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Abstract:

Spontaneous centric fusions were detected in two natural populations, Raco (RA) and Tafi Viejo (TV), of Dichroplus elongatus from Tucuman Province (Argentina). In TV one male carried centric fusion between autosomes L3 and M4 (3/4 fusion). One male from RA showed two centric fusions, one between the X and M5 (X/5) and the other between autosomes L1 and M4 (1/4) (in homozygous condition). A significant reduction in the number of chiasmata in the fused bivalents or trivalents with respect to standard karyotypes was observed in all cases except the M4 arm of the 1/4 fusion. Significant chiasma redistribution towards more distal positions was observed in the L1 arm of the 1/4 fusion, the L3 arm of the 3/4 fusion and the L5 arm of the X/5 fusion. These results revealed that a) some fusions per se may affect chiasma conditions, b) the intensity of such effect varies among chromosome pairs.

Registro:

Documento: Artículo
Título:Spontaneous centric fusions affecting chiasma conditions in Dichroplus elongatus (Orthoptera)
Autor:Clemente, M.; Remis, M.I.; Vilardi, J.C.
Filiación:Depto. Ciencias Biológicas, Fac.Cs Exactas y Naturales, Universidad de Buenos Aires, Argentina
Carrera Investigador Cie. y Tecn., CONICET, Argentina
Palabras clave:centric fusion; chiasmata; grasshopper; spontaneous chromosome mutations; Dichroplus elongatus; Orthoptera
Año:1996
Volumen:61
Número:2
Página de inicio:155
Página de fin:162
DOI: http://dx.doi.org/10.1508/cytologia.61.155
Título revista:Cytologia
Título revista abreviado:CYTOLOGIA
ISSN:00114545
CODEN:CYTOA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00114545_v61_n2_p155_Clemente

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Citas:

---------- APA ----------
Clemente, M., Remis, M.I. & Vilardi, J.C. (1996) . Spontaneous centric fusions affecting chiasma conditions in Dichroplus elongatus (Orthoptera). Cytologia, 61(2), 155-162.
http://dx.doi.org/10.1508/cytologia.61.155
---------- CHICAGO ----------
Clemente, M., Remis, M.I., Vilardi, J.C. "Spontaneous centric fusions affecting chiasma conditions in Dichroplus elongatus (Orthoptera)" . Cytologia 61, no. 2 (1996) : 155-162.
http://dx.doi.org/10.1508/cytologia.61.155
---------- MLA ----------
Clemente, M., Remis, M.I., Vilardi, J.C. "Spontaneous centric fusions affecting chiasma conditions in Dichroplus elongatus (Orthoptera)" . Cytologia, vol. 61, no. 2, 1996, pp. 155-162.
http://dx.doi.org/10.1508/cytologia.61.155
---------- VANCOUVER ----------
Clemente, M., Remis, M.I., Vilardi, J.C. Spontaneous centric fusions affecting chiasma conditions in Dichroplus elongatus (Orthoptera). CYTOLOGIA. 1996;61(2):155-162.
http://dx.doi.org/10.1508/cytologia.61.155