Results 31 to 40 of about 286 (125)

Mitotic and meiotic behaviour of axial core structure of holokinetic chromosomes

Hereditas, 2008
The location of axial core structure in mitotic and meiotic holokinetic chromosomes was studied. In mitotic chromosomes, axial core structure was found to be located laterally in the chromatid, while in meiotic chromosomes, axial core structure was located centrally in the chromatid.
SEPPO NOKKALA, CHRISTINA NOKKALA
openaire   +1 more source

Evolutionary pattern of karyotypes and meiosis in pholcid spiders (Araneae: Pholcidae): implications for reconstructing chromosome evolution of araneomorph spiders

BMC Ecology and Evolution, 2021
Background Despite progress in genomic analysis of spiders, their chromosome evolution is not satisfactorily understood. Most information on spider chromosomes concerns the most diversified clade, entelegyne araneomorphs.
Ivalú M. Ávila Herrera, Jiří Král, Markéta Pastuchová, Martin Forman, Jana Musilová, Tereza Kořínková, František Šťáhlavský, Magda Zrzavá, Petr Nguyen, Pavel Just, Charles R. Haddad, Matyáš Hiřman, Martina Koubová, David Sadílek, Bernhard A. Huber   +14 more
doaj   +1 more source

Meiosis and fluorescent banding in Edessa meditabunda and E. rufomarginata (Heteroptera: Pentatomidae: Edessinae)

European Journal of Entomology, 2003
Species of Pentatomidae are cytogenetically characterized by the presence of holokinetic chromosomes, a pre-reductional type of meiosis, and a great constancy not only in chromosome number (2n = 14 in 85% of the 250 species analyzed) but also in the sex ...
Pablo J. REBAGLIATI, Alba G. PAPESCHI, Liliana M. MOLA   +2 more
doaj   +1 more source

Karyotype diversity among predatory Reduviidae (Heteroptera)

Comparative Cytogenetics, 2014
Species of infraorder Cimicomorpha of Heteroptera exhibit holokinetic chromosomes with inverted meiosis for sex chromosomes and high variation in chromosome number.
Vanessa Bellini Bardella, Hélcio Reinaldo Gil-Santana, Francisco Panzera, André Luís Laforga Vanzela   +3 more
doaj   +1 more source

First cytogenetic study of Coleorrhyncha: Meiotic complement of Xenophyes cascus (Hemiptera: Peloridiidae)

European Journal of Entomology, 2014
Cytogenetic information on the hemipteran suborder Coleorrhyncha is here provided for the first time. The New Zealand peloridiid species, Xenophyes cascus Bergroth, 1924 (Hemiptera: Coleorrhyncha: Peloridiidae), was found to display testes with a single ...
Snejana GROZEVA, Valentina KUZNETSOVA, Viktor HARTUNG   +2 more
doaj   +1 more source

Meiotic Analysis of Gomphidae Species Sheds Light on the Large X Chromosome of the Family (Anisoptera, Odonata)

Diversity, 2022
In most Anisoptera families, the modal diploid number is 25 in males (24 autosomes + X), and the X chromosome is one of the smallest elements of the complement.
Liliana M. Mola, Pablo J. Rebagliati, María F. Fourastié, Silvia S. Agopian   +3 more
doaj   +1 more source

Heterozygosity and Chain Multivalents during Meiosis Illustrate Ongoing Evolution as a Result of Multiple Holokinetic Chromosome Fusions in the Genus Melinaea (Lepidoptera, Nymphalidae). [PDF]

Cytogenetic and genome research, 2018
Mitotic and meiotic chromosomes from 2 taxa of the genus Melinaea, M. satevis cydon and M. "satevis" tarapotensis (Lepidoptera: Nymphalidae), and from hybrids produced in captivity were obtained using an improved spreading technique and were subsequently analyzed. In one of the taxa, the presence of trivalents and tetravalents at diakinesis/metaphase I
Mcclure, Melanie, Dutrillaux, Bernard, Dutrillaux, Anne-Marie, Lukhtanov, Vladimir, Elias, Marianne   +4 more
openaire   +3 more sources

Chromosomal location of heterochromatin and 45S rDNA sites in four South American triatomines (Heteroptera: Reduviidae)

Comparative Cytogenetics, 2010
The Triatominae are distributed in Brazilian regions and are the vector of Chagas disease. This group is also characterized by lower karyotype variability, occurrence of holokinetic chromosomes and inverted meiosis of the sex chromosomes.
Vanessa Bardella, Vanessa Bardella, M Gaeta, A Vanzela, M Azeredo-Oliveira   +4 more
doaj   +1 more source

Comparative Meiotic Studies in Triatoma sordida (Stål) and T. guasayana Wygodzinsky & Abalos (Reduviidae, Heteroptera)

Memorias do Instituto Oswaldo Cruz, 1998
Triatoma sordida and T. guasayana are competent Trypanosoma cruzi vectors, with overlapping distribution areas in Argentina. Both species are morphologically similar, and their immature stages are hard to discriminate.
P Rebagliati, AG Papeschi, LM Mola, S Pietrokovsky, P Gajate, V Bottazzi, C Wisnivesky-Colli   +6 more
doaj   +1 more source

Cytogenetic analysis on geographically distant parthenogenetic populations of Tityus trivittatus Kraepelin, 1898 (Scorpiones, Buthidae): karyotype, constitutive heterochromatin and rDNA localization

Comparative Cytogenetics, 2014
Tityus trivittatus Kraepelin, 1898 is the most medically important scorpion species of Argentina, and parthenogenetic populations are present in the major cities of this country.
Renzo Sebastián Adilardi, Andres Ojanguren Affilastro, Dardo Marti, Liliana Mola   +3 more
doaj   +1 more source