Polytene chromosomes of Anopheles atroparvus were treated with Barium hydroxide and 2 x SSC followed by Giemsa staining. The banding pattern of the sex chromosome and some autosome segments showed a dramatic change. One can in fact observe two kinds of modifications: first, some bands, independently of their thickness, stain more darkly than others, and after chemical treatment tend to lose, at least partially, their affinity for Giemsa; secondly, some band-interband segments stain uniformly, forming new bands not identifiable in the normal banding-pattern. Moreover some bands tend to split into smaller subunits. The modifications described are more marked in the sex chromosome. The results are discussed.
Referenze Bibliografiche
ARRIGHI F. E. e HSU T. C. (1971) - «Cytogenetics», 10, 81-86.
BARR H. J. e ELLISON J. R. (1972) - «Chromosoma», 39, 53-61.
BEDO D. G. (1975) - «Chromosoma», 51, 291-300.
BRIDGES C. B. (1941) - «Journ. Hered.», 32, 299-300.
BROWN S. W. (1966) - «Science», 151, 417-425.
DI LORENZO C., FALCHI A., GHIANI P. e MEZZANOTTE R. (1975) - «Rassegna Medica Sarda», 78, 417-426.
FARCI A., LAUDANI U. e LECIS A. R. (1973) - «Z. zool. Syst. Evolut.-forsch.», 11, 304-310.
FRACCARO M., LAUDANI U., MARCHI A. e TIEPOLO L. (1976) - «Chromosoma», 55, 27-36.
FRIZZI G. (1974 a) - «Scienzia Genetica», 111, 67-79.
FRIZZI G. (1947 b) - «Scienzia Genetica», 111, 80-88.
FRIZZI G. (1947 c) - «Nature», 160, 226.
FRIZZI G. (1953) - «Nature», 171, 1072.
HAGELE K. (1970) - «Chromosoma», 31, 91-138.
HEITZ E. (1934) - «Biol. Zentralbl.», 54, 588.
HENNIG W., HENNIG I. e STEIN H. (1970) - «Chromosoma», 32, 31-63.
KAUFMANN B. P. e IDDLES M. K. (1963) - «Port. Acta Biol.», Ser. A7, 225.
LA COUR L. (1941) - «Stain Technology», 16, 169-174.
NEWTON M. E., SOUTHERN D. I. e WOOD R. J. (1974) - «Chromosoma», 49, 41-49.
RIOUX J. A. (1958) - «Le Culicides», P. Lechevalier, Ed. Paris.
TIEPOLO L., DIAZ G. e LAUDANI U. (1974) - «Chromosoma», 45, 81-89.
Con il contributo del Ministero per i Beni e le Attività Culturali