Results 41 to 50 of about 2,412 (170)

The significance of cytogenetics for the study of karyotype evolution and taxonomy of water bugs (Heteroptera, Belostomatidae) native to Argentina [PDF]

, 2013
Male meiosis behaviour and heterochromatin characterization of three big water bug species were studied. Belostoma dentatum (Mayr, 1863), B. elongatum Montandon, 1908 and B. gestroi Montandon, 1903 possess 2n = 26 + X1X2Y (male).
Bressa, Maria Jose, Chirino, Monica Gabriela, Papeschi, Alba Graciela   +2 more
core   +2 more sources

Karyotype evolution in progress: A new diploid number in Belostoma candidulum (Heteroptera: Belostomatidae) from Argentina leading to new insights into its ecology and evolution [PDF]

, 2014
A novel chromosome complement (2n = 14 = 12 + XY/XX; male/female sex chromosomes), male meiosis behaviour, heterochromatin characterization, and frequency and distribution of chiasmata are described for the first time in specimens from a natural ...
Bressa, Maria Jose, Chirino, Monica Gabriela   +1 more
core   +1 more source

Holocentric Chromosomes of Luzula elegans Are Characterized by a Longitudinal Centromere Groove, Chromosome Bending, and a Terminal Nucleolus Organizer Region [PDF]

, 2011
The structure of holocentric chromosomes was analyzed in mitotic cells of Luzula elegans. Light and scanning electron microscopy observations provided evidence for the existence of a longitudinal groove along each sister chromatid.
A. Houben, Albertson DG, Albertson DG, Allshire RC, Bizzaro D, Black BE, Black BE, Black BE, Braselton JP, Buchwitz BJ, Carroll CW, Cattani MV, Comings DE, Cox AV, da Silva CR, Dernburg AF, Desai A, E. Schroeder-Reiter, Earnshaw WC, Fuchs J, Fukova I, G. Wanner, Gerlach WL, Guerra M, Guerra M, Houben A, Howe M, K. Kumke, K. Nagaki, Kato A, Kitagawa R, L. Ma, M. Murata, Maddox PS, Madej A, Mandakova T, Mandrioli M, Martin R, Moore LL, Nagaki K, Papeschi AG, Pimpinelli S, Raska I, Rebagliati PJ, S. Heckmann, Schneider MC, Schroeder-Reiter E, Sekulic N, Sullivan KF, Valarik M, Vanzela ALL, Vanzela ALL, Viera A, Wanner G   +53 more
core   +1 more source

Epigenetic histone marks of extended meta-polycentric centromeres of Lathyrus and Pisum chromosomes

Frontiers in Plant Science, 2016
Species of the legume genera Lathyrus and Pisum possess chromosomes that exhibit a unique structure of their centromeric regions, which is clearly apparent during metaphase by the formation of extended primary constrictions which span up to a third of ...
Pavel eNeumann, Veit eSchubert, Iva eFuková, Jasper Eugene Manning, Andreas eHouben, Jiri eMacas   +5 more
doaj   +1 more source

Chromosome Segregation Is Biased by Kinetochore Size [PDF]

, 2018
Chromosome missegregation during mitosis or meiosis is a hallmark of cancer and the main cause of prenatal death in humans. The gain or loss of specific chromosomes is thought to be random, with cell viability being essentially determined by selection ...
Aguiar, P, Almeida, A C, Damas, J, Drpic, D, Khodjakov, A, Larkin, D M, Lewin, H A, Maiato, H, Renda, F   +8 more
core   +2 more sources

Unique territorial and compartmental organization of chromosomes in the holocentric silkmoth

, 2023
Abstract The hallmarks of chromosome organization in multicellular eukaryotes are chromosome territories (CT), chromatin compartments, and insulated domains, including topologically associated domains (TADs). Yet, most of these elements of chromosome organization are derived from analyses of a limited set of model organisms, while large ...
J. Gil, E. Navarrete, C. Hockens, N. Chowdhury, S. Abraham, G. Cornilleau, E.P. Lei, J. Mozziconacci, E.J. Banigan, L.F. Rosin, L.A. Mirny, H. Muller, I.A. Drinnenberg   +12 more
openaire   +3 more sources

Spermatogenesis and nucleolar activity in Triatoma klugi (triatomine, Heteroptera)

Genetics and Molecular Biology, 2008
Triatoma klugi is a Chagas disease vector in the Rio Grande do Sul State. Triatominae chromosomes are holocentric and sex chromosomes segregation is post-reductional. In this paper we describe the karyotype of male T.
Laiana Cristina da Costa, Maria Tercília Vilela de Azeredo-Oliveira, Ester Tartarotti   +2 more
doaj   +1 more source

Cytogenetic characterization of telomeres in the holocentric chromosomes of the lepidopteran Mamestra brassicae [PDF]

, 2002
Telomeres of the Mamestra brassica holocentric chromosomes were studied by Southern blotting, in-situ hybridization and Bal31 assay evidencing the presence of the telomeric (TTAGG)(n) repeat.
MANDRIOLI, Mauro
core   +1 more source

Karyotype rearrangements and telomere analysis in Myzus persicae (Hemiptera, Aphididae) strains collected on Lavandula sp. plants [PDF]

, 2014
Karyotype analysis of nine strains of the peach-potato aphid Myzus persicae (Sulzer, 1776), collected on Lavandula sp. plants, evidenced showed that five of them had a standard 2n = 12 karyotype, one possessed a fragmentation of the X chromosome ...
F. Zanasi, MANDRIOLI, Mauro, MANICARDI, Gian Carlo   +2 more
core   +7 more sources

Cytogenetics as a tool for Triatomine species distinction (Hemiptera-Reduviidae)

Memorias do Instituto Oswaldo Cruz, 1992
Several cytogenetic traits were tested a species diagnostic characters on five triatomine species: Rhodnius pictipes, R. nasutus, R. robustus, Triatoma matogrossensis and T. pseudomaculata. Four of them are described for the first time.
Ruben Perez, Yanina Panzera, Sandra Scafiezzo, Maria Cristina Mazzella, Francisco Panzera, Jean Pierre Dujardin, Ekaterina Scvortzoff   +6 more
doaj   +1 more source