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2. Chromosome numbers and breeding systems in some species of Hieracium subgen. Pilosella from Central Europe
- Creator:
- Rotreklová, Olga, Krahulcová, Anna, Vaňková, Danuše, Peckert, Tomáš, and Mráz, Patrik
- Type:
- article and TEXT
- Subject:
- Compositae, karyology, ploidy level, reproduction mode, Czech Republic, Slovakia, Poland, Slovenia, Germany, Hungary, Austria, and Ukraine
- Language:
- English
- Description:
- Chromosome numbers are given for 16 taxa (and one interspecific hybrid) of Hieracium subgen. Pilosella originating from Central Europe: H. apatelium Nägeli et Peter (2n = 45), H. aurantiacum L. (2n = 36), H. bauhini Besser (2n = 36, 45, 54), H. brachiatum Bertol. ex DC. (2n = 45, 48, 63, 72), H. densiflorum Tausch (2n = 36), H. echioides Lumn. (2n = 18, 27, 36), H. floribundum Wimm. et Grab. (2n = 36, 45), H. glomeratum Froel. (2n = 36, 45), H. guthnickianum Hegetschw. (2n = 54), H. lactucella Wallr. (2n = 18), H. onegense (Norrl.) Norrl. (2n = 18), H. pilosella L. (2n = 36, 45, 54), H. piloselliflorum Nägeli et Peter (2n = 36, 45), H. piloselloides Vill. (2n = 36), H. rothianum Wallr. (2n = 36), H. schultesii F. W. Schultz (2n = 45), and the hybrid H. floribundum × H. aurantiacum (2n = 36). New chromosome numbers are reported for H. brachiatum and H. floribundum. The octoploid cytotype (2n = 72), recorded in H. brachiatum, is the highest ploidy level ever found in plants from the subgen. Pilosella originating from the field. Aneuploidy, rare in this subgenus in Europe, occurs in this hybridogenous species as well: it was recorded in one plant (2n = 48) collected in a hybrid swarm H. pilosella × H. bauhini. The breeding system in H. bauhini, H. brachiatum, H. densiflorum, H. echioides, H. pilosella, H. piloselloides, and H. rothianum was studied. The sexual reproduction of pentaploid H. pilosella is a new observation: it means an increase of diversity in possible reproduction modes of those cytotypes having odd chromosome numbers.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/
3. Chromosome numbers and breeding systems of some European species of Hieracium subgen. Pilosella
- Creator:
- Rotreklová, Olga, Krahulcovvá, Anna, Mráz, Patrik, Mrázová, Viera, Mártonfiová, Lenka, Peckert, Tomáš, and Šingliarová, Barbora
- Type:
- article and TEXT
- Subject:
- Compositae, Czech Republic, DNA ploidy level, flow cytometry, France, Germany, Hungary, Italy, karyology, Poland, reproduction mode, Slovakia, and Slovenia
- Language:
- English
- Description:
- Chromosome numbers (ploidy levels) were recorded in the following 25 taxa of Hieracium subgen. Pilosella: H. arvicola Nägeli et Peter (2n = 45), H. aurantiacum L. (2n = 36, 45), H. bauhini Besser (2n = 36, 45), H. bifurcum M. Bieb. (2n = 45), H. brachiatum Bertol. ex DC. (2n = 36, 45), H. caespitosum Dumort. (2n = 36), H. cymosum L. (2n ~ 4x), H. densiflorum Tausch (2n = 36, ~ 4x), H. echioides Lumn. (2n = 18, 45), H. fallacinum F. W. Schultz (2n = 36, 45), H. floribundum Wimm. et Grab. (2n = 36, ~ 4x, 45,), H. glomeratum Froel. in DC. (2n = 45), H. iseranum Uechtr. (2n = 36), H. kalksburgense Wiesb. (2n ~ 5x), H. lactucella Wallr. (2n = 18), H. macranthum (Ten.) Ten. (2n = 18), H. onegense (Norrl.) Norrl. (2n = 18), H. pilosella L. (2n = 36, 45, 54), H. piloselliflorum Nägeli et Peter (2n = 45), H. pilosellinum F. W. Schultz (2n = 36, 45), H. piloselloides Vill. (2n = 27, 36, ~ 4x, 45, ~ 5x), H. pistoriense Nägeli et Peter (2n = 27), H. rothianum Wallr. (2n ~ 3x), H. schultesii F. W. Schultz (2n = 36, 45, ~ 5x), H. zizianum Tausch (2n = 27, 36, 54), and one hybrid, H. onegense × H. pilosella (2n = 36). Besides chromosome counts in root-tip meristems, flow cytometry was used to determine the DNA ploidy level in 83 samples of 9 species. The presence of a long marker chromosome was confirmed in tetraploid H. caespitosum and H. iseranum, in pentaploid H. glomeratum, and in both tetraploid and pentaploid H. floribundum. The documented mode of reproduction is sexual (H. densiflorum, H. echioides, H. piloselloides) and apomictic (H. brachiatum, H. floribundum, H. pilosellinum, H. piloselloides, H. rothianum, H. zizianum). Hieracium bifurcum and H. pistoriense are sterile. The chromosome number and/or mode of reproduction of H. bifurcum (almost sterile pentaploid), H. pilosellinum (apomictic pentaploid), H. piloselloides (apomictic triploid), H. pistoriense (sterile triploid), H. rothianum (apomictic triploid) and H. zizianum (apomictic triploid) are presented here for the first time. The sexual reproduction recorded in the pentaploid H. echioides is the second recorded case of this mode of reproduction in a pentaploid cytotype of Hieracium subgenus Pilosella. A previously unknown occurrence of H. pistoriense (H. macranthum – H. bauhini) in Slovakia is reported.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/
4. Chromosome numbers of Carex
- Creator:
- Rotreklová, Olga, Bureš, Petr, Řepka, Radomír, Grulich, Vít, Šmarda, Petr, Hralová, Ivana, Zedek, František, and Koutecký, Tomáš
- Type:
- article and TEXT
- Subject:
- agmatoploidy, holocentric chromosome, holokinetic chromosome, karyology, polyploidy, symploidy, and sedge
- Language:
- English
- Description:
- Chromosome numbers were determined for 97 samples of 95 sedge taxa (Carex) from the following countries: Austria (6 records), Bulgaria (1), the Canary Islands (Spain, 1), Cape Verde (1), the Czech Republic (51), Hungary (1), Italy (2), Norway (8), Russia (15), Slovakia (1), Sweden (1) and 9 North American plants cultivated in Czech botanical gardens. Chromosome numbers for Carex argunensis, C. callitrichos, C. campylorhina, C. flavocuspis subsp. krascheninnikovii, C. paniculata subsp. hansenii, C. pallida, C. quadriflora and C. xiphium are reported here for the first time. The first reports are presented for the European portion of the distribution area of Carex obtusata and for the Central European portion of the distributional areas of C. chordorrhiza, C. otrubae, C. rhizina and C. strigosa. New counts for the Czech Republic fill the gaps in the karyological data for this genus in relation to the Flora project in the Czech Republic.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/
5. Contribution to Rousettus aegyptiacus (Mammalia: Chiroptera) from Turkey
- Creator:
- Karataş, Ahmet, Yiğit, Nuri, Çolak, Ercüment, and Kankiliç, Tolga
- Type:
- article and TEXT
- Subject:
- Rousettus aegyptiacus, distribution, taxonomy, karyology, and Turkey
- Language:
- English
- Description:
- Rousettus aegyptiacus is active throughout the year in Turkey, where its morphology was studied collected from three localities in the south-west. The characteristics of the Turkish population were similar to those of the nominative subspecies. Moderate differences between the sexes were found in tibia length and total body length. The karyotype is 2n= 36, FN= 70, FNa= 66. The X chromosome is a large metacentric/submetacentric, and the Y chromosome is a dot-like acrocentric.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/
6. Genetic variation in agamospermous populations of Hieracium echioides in southern Slovakia and northern Hungary (Danube Basin)
- Creator:
- Peckert, Tomáš, Chrtek jun., Jindřich, and Plačková, Ivana
- Type:
- article and TEXT
- Subject:
- Asteraceae, allozyme analysis, Compositae, karyology, agamospermy, Hieracium echioides, and Danube Basin
- Language:
- English
- Description:
- Six populations of Hieracium echioides subsp. echioides var. tauscheri from the Danube Basin between Bratislava and Budapest (locations: Balinka, Čenkov, Devín, Dorog, Győr, Pilis) were analysed using allozyme and karyological analysis. Five allozyme systems (EST, LAP, 6PGDH, PGM, and SKDH) were used to analyse the genetic structure of the examined populations. Analyses revealed low genetic variation both within- and among populations. Four multilocus allozyme phenotypes were detected; three populations (Čenkov, Devín and Győr) possessed phenotype I exclusively, while phenotype II was found only in the Balinka and Dorog populations. Two different phenotypes were found in the population of Pilis (phenotypes III and IV). However, due to the complex banding patterns generated for EST, allelic interpretationwas not possible, and the Balinka and Dorog populations appeared to possess different phenotypes. All populations proved to be tetraploid (2n = 36) and agamospermous. The geographic distribution pattern of the analysed populations (one allozyme phenotype at several isolated localities) may reflect a more common occurrence of the taxon in the past. Landscape changes, caused by changes in human management of the country, may have resulted in a loss of suitable localities, mainly open sandy habitats. These changes may have caused the reduction and fragmentation of H. *tauscheri habitat.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/
7. Hieracium bauhini group in Central Europe: chromosome numbers and breeding systems
- Creator:
- Rotreklová , Olga
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- Compositae, cytogeography, Czech Republic, Germany, Hungary, karyology, ploidy level, Poland, reproduction mode, and Slovakia
- Language:
- English
- Description:
- Chromosome numbers for 239 plants from 84 localities in the Czech Republic, Slovakia, Hungary, Germany and Poland are given. Most of the populations were pentaploid (2n = 45), while hexaploid (2n = 54) and tetraploid (2n = 36) populations were rarer. A long marker chromosome was observed in plants from 8 pentaploid populations. Tetraploid plants occurred mainly in Slovakia and Hungary. In the Czech Republic and Germany, most populations were pentaploid. Hexaploid populations (2n = 54) were rare but scattered over the entire study area. The co-occurrence of two different cytotypes was documented at 7 sites. Most tetraploids were fully sexual and only a few tetraploid plants from Poland were apomictic; pentaploid and hexaploid plants were apomictic. Two morphotypes of H. bauhini were distinguished: tetraploid and hexaploid plants from Slovakia and Hungary, and some hexaploid plants from the Czech Republic were assigned to the H. magyaricum group, while tetraploids and hexaploids from the Czech Republic and Poland plus all pentaploids belong to the H. bauhini group.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
8. new chromosomal form of Nannospalax ehrenbergi from Turkey
- Creator:
- Coşkun, Yüksel
- Type:
- article and TEXT
- Subject:
- Mammalia, Rodentia, Spalacidae, Spalax, karyology, and Turkey
- Language:
- English
- Description:
- Different chromosomal races of the Nannospalax ehrenbergi (Nehring, 1898) complex inhabit south-eastern Turkey. In spite of the fairly restricted range of this mole rat in Turkey, no less than eight different karyotypes have been reported so far. These differ in diploid number (range from 52 to 58), fundamental number of chromosomal arms (ranging between 72 and 90) and in the fundamental number of autosomal arms (ranging from 68 to 86). The most common chromosomal form is 2n = 52, NF = 76, NFa = 72, which is known from Southeast Anatolia. In this paper I report on a new N. ehrenbergi karyotype from south-eastern Turkey. In 18 specimens investigated, the diploid number of chromosomes was 2n = 56, NF = 66, and NFa = 62. The karyotype consisted of 4 pairs of metacentrics/submetacentrics and 23 pairs of acrocentrics. The X chromosome was medium-sized submetacentric and the Y chromosome was small acrocentric. This chromosomal set is different to the most common Turkish N. ehrenbergi karyotype (2n = 52) and also differs markedly from the known chromosomal forms from Gaziantep (2n = 56, NF = 82, NFa = 78) and Tarsus (2n = 56, NF = 72, NFa = 68 ).
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/
9. Some karyological records and a new chromosomal form for Spalax (Mammalia: Rodentia) in Turkey
- Creator:
- Sözen, Mustafa, Matur, Ferhat, Çolak, Ercüment, Özkurt, Şakir, and Karataş, Ahmet
- Type:
- article and TEXT
- Subject:
- Spalax leucodon, Spalax ehrenbergi, karyology, and Turkey
- Language:
- English
- Description:
- The karyotypes of 73 specimens of subterranean mole rats of the superspecies Spalax leucodon Nordmann, 1840 from 21 localities, and six specimens of the superspecies Spalax ehrenbergi Nehring, 1898 from three localities in Turkey were analysed. S. leucodon has 2n = 56, NF = 78 in the populations from Thrace; and 2n = 48, NF = 71; 2n = 50, NF = 70; 2n = 50, NF = 72; 2n = 54, NF = 75; 2n = 56, NF = 72; 2n = 58, NF = 72; 2n = 60, NF = 74; 2n = 60, NF = 76; 2n =60, NF = 77 in the populations from Anatolia. S. ehrenbergi has 2n = 56, NF = 72 in the Adana population, and 2n =52, NF = 74 in the Elbeyli population. According to these karyological findings based on chromosome morphology, the diploid chromosome number of 2n = 48, NF = 71 reported here is new for Spalax leucodon in Turkey. The karyological peculiarities and distributional area of mole rats in the European part of Turkey have been determined in detail, and shown that only the 2n = 56 form is distributed in Thrace.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/
10. Sorbus milensis, a new hybridogenous species from northwestern Bohemia
- Creator:
- Lepší, Martin, Vít, Petr, Lepší, Petr, Boublík, Karel, and Suda, Jan
- Type:
- article and TEXT
- Subject:
- apoximis, Czech Republic, endemic, hybridization, karyology, multivariate morphometrics, phytosociology, Rosaceae, SSR markers, Sorbus latifolia agg., and taxonomy
- Language:
- English
- Description:
- A new apomictic triploid (2n = 3x = 51) species belonging to the Sorbus latifolia group, S. milensis M. Lepší, K. Boublík, P. Lepší et P. Vít, putatively of hybridogenous origin between sexual Sorbus aria s.l. and S. torminalis, is described from the České středohoří Mts (northwestern Bohemia, Czech Republic). Several biosystematic techniques, including molecular (nuclear microsatellite markers), karyological (chromosome counts, genome size) and multivariate morphometrics were used to assess the variation in this species and justify its independent taxonomic status. The only known population of S. milensis consists of 38 adult and 19 juvenile individuals, is phenotypically homogenous and distinct from other Bohemian hybridogenous Sorbus species. All sampled individuals were karyologically uniform and showed little genetic variation. Sorbus milensis is a stenoendemic occurring on Milá hill (situated ca 9.5 km NNW of the town of Louny) where it grows on basaltic rocks, in ravines and on screes. The majority of the individuals grow in scree forests of the Tilio-Acerion alliance; other vegetation types include xeric scrub of the Prunion spinosae alliance and xerothermophilous grassland communities of the Festucion valesiacae alliance. A detailed distribution map for this species is provided as well as photographs of the type specimen.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/