Giemsa C-banded karyotypes inCapsicum (Solanaceae) |
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Authors: | Eduardo A. Moscone Maria Lambrou Armando T. Hunziker Friedrich Ehrendorfer |
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Affiliation: | (1) Instituto Multidisciplinario de Biología Vegetal (IMBIV), Casilla de Correo 495, 5000 Córdoba, Argentina;(2) Institute of Botany and Botanical Garden of the University of Vienna, Rennweg 14, A-1030 Vienna, Austria |
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Abstract: | Giemsa C-banding is applied for the first time inCapsicum, allowing preliminary karyotype differentiation of six diploid species. Comparison of interphase nuclei and heterochromatic C-bands reveals striking differences between taxa and contributes to their taxonomic grouping. Therefore, C-banding appears to be a powerful tool for the cytogenetics and karyosystematics of the genus. Banding patterns are characterized by the omnipresence of centromeric bands and a variable number of smaller to larger distal bands, with the addition of intercalary bands in some cases. Satellites are always C-positive. Relationships between species and possible trends of karyotype evolution are discussed, with special reference to the origin of x = 13 from x = 12 and the increase of heterochromatin, regarded as advanced features.Chromosome studies inCapsicum (Solanaceae), III. For the first and the second part seeMoscone (1990, 1993). |
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Keywords: | Solanaceae Capsicum Karyosystematics Giemsa C-banding heterochromatin karyotype evolution |
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