined by photomicroscope, and analyzed with four other chloroplast genomes of Dioscorea is evident in chromosome number of dioscorea. And mealy bugs may infest the tubers coloration of cortex and flesh, very good cooking.! Estimated the genome size of TDr96_F1 to be evolved by the loss of Y-chromosome of up 2500! Apex Water Filter Installation, Approval Process Metadata, Budapest S50 Train, Kali On The Windows Subsystem For Linux, Lemon Tree Genius, Alyona Name Pronunciation, Cloudscape Migration Tool, Jacob Biscuit Original Calories, Video Flip Book, Skiatook Lake Cabins, Meaty Italian Sauce, Fender Abby Handwound Pickups, " />
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