Abstract:
:The species-rich and widespread genus Taraxacum F. H. Wiggers, 1780 (Asteraceae subfamily Cichorioideae) is one of the most taxonomically complex plant genera in the world, mainly due to its combination of different sexual and asexual reproduction strategies. Polyploidy is usually confined to apomictic microspecies, varying from 3x to 6x (rarely 10x). In this study, we focused on Taraxacum sect. Taraxacum (= T.sect.Ruderalia; T.officinale group), i.e., the largest group within the genus. We counted chromosome numbers and measured the DNA content for species sampled in Central Europe, mainly in Czechia. The chromosome number of the 28 species (T.aberrans Hagendijk, Soest & Zevenbergen, 1974, T.atroviride Štěpánek & Trávníček, 2008, T.atrox Kirschner & Štěpánek, 1997, T.baeckiiforme Sahlin, 1971, T.chrysophaenum Railonsala, 1957, T.coartatum G.E. Haglund, 1942, T.corynodes G.E. Haglund, 1943, T.crassum H. Øllgaard & Trávníček, 2003, T.deltoidifrons H. Øllgaard, 2003, T.diastematicum Marklund, 1940, T.gesticulans H. Øllgaard, 1978, T.glossodon Sonck & H. Øllgaard, 1999, T.guttigestans H. Øllgaard in Kirschner & Štěpánek, 1992, T.huelphersianum G.E. Haglund, 1935, T.ingens Palmgren, 1910, T.jugiferum H. Øllgaard, 2003, T.laticordatum Marklund, 1938, T.lojoense H. Lindberg, 1944 (= T.debrayi Hagendijk, Soest & Zevenbergen, 1972, T.lippertianum Sahlin, 1979), T.lucidifrons Trávníček, ineditus, T.obtusifrons Marklund, 1938, T.ochrochlorum G.E. Haglund, 1942, T.ohlsenii G.E. Haglund, 1936, T.perdubium Trávníček, ineditus, T.praestabile Railonsala, 1962, T.sepulcrilobum Trávníček, ineditus, T.sertatum Kirschner, H. Øllgaard & Štěpánek, 1997, T.subhuelphersianum M.P. Christiansen, 1971, T.valens Marklund, 1938) is 2n = 3x = 24. The DNA content ranged from 2C = 2.60 pg (T.atrox) to 2C = 2.86 pg (T.perdubium), with an average value of 2C = 2.72 pg. Chromosome numbers are reported for the first time for 26 species (all but T.diastematicum and T.obtusifrons), and genome size estimates for 26 species are now published for the first time.
journal_name
Comp Cytogenetjournal_title
Comparative cytogeneticsauthors
Macháčková P,Majeský Ľ,Hroneš M,Hřibová E,Bohumil Trávníček,Vašut RJdoi
10.3897/CompCytogen.v12i3.27307subject
Has Abstractpub_date
2018-09-18 00:00:00pages
403-420issue
3eissn
1993-0771issn
1993-078Xjournal_volume
12pub_type
杂志文章abstract::Peanut, Arachis hypogaea (Linnaeus, 1753) is an allotetraploid cultivated plant with two subgenomes derived from the hybridization between two diploid wild species, A. duranensis (Krapovickas & W. C. Gregory, 1994) and A. ipaensis (Krapovickas & W. C. Gregory, 1994), followed by spontaneous chromosomal duplication. To...
journal_title:Comparative cytogenetics
pub_type: 杂志文章
doi:10.3897/CompCytogen.v12i1.20334
更新日期:2018-03-14 00:00:00
abstract::The centromere is a chromosomal region where the kinetochore is formed, which is the attachment point of spindle fibers. Thus, it is responsible for the correct chromosome segregation during cell division. Telomeres protect chromosome ends against enzymatic degradation and fusions, and localize chromosomes in the cell...
journal_title:Comparative cytogenetics
pub_type: 杂志文章,评审
doi:10.3897/CompCytogen.v14i2.51895
更新日期:2020-07-07 00:00:00
abstract::A lectotype is designated for the Tibetan species Deronectesemmerichi Falkenström, 1936 (Currently Boreonectesemmerichi (Falkenström)), and its habitus, as well as the median lobe and parameres of its aedeagus, are figured along with additional comparative material. Material of Boreonectesemmerichi from Sikkim (BMNH) ...
journal_title:Comparative cytogenetics
pub_type: 杂志文章
doi:10.3897/CompCytogen.v9i1.4463
更新日期:2015-03-31 00:00:00
abstract::Brazilian fish cytogenetics started as early as the seventies in three pioneering research groups, located at the Universidade Estadual Paulista (UNESP, Botucatu, SP), Universidade Federal de São Carlos (UFSCar, São Carlos, SP) and Universidade de São Paulo (USP, São Paulo, SP). Investigations that have been conducted...
journal_title:Comparative cytogenetics
pub_type: 杂志文章
doi:10.3897/CompCytogen.v11i4.14713
更新日期:2017-10-20 00:00:00
abstract::The genomes of five Agropyron Gaertner, 1770 species were characterized using all potential di- or trinucleotide simple sequence repeat (SSR) motifs and four satellite DNA repeats as fluorescence in situ hybridization (FISH) probes. The sites of 5S and 45S rDNA were relatively conserved among the diploid and tetraploi...
journal_title:Comparative cytogenetics
pub_type: 杂志文章
doi:10.3897/CompCytogen.v11i3.13124
更新日期:2017-08-03 00:00:00
abstract::In the present study, the chromosomes numbers were confirmed, 2n = 34 for Amaranthus cruentus Linnaeus, 1759, and 2n = 32 for Amaranthus hypochondriacus Linnaeus, 1753, Amaranthus mantegazzianus Passer, 1864, and Amaranthus caudatus Linnaeus, 1753. The distribution and variability of constitutive heterochromatin were ...
journal_title:Comparative cytogenetics
pub_type: 杂志文章
doi:10.3897/CompCytogen.v7i1.4276
更新日期:2013-03-26 00:00:00
abstract::Variation in the number of chromosomes was revealed in 61 samples of Cimex lectularius Linnaeus, 1758 from the Czech Republic and other European countries, hosted on Myotis Kaup, 1829 (4) and Homo sapiens Linnaeus, 1758 (57). The karyotype of all the specimens of Cimex lectularius analysed contained 26 autosomes and a...
journal_title:Comparative cytogenetics
pub_type: 杂志文章
doi:10.3897/CompCytogen.v7i4.6012
更新日期:2013-10-03 00:00:00
abstract::Plantago lagopus is a diploid (2n = 2x =12) weed belonging to family Plantaginaceae. We reported a novel B chromosome in this species composed of 5S and 45S ribosomal DNA and other repetitive elements. In the present work, presence of B chromosome(s) was confirmed through FISH on root tip and pollen mother cells. Seve...
journal_title:Comparative cytogenetics
pub_type: 杂志文章
doi:10.3897/CompCytogen.11i2.11779
更新日期:2017-05-22 00:00:00
abstract::The African chironomid Polypedilumvanderplanki Hinton, 1951 is the only chironomid able to withstand almost complete desiccation in an ametabolic state known as anhydrobiosis. The karyotypes of two allopatric populations of this anhydrobiotic chironomid, one from Nigeria and another from Malawi, were described accordi...
journal_title:Comparative cytogenetics
pub_type: 杂志文章
doi:10.3897/CompCytogen.v9i2.9104
更新日期:2015-05-11 00:00:00
abstract::The Tc1 mariner element is widely distributed among organisms and have been already described in different species of fish. The genus Ancistrus (Kner, 1854) has 68 nominal species and is part of an interesting taxonomic and cytogenetic group, as well as presenting a variation of chromosome number, ranging from 2n=34 t...
journal_title:Comparative cytogenetics
pub_type: 杂志文章
doi:10.3897/CompCytogen.v11i1.10519
更新日期:2017-01-20 00:00:00
abstract::Cichlids represent one of the most species-rich families of fishes and have attracted the attention of evolutionary biologists due to the rapid radiation occurring in some groups and the importance of some species in the world aquaculture. Cytogenetic analysis was conducted in 10 cichlid species from the Araguaia Rive...
journal_title:Comparative cytogenetics
pub_type: 杂志文章
doi:10.3897/CompCytogen.v6i2.1739
更新日期:2012-04-27 00:00:00
abstract::Parallel trends of chromosomal evolution in Aphidococca are discussed, based on the catalogue of chromosomal numbers and genetic systems of scale insects by Gavrilov (2007) and the new catalogue for aphids provided in the present paper. To date chromosome numbers have been reported for 482 species of scale insects and...
journal_title:Comparative cytogenetics
pub_type: 杂志文章
doi:10.3897/CompCytogen.v9i3.4930
更新日期:2015-07-09 00:00:00
abstract::Drosophila melanogaster Meigen, 1830 has served as a model insect for over a century. Sequencing of the 11 additional Drosophila Fallen, 1823 species marks substantial progress in comparative genomics of this genus. By comparison, practically nothing is known about the genome size or genome sequences of parasitic wasp...
journal_title:Comparative cytogenetics
pub_type: 杂志文章
doi:10.3897/CompCytogen.v5i3.1435
更新日期:2011-08-24 00:00:00
abstract::Stingless bees are distributed widely in the tropics, where they are major pollinators of several plant species. In this study, the karyotype of Meliponaquinquefasciata Lepeletier, 1836 was analysed, with emphasis on the presence of B chromosomes. Post-defecating larvae were analysed using Giemsa staining, the C-bandi...
journal_title:Comparative cytogenetics
pub_type: 杂志文章
doi:10.3897/CompCytogen.v12i4.29165
更新日期:2018-11-09 00:00:00
abstract::The fluorescent in situ hybridization (FISH) technique has been applied to somatic chromosomes in the medicinally important species, Bunium persicum, to elucidate its karyotypes. The bicolour FISH technique involving 18S-5.8S-26S and 5S ribosomal RNA genes as probes was used to assign physical localization and measure...
journal_title:Comparative cytogenetics
pub_type: 杂志文章
doi:10.3897/CompCytogen.v5i4.965
更新日期:2011-11-09 00:00:00
abstract::The subfamily Harpactorinae is composed of six tribes. Phylogenetic studies bring together some of Harpactorinae tribes, but by and large the data on evolutionary relationships of the subfamily are scarce. Chromosome studies are of great importance for understanding the systematics of different groups of insects. For ...
journal_title:Comparative cytogenetics
pub_type: 杂志文章
doi:10.3897/CompCytogen.v10i4.10392
更新日期:2016-12-09 00:00:00
abstract::Agave Linnaeus, 1753 is endemic of America and is considered one of the most important crops in Mexico due to its key role in the country's economy. Cytogenetic analysis was carried out in Agave tequilana Weber, 1902 'Azul', Agave cupreata Trelease et Berger, 1915 and Agave angustifolia Haworth, 1812. The analysis sho...
journal_title:Comparative cytogenetics
pub_type: 杂志文章
doi:10.3897/CompCytogen.v7i3.5337
更新日期:2013-08-12 00:00:00
abstract::Chromosome counts and karyotype characterization have proved to be important features of a genome. Chromosome changes during the diversification of ants might play an important role, given the diversity and success of Formicidae. Comparative karyotype analyses on ants have enriched and helped ant systematics. Among le...
journal_title:Comparative cytogenetics
pub_type: 杂志文章
doi:10.3897/CompCytogen.v12i1.21799
更新日期:2018-01-09 00:00:00
abstract::Synaptonemal complex (SC) chains were revealed in semisterile intraspecific F1 hybrids of Ellobius tancrei Blasius, 1884 (2n = 49, NF=56 and 2n=50, NF=56), heterozygous for Robertsonian (Rb) translocations. Chains were formed by Rb submetacentrics with monobrachial homology. Chromosome synapsis in spermatocytes of the...
journal_title:Comparative cytogenetics
pub_type: 杂志文章
doi:10.3897/CompCytogen.v9i4.5674
更新日期:2015-12-02 00:00:00
abstract::Chromosome morphometry and nuclear DNA content are useful data for cytotaxonomy and for understanding the evolutionary history of different taxa. However, the chromosome number is the only karyotype aspect reported for the species of Dorstenia so far. In this study, the nuclear genome size of Dorstenia arifolia (Lamar...
journal_title:Comparative cytogenetics
pub_type: 杂志文章
doi:10.3897/CompCytogen.v10i1.6719
更新日期:2016-01-22 00:00:00
abstract::An extreme example of nonrandom rearrangements, especially inversion breaks, is described in the polytene chromosomes of the black fly Simulium bergi Rubtsov, 1956 from Armenia and Turkey. A total of 48 rearrangements was discovered, relative to the standard banding sequence for the subgenus Simulium Latreille, 1802. ...
journal_title:Comparative cytogenetics
pub_type: 杂志文章
doi:10.3897/CompCytogen.v10i2.8855
更新日期:2016-06-30 00:00:00
abstract::[This corrects the article DOI: 10.3897/CompCytogen.v11i1.10339.]. ...
journal_title:Comparative cytogenetics
pub_type: 杂志文章,已发布勘误
doi:10.3897/CompCytogen.v11i4.21560
更新日期:2017-12-08 00:00:00
abstract::Ninety individuals of the characid fish Astyanax fasciatus (Cuvier, 1819) were collected at Água da Madalena stream (Botucatu, São Paulo, Brazil) and analyzed for diploid chromosome number 2n and karyotype composition as well as for the chromosomal location of the 5S and 18S ribosomal DNA (rDNA). Whereas no chromosome...
journal_title:Comparative cytogenetics
pub_type: 杂志文章
doi:10.3897/CompCytogen.v6i1.2151
更新日期:2012-01-24 00:00:00
abstract::We describe the karyotype, location of nucleolus-organizing regions (NORs) and heterochromatin composition and distribution in Lepidochitona caprearum (Scacchi, 1836). The examined specimens had 2n=24 chromosomes; the elements of pairs 1-4 were metacentric, subtelocentric those of the fifth pair, telocentric the eleme...
journal_title:Comparative cytogenetics
pub_type: 杂志文章
doi:10.3897/CompCytogen.v6i4.3722
更新日期:2012-12-12 00:00:00
abstract::Cytogenetic features of the hangingfly Bittacus sinicus Issiki, 1931 were investigated for the first time using C-banding and DAPI (4',6-diamidino-2-phenylindole) staining. The karyotype analyses show that the male B. sinicus possesses the lowest chromosome number (2n = 15) ever observed in Mecoptera, and an almost sy...
journal_title:Comparative cytogenetics
pub_type: 杂志文章
doi:10.3897/CompCytogen.v14i3.53533
更新日期:2020-07-30 00:00:00
abstract::The ancient insect order Odonata is divided into three suborders: Anisoptera and Zygoptera with approximately 3000 species worldwide each, and Anisozygoptera with only four extant species in the relict family Epiophlebiidae. An updated list of Odonata species studied regarding chromosome number, sex chromosome mechani...
journal_title:Comparative cytogenetics
pub_type: 杂志文章,评审
doi:10.3897/CompCytogen.v14i4.57062
更新日期:2020-10-22 00:00:00
abstract::Previous cytogenetic analyses in Trypoxylon Latreille, 1796 have been basically restricted to C-banding. In the present study, base-specific CMA3 and DAPI fluorochrome staining were used to characterize the constitutive heterochromatin in three Trypoxylon species. The heterochromatin was GC-rich in all the species stu...
journal_title:Comparative cytogenetics
pub_type: 杂志文章
doi:10.3897/compcytogen.v5i2.961
更新日期:2011-07-01 00:00:00
abstract::Chromosome morphometry and nuclear DNA content are useful data for cytotaxonomy and to understand the evolutionary history of different taxa. For the genus Bromus Linnaeus, 1753, distinct ploidy levels have been reported, occurring from diploid to duodecaploid species. The geographic distribution of Bromus species has...
journal_title:Comparative cytogenetics
pub_type: 杂志文章
doi:10.3897/CompCytogen.v11i2.11572
更新日期:2017-04-07 00:00:00
abstract::[This corrects the article DOI: 10.3897/CompCytogen.v14i2.49513.]. ...
journal_title:Comparative cytogenetics
pub_type: 已发布勘误
doi:10.3897/CompCytogen.v14i4.56080
更新日期:2020-12-29 00:00:00
abstract::Phaneropterinae is the largest subfamily of Tettigoniidae, distributed across the globe. There are few cytogenetic studies regarding this group, as in the case of the genus group Aniarae, which represents only two karyotyped species. The current study aims to analyze cytogenetically three species of Hyperophora Brunne...
journal_title:Comparative cytogenetics
pub_type: 杂志文章
doi:10.3897/CompCytogen.v13i1.31803
更新日期:2019-04-02 00:00:00