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Abstract:

Three B-containing individuals of Dichroplus pratensis were found among 300 males collected in several Argentine localities. The B-chromosome is a partially euchromatic short telocentric and it is mitotically unstable. The B-chromosome number of testis cells ranged from 0 to 4 in two males and from 0 to 3 in the remaining one; this variation was inter- as well as intrafollicular. Meiotic behaviour of the Bs was very regular, association of Bs was usually chiasmate and no lagging univalents were observed during first division. The presence of Bs increased the production rate of abnormal spermatids and this effect was more pronounced in follicles with odd numbers of Bs. Chiasma frequency and between-cell variance were also increased in B-containing cells. A possible interaction between the Bs and the polymorphic centric fusions present in the species is discussed in relation to chiasma frequency determination. © 1987 Dr W. Junk Publishers.

Registro:

Documento: Artículo
Título:Influence of a rare unstable B-chromosome on chiasma frequency and nonhaploid sperm production in Dichroplus pratensis (Melanoplinae, Acrididae)
Autor:Bidau, C.J.
Filiación:Laboratorio de Genética, Departamento de Ciencias Biológicas, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Buenos Aires, 1428, Argentina
Año:1987
Volumen:73
Número:3
Página de inicio:201
Página de fin:210
DOI: http://dx.doi.org/10.1007/BF00055275
Título revista:Genetica
Título revista abreviado:Genetica
ISSN:00166707
CODEN:GENEA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00166707_v73_n3_p201_Bidau

Referencias:

  • Bidau, C. J., 1984. Estudios citogenéticos en Orthoptera de Sudamérica. Ph.D. Thesis, Universidad de Buenos Aires; Bidau, C.J., A nucleolar-organizing B chromosome showing segregation-distortion in the grasshopper Dichroplus pratensis (Melanoplinae, Acrididae) (1986) Canadian Journal of Genetics and Cytology, 28, pp. 138-148
  • Bidau, C.J., Effects on cytokinesis and sperm formation of a B-isochromosome in Metaleptea brevicornis adspersa (Acridinae, Acrididae) (1986) Caryologia, 39, pp. 165-177
  • Bidau, C. L., 1986c. Geographic distributions of chromosome polymorphisms in Dichroplus pratensis Bruner (Melauoplinae, Aoudidae) in Argentina. Proc. 4th Trienn. Meeting, Pan Amer. Acridol. Soc. 165–166; Bidau, C. J. & Confalonieri, V. A., 1986. A cytophotometric study of micro- and macrospermatids in three species of grasshoppers (Acrididae) Cytobios (in press); Confalonieri, V.A., Bidau, C.J., The B-chromosomes of two species of Cylindrotettix (Leptysminae, Acrididae) (1986) Genetica, 68, pp. 87-95
  • Gosálvez, J., García de la Vega, C., Rufas, J. S. & López-Fernández, C., 1985. Unstable B-chromosomes producing abnormal spermatid nuclei in Sphingonotus coerulans (Orthoptera). Arch. Biol. 96 (in press); Hewitt, G.M., Variable transmission rates of a B-chromosome in Myrmeleotettix maculatus (Thunb.) (Acrididae, Orthoptera) (1973) Chromosoma, 40, pp. 83-106
  • Hewitt, G.M., Orthoptera (1979) Animal cytogenetics 3. Insecta 1, , B., John, Borntraeger, Berlin-Stuttgart
  • John, B., Henderson, S.A., Asynapsis and polyploidy in Schistocerca paranensis (1962) Chromosoma, 13, pp. 111-147
  • Jones, R.N., Rees, H., (1982) B chromosomes, , Academic Press, London-New York
  • Nur, U., Mitotic instability leading to an accumulation of B-chromosomes in grasshoppers (1969) Chromosoma, 52, pp. 137-148
  • Rothfels, K., Procunier, B., The B-chromosomes of Neopodismopsis abdominalis (Orthoptera: Acrididae) (1975) Chromosoma, 52, pp. 137-148
  • Suja, J. A., Gosálvez, J., López-Fernández, C. & Rufas, J. S., 1985. A cytogenetic analysis in Psophus stridulus (Orthoptera: Acrididae). B-chromosomes and abnormal spermatid nuclei. Genetica (in press); Suja, J. A., García de la Vega, C. & Rufas, J. S., 1986. Meiotic stability of B-chromosomes and production of macrospermatids in Aiolopus strepens (Orthoptera: Acrididae). (Submitted); White, M. J. D., 1973. Animal cytology and evolution. 3rd Ed. Cambridge Univ. Press

Citas:

---------- APA ----------
(1987) . Influence of a rare unstable B-chromosome on chiasma frequency and nonhaploid sperm production in Dichroplus pratensis (Melanoplinae, Acrididae). Genetica, 73(3), 201-210.
http://dx.doi.org/10.1007/BF00055275
---------- CHICAGO ----------
Bidau, C.J. "Influence of a rare unstable B-chromosome on chiasma frequency and nonhaploid sperm production in Dichroplus pratensis (Melanoplinae, Acrididae)" . Genetica 73, no. 3 (1987) : 201-210.
http://dx.doi.org/10.1007/BF00055275
---------- MLA ----------
Bidau, C.J. "Influence of a rare unstable B-chromosome on chiasma frequency and nonhaploid sperm production in Dichroplus pratensis (Melanoplinae, Acrididae)" . Genetica, vol. 73, no. 3, 1987, pp. 201-210.
http://dx.doi.org/10.1007/BF00055275
---------- VANCOUVER ----------
Bidau, C.J. Influence of a rare unstable B-chromosome on chiasma frequency and nonhaploid sperm production in Dichroplus pratensis (Melanoplinae, Acrididae). Genetica. 1987;73(3):201-210.
http://dx.doi.org/10.1007/BF00055275