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Karyotypic characterization and constitutive heterochromatin in the grasshopper Stiphra robusta (Orthoptera
M J de Souza1, R de C de Moura
1Departamento de Genética, Universidade Federal de Pernambuco, Brasil.
Cytobios
|April 8, 2000
Abstract:
Conventional analysis, C-banding, silver nitrate and base specific fluorochrome staining with chromomycin A3 (CMA3) were used to analyse the meiotic chromosomes of the grasshopper Stiphra robusta. Diploid numbers of 2n = 19 in the males and 2n = 20 in the females were observed. The chromosome complement comprised a graded series of uniarmed chromosomes, and the X chromosome was medium sized. The nucleolar organizer regions, restricted to the bivalent chromosomes 6, 7 and 8, were CMA3 positive.