Karyotypic characterization and constitutive heterochromatin in the grasshopper Stiphra robusta (Orthoptera proscopiidae) |
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Authors: | de Souza M J de Moura R de C |
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Affiliation: | Departamento de Genética, Universidade Federal de Pernambuco, Brasil. |
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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. |
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