Cytogenetic and taxonomic studies of some legless mealybugs (Homoptera, Coccinea, Pseudococcidae).

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

authors： Achrem M,Szućko I,Kalinka A

更新日期：2020-07-07 00:00:00

abstract：:Valeriana jatamansi, a medicinally important species of the family Valerianaceae, has been cytologically studied in different geographical areas of North-Western Himalayan region of India. The tetraploid cytotype with chromosome numbers 2n=32 is in conformity with the earlier reports of the species from different part...

journal_title：Comparative cytogenetics

authors： Rani S,Sharma TR,Kapila R,Chahota RK

更新日期：2015-08-07 00:00:00

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, v...

journal_title：Comparative cytogenetics

authors： Macháčková P,Majeský Ľ,Hroneš M,Hřibová E,Bohumil Trávníček,Vašut RJ

更新日期：2018-09-18 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

authors： Silva AA,Rocha MP,Ompolo SDG,Campos LAO,Tavares MG

更新日期：2018-11-09 00:00:00

abstract：:Immunocytochemical and electron microscopic analysis of synaptonemal complexes (SCs) was carried out for the first time in homozygotes and complex Robertsonian heterozygotes (hybrids) of the common shrew, Sorex araneus Linnaeus, 1758, from a newly discovered hybrid zone between the Moscow and the Neroosa chromosomal r...

journal_title：Comparative cytogenetics

authors： Matveevsky SN,Pavlova SV,Maret M Acaeva,Oxana L Kolomiets

更新日期：2012-09-14 00:00:00

abstract：:Several strains of the apparently well-known cosmopolitan synanthropic parasitoid of coleopteran stored-product pests, Lariophagusdistinguendus (Förster, 1841) from Western Europe, were studied using DNA sequencing and chromosomal analysis. The presence of at least two cryptic species with different COI sequences and ...

journal_title：Comparative cytogenetics

authors： König C,Paschke S,Pollmann M,Reinisch R,Gantert C,Weber J,Krogmann L,Steidle JLM,Gokhman VE

更新日期：2019-06-11 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

authors： Bonasora MG,Poggio L,Greizerstein EJ

更新日期：2013-03-26 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

authors： Chahota RK,Mukai Y,Chaudhary HK,Kishore N,Sharma TR

更新日期：2011-11-09 00:00:00

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

authors： do Nascimento EFMB,Dos Santos BV,Marques LOC,Guimarães PM,Brasileiro ACM,Leal-Bertioli SCM,Bertioli DJ,Araujo ACG

更新日期：2018-03-14 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

authors： Ferreira-Neto M,Artoni RF,Vicari MR,Moreira-Filho O,Camacho JP,Bakkali M,de Oliveira C,Foresti F

更新日期：2012-01-24 00:00:00

abstract：:Next-generation sequencing data analysis on Triatoma infestans Klug, 1834 (Heteroptera, Cimicomorpha, Reduviidae) revealed the presence of the ancestral insect (TTAGG)n telomeric motif in its genome. Fluorescence in situ hybridization confirms that chromosomes bear this telomeric sequence in their chromosomal ends. Fu...

journal_title：Comparative cytogenetics

authors： Pita S,Panzera F,Mora P,Vela J,Palomeque T,Lorite P

更新日期：2016-09-13 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

authors： Sadílek D,Sťáhlavský F,Vilímová J,Zima J

更新日期：2013-10-03 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

authors： Petraccioli A,Maio N,Odierna G

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

authors： Miao Y,Hua BZ

更新日期：2020-07-30 00:00:00

abstract：:The genus Pseudophoxinus Bleeker, 1860 is found in a wide range of habitats in central Anatolia, but it is not well known from a cytogenetic aspect. In this study the first karyotypic description of the spring minnows Pseudophoxinuscrassus (Ladiges, 1960) and Pseudophoxinushittitorum Freyhof & Özulug, 2010 by means of...

journal_title：Comparative cytogenetics

authors： Unal S,Gaffaroğlu M,Ayata MK,Yüksel E

更新日期：2014-10-31 00:00:00

abstract：:[This corrects the article DOI: 10.3897/CompCytogen.v14i2.49513.]. ...

journal_title：Comparative cytogenetics

authors： Goes CAG,Daniel SN,Piva LH,Yasui GS,Artoni RF,Hashimoto DT,Foresti F,Porto-Foresti F

更新日期：2020-12-29 00:00:00

abstract：:We report the karyotype, some aspects of spermatogenesis, and ovarian trophocytes ploidy in three aquatic bug species: Ilyocoris cimicoides (Linnaeus, 1758), Notonecta glauca Linnaeus, 1758, and Diplonychus rusticus Fabricius, 1871 from previously unexplored regions - South Europe (Bulgaria) and Southeast Asia (Vietna...

journal_title：Comparative cytogenetics

authors： Stoianova D,Simov N,Vu MQ,Nguyen DM,Grozeva S

更新日期：2020-03-05 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

authors： Angus RB,Angus EM,Jia F,Chen ZN,Zhang Y

更新日期：2015-03-31 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

authors： Matveevsky S,Bakloushinskaya I,Tambovtseva V,Romanenko S,Kolomiets O

更新日期：2015-12-02 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

authors： Menezes RS,Carvalho AF,Silva JG,Costa MA

更新日期：2011-07-01 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

authors： Amaral-Silva PM,Clarindo WR,Carrijo TT,Carvalho CR,Praça-Fontes MM

更新日期：2016-01-22 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

authors： Artico LL,Mazzocato AC,Ferreira JL,Carvalho CR,Clarindo WR

更新日期：2017-04-07 00:00:00

abstract：:The karyotypes and the localization of C-bands, clusters of ribosomal DNA and telomeric repeats of 10 species of the family Pamphagidae from Morocco are described for the first time. The species studied belong to the subfamilies Pamphaginae and Thrinchinae. All species have karyotypes consisting of 19 and 20 acrocentr...

journal_title：Comparative cytogenetics

authors： Buleu OG,Jetybayev IY,Chobanov DP,Bugrov AG

更新日期：2019-02-27 00:00:00

abstract：:The B chromosome in the hylid Hypsiboas albopunctatus (2n = 22 + B) is small, almost entirely composed of C-positive heterochromatin, and does not pair with any chromosome of the A complement. B probe, obtained by microdissection and DOP-PCR amplification, was used to search for homology between the B and regular chro...

journal_title：Comparative cytogenetics

authors： Gruber SL,Diniz D,Sobrinho-Scudeler PE,Fausto Foresti,Haddad CF,Kasahara S

更新日期：2014-08-08 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

authors： Petrova NA,Cornette R,Shimura S,Gusev OA,Pemba D,Kikawada T,Zhirov SV,Okuda T

更新日期：2015-05-11 00:00:00

abstract：:This article provides an overview of research on chromatin diminution (CD) in copepods. The phenomenology, mechanisms and biological role of CD are discussed. A model of CD as an alternative means of regulating cell differentiation is presented. While the vast majority of eukaryotes inactivate genes that are no longer...

journal_title：Comparative cytogenetics

authors： Grishanin A

更新日期：2014-01-09 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

authors： Bertollo LAC,Cioffi MB,Galetti PM Jr,Filho OM

更新日期：2017-10-20 00:00:00

abstract：:In the present study, we analyzed individuals of Hypostomus soniae (Loricariidae) collected from the Teles Pires River, southern Amazon basin, Brazil. Hypostomus soniae has a diploid chromosome number of 2n = 64 and a karyotype composed of 12 metacentric (m), 22 submetacentric (sm), 14 subtelocentric (st), and 16 acro...

journal_title：Comparative cytogenetics

authors： de Oliveira LC,Ribeiro MO,Costa GM,Zawadzki CH,Prizon-Nakajima AC,Borin-Carvalho LA,Martins-Santos IC,Portela-Castro ALB

更新日期：2019-12-11 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

authors： Pereira TTP,Dos Reis ACCC,Cardoso DC,Cristiano MP

更新日期：2018-01-09 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

authors： da Silva KR,Mariotto S,Centofante L,Parise-Maltempi PP

更新日期：2017-01-20 00:00:00