Results 21 to 30 of about 286 (125)

Sex-Linked Chromosome Heterozygosity in Males of Tityus confluens (Buthidae): A Clue about the Presence of Sex Chromosomes in Scorpions. [PDF]

PLoS ONE, 2016
Scorpions of the genus Tityus show holokinetic chromosomes, achiasmatic male meiosis and an absence of heteromorphic sex chromosomes, like all Buthidae. In this work, we analysed the meiotic behaviour and chromosome rearrangements of a population of the ...
Renzo Sebastián Adilardi, Andrés Alejandro Ojanguren-Affilastro, Liliana María Mola   +2 more
doaj   +1 more source

Cytogenetics of the true bug infraorder Cimicomorpha (Hemiptera, Heteroptera): a review

ZooKeys, 2011
The Cimicomorpha is one of the largest and highly diversified infraorders of the Heteroptera. This group is also highly diversified cytogenetically and demonstrates a number of unusual cytogenetic characters such as holokinetic chromosomes; m-chromosomes;
Valentina Kuznetsova, Snejana Grozeva, Seppo Nokkala, Christina Nokkala   +3 more
doaj   +1 more source

Chromosome complement and meiosis in three species of the Neotropical bug genus Antiteuchus (Heteroptera, Pentatomidae, Discocephalinae)

Genetics and Molecular Biology, 2006
Orcein staining of spermatocytes was used to study the meiotic behavior of holocentric chromosomes in three member of the genus Antiteuchus (commonly known as stink bugs). We describe and illustrate the karyotype of Antiteuchus mixtus, A. sepulcralis and
Cecilia Lanzone, Maria José de Souza
doaj   +1 more source

Karyotype and male meiosis in Spartocera batatas and meiotic behaviour of multiple sex chromosomes in Coreidae (Heteroptera)

European Journal of Entomology, 2006
The Coreidae (Heteroptera) have holokinetic chromosomes and during male meiosis the autosomal bivalents segregate reductionally at anaphase I while the sex chromosomes do so equationally. The modal diploid chromosome number of the family is 2n = 21, with
María José FRANCO, María José BRESSA, Alba GRACIELA PAPESCHI   +2 more
doaj   +1 more source

Kinetic activity of the sex chromosomes of Mormidea paupercula (Heteroptera: Pentatomidae)

European Journal of Entomology, 2010
In Mormidea paupercula (n = 6 + XY in males), the presence of a CMA3-bright band in the telomeric regions on both sex chromosomes allowed the analysis of the kinetic activity of the sex univalents and XY pseudobivalent at the first and second meiotic ...
Pablo Javier REBAGLIATI, Liliana María MOLA   +1 more
doaj   +1 more source

Cytogenetic studies on Mepraia gajardoi (Heteroptera: Reduviidae). Chromosome behaviour in a spontaneous translocation mutant

European Journal of Entomology, 2004
We analysed the chromosome complement and male meiosis in a natural population of Mepraia gajardoi (Hemiptera: Reduviidae: Triatominae). The normal karyotype of this species is 20 autosomes plus X1X2Y in males and X1X1X2X2 in females. We confirmed that M.
Ruben PÉREZ, Lucia CALLEROS, Virginia ROSE, Myriam LORCA, Francisco PANZERA   +4 more
doaj   +1 more source

Extensive conserved synteny of genes between the karyotypes of Manduca sexta and Bombyx mori revealed by BAC-FISH mapping. [PDF]

PLoS ONE, 2009
BACKGROUND: Genome sequencing projects have been completed for several species representing four highly diverged holometabolous insect orders, Diptera, Hymenoptera, Coleoptera, and Lepidoptera. The striking evolutionary diversity of insects argues a need
Yuji Yasukochi, Makiko Tanaka-Okuyama, Fukashi Shibata, Atsuo Yoshido, Frantisek Marec, Chengcang Wu, Hongbin Zhang, Marian R Goldsmith, Ken Sahara   +8 more
doaj   +1 more source

Restriction of kinetic activity of holokinetic chromosomes in meiotic cells and its structural basis [PDF]

Hereditas, 2008
Kinetic behaviour of autosomes in meiotic cells of Myrmus miriformis Fn. (Corizidae, Hemiptera) was followed by using a naturally occurring satellite-like element to mark one telomere of an autosome. It was found that the telomere, being kinetically active during the first meiotic division, is kinetically inactive during the second division, suggesting
openaire   +2 more sources

Cytogenetic and molecular characterization of the MBSAT1 satellite DNA in holokinetic chromosomes of the cabbage moth, Mamestra brassicae (Lepidoptera) [PDF]

Chromosome Research, 2003
Digestion of Mamestra brassicae DNA with DraI produced a prominent fragment of approximately 200 bp and a ladder of electrophoretic bands with molecular weights which are a multiple of 200 bp. Southern blotting revealed that this ladder is composed of DNA fragments that are multimers of the 200-bp DraI band suggesting that DraI isolated a satellite ...
MANDRIOLI, Mauro, MANICARDI, Gian Carlo, F. Marec   +2 more
openaire   +3 more sources

Cytogenetic characterization of periodical cicadas (Hemiptera: Cicadidae: Magicicada)

European Journal of Entomology, 2020
The periodical cicadas of the genus Magicicada Davis, 1925 inhabiting eastern United States are characterized by a long juvenile period of 17 or 13 years and periodical mass emergence of adults. In this genus, only seven species are distinguished and are
Gayane KARAGYAN, Natalia GOLUB, Teiji SOTA   +2 more
doaj   +1 more source