karyotypic evolution

Chromosome number variation and evolution in Neotropical Leguminoseae (Mimosoideae) from northeastern Brazil

E. C. X. R. Santos, Carvalho, R., Almeida, E. M., and Felix, L. P., Chromosome number variation and evolution in Neotropical Leguminoseae (Mimosoideae) from northeastern Brazil, vol. 11, pp. 2451-2475, 2012.

Most members of the subfamily Mimosoideae have pantropical distributions, variable habits, and a basic chromosome number x = 13. We examined karyotypic evolution of 27 species of this subfamily occurring principally in northeastern Brazil by examining chromosomes stained with Giemsa. All of the species had semi-reticulated interphase nuclei and early condensing segments in the proximal region of both chromosome arms.

Karyotypic variability in Iheringichthys labrosus (Teleostei, Pimelodidae) from the Tibagi River basin (Paraná State, Brazil)

L. B. Ribeiro, Matoso, D. A., Almeida, M. C., Vicari, M. R., Moraes-Neto, A., Svidnicki, M. C. C. M., and Artoni, R. F., Karyotypic variability in Iheringichthys labrosus (Teleostei, Pimelodidae) from the Tibagi River basin (Paraná State, Brazil), vol. 7, pp. 718-724, 2008.

Cytogenetic analyses were carried out in a populational sample of Iheringichthys labrosus from the Guaraúna River (Upper Tibagi River; Paraná State, Brazil) in order to provide a karyotypic comparison with another previously studied population from the Lower Tibagi River, characterized by the presence of 32m + 8sm + 6st + 10a (2n = 56, FN = 102) and occurrence of supernumerary chromosomes (80% of individuals). The 17 specimens of I.

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