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Abstract:

Heteropteran chromosomes are holokinetic; during mitosis, sister chromatids segregate parallel to each other but, during meiosis, kinetic activity is restricted to one pair of telomeric regions. This meiotic behaviour has been corroborated for all rod bivalents. For ring bivalents, we have previously proposed that one of the two chiasmata releases first, and a telokinetic activity is also achieved. In the present work we analyse the meiotic behaviour of ring bivalents in Pachylis argentinus (Coreidae) and Nezara viridula (Pentatomidae) and we describe for the first time the chromosome complement and male meiosis of the former (2n = 12 + 2m + X0, pre-reduction of the X). Both species possess a large chromosome pair with a secondary constriction which is a nucleolus organizer region as revealed by in-situ hybridization. Here we propose a new mode of segregation for ring bivalents: when the chromosome pair bears a secondary constriction, it is not essential that one of the chiasmata releases first since these regions or repetitive DNA sequences adjacent to them become functional as alternative sites for microtubule attachment and they undertake chromosome segregation to the poles during anaphase I.

Registro:

Documento: Artículo
Título:Behaviour of ring bivalents in holokinetic systems: Alternative sites of spindle attachment in Pachylis argentinus and Nezara viridula (Heteroptera)
Autor:Papeschi, A.G.; Mola, L.M.; Bressa, M.J.; Greizerstein, E.J.; Lía, V.; Poggio, L.
Filiación:Lab. de Citogenética y Evol., Depto. de Ecologia, Genet. y Evol., Ciudad Universitaria, Cd. Autónoma de Buenos Aires, Argentina
Cátedra de Citologia, Fac. de Ciencias Naturales y Museo, UNLP (1900), La Plata, Argentina
Palabras clave:Fluorescent in-situ hybridization; Heteroptera; Holokinetic chromosomes; Meiosis; Ring bivalents; Spindle attachment sites; repetitive DNA; anaphase; article; centromere; chromatin condensation; chromosome analysis; chromosome bivalent; chromosome chiasm; chromosome NOR; chromosome pairing; chromosome segregation; chromosome structure; DNA sequence; female; gene location; Heteroptera; in situ hybridization; male; meiosis; microtubule; mitosis; Nezara viridula; nonhuman; Pachylis argentinus; priority journal; sister chromatid; species difference; telomere; Anaphase; Animals; Female; Heteroptera; Male; Meiosis; Metaphase; Mitotic Spindle Apparatus; Models, Biological; Nucleolus Organizer Region; Prophase; Sex Chromosomes; Spermatocytes; Arachnida; Coreidae; Heteroptera; Hexapoda; Invertebrata; Nezara viridula; Pachylis argentinus; Pentatomidae
Año:2003
Volumen:11
Número:8
Página de inicio:725
Página de fin:733
DOI: http://dx.doi.org/10.1023/B:CHRO.0000005740.56221.03
Título revista:Chromosome Research
Título revista abreviado:Chromosome Res.
ISSN:09673849
CODEN:CRRSE
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09673849_v11_n8_p725_Papeschi

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Citas:

---------- APA ----------
Papeschi, A.G., Mola, L.M., Bressa, M.J., Greizerstein, E.J., Lía, V. & Poggio, L. (2003) . Behaviour of ring bivalents in holokinetic systems: Alternative sites of spindle attachment in Pachylis argentinus and Nezara viridula (Heteroptera). Chromosome Research, 11(8), 725-733.
http://dx.doi.org/10.1023/B:CHRO.0000005740.56221.03
---------- CHICAGO ----------
Papeschi, A.G., Mola, L.M., Bressa, M.J., Greizerstein, E.J., Lía, V., Poggio, L. "Behaviour of ring bivalents in holokinetic systems: Alternative sites of spindle attachment in Pachylis argentinus and Nezara viridula (Heteroptera)" . Chromosome Research 11, no. 8 (2003) : 725-733.
http://dx.doi.org/10.1023/B:CHRO.0000005740.56221.03
---------- MLA ----------
Papeschi, A.G., Mola, L.M., Bressa, M.J., Greizerstein, E.J., Lía, V., Poggio, L. "Behaviour of ring bivalents in holokinetic systems: Alternative sites of spindle attachment in Pachylis argentinus and Nezara viridula (Heteroptera)" . Chromosome Research, vol. 11, no. 8, 2003, pp. 725-733.
http://dx.doi.org/10.1023/B:CHRO.0000005740.56221.03
---------- VANCOUVER ----------
Papeschi, A.G., Mola, L.M., Bressa, M.J., Greizerstein, E.J., Lía, V., Poggio, L. Behaviour of ring bivalents in holokinetic systems: Alternative sites of spindle attachment in Pachylis argentinus and Nezara viridula (Heteroptera). Chromosome Res. 2003;11(8):725-733.
http://dx.doi.org/10.1023/B:CHRO.0000005740.56221.03