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Chromosome cytology and karyotype change inGalaxia (Iridaceae)

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Abstract

Basic chromosome number inGalaxia is believed to be x = 9, and this number, or multiples, occurs in all species of subgenusGalaxia. In subgenusEurystigma, G. barnardii has n = 8,G. versicolor n = 8 and 7,G. citrina n = 8, 7 and 17 whileG. variabilis has n = 7 exclusively. Karyotypes in forms ofG. versicolor with n = 7 and inG. variabilis are quite different and clearly originated independently. Karyotypic features provide evidence for the hypothesis that changes in chromosome number were accomplished through chromosome fusion either by classical Robertsonian translocation, or unequal reciprocal translocation.

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  1. B. A. Krukoff Curator of African Botany, 2345 Tower Grove Ave., 63110, St. Louis, MO, USA

    Peter Goldblatt

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  1. Peter Goldblatt
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Goldblatt, P. Chromosome cytology and karyotype change inGalaxia (Iridaceae). Pl Syst Evol 133, 61–69 (1979). https://doi.org/10.1007/BF00985879

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  • DOI: https://doi.org/10.1007/BF00985879

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