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Fluorescent chromosome banding in the cultivated species ofCapsicum (Solanaceae)

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Abstract

Fluorochrome chromosome banding is applied for the first time to 15 samples of five cultivatedCapsicum species, all with 2n = 24, and allows a detailed analysis of the karyotypes (Tables 2–3, Fig. 8). Banding patterns differ between cytotypes, species and groups, reflecting the dynamics of chromosomal differentiation and evolutionary divergence. Taxa have from 1 to 4 NOR-bearing satellited chromosome pairs and exhibit increasing numbers of terminal (rarely intercalary and indistinct centromeric) heterochromatic fluorescent bands. Amounts of heterochromatin (expressed in % of karyotype length) increase from the group withC. annuum (1.80–2.88),C. chinense (3.91–5.52), andC. frutescens (5.55) toC. baccatum (7.30–7.56), and finally toC. pubescens (18.95). In all taxa CMA+DAPI—(GC-rich) constitutive heterochromatin dominates, onlyC. pubescens has an additional CMAo DAPI+ (AT-rich) band. The fluorochrome bands generally (but not completely) correspond to the Giemsa C-bands. Structural heterozygosity can be demonstrated but is not prominent. The independent origin of at least three evolutionary lines leading to the cultivated taxa ofCapsicum is supported.

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Authors and Affiliations

  1. Instituto Multidisciplinario de Biología Vegetal (IMBIV), Casilla de Correo 495, 5000, Córdoba, Argentina

    Eduardo A. Moscone

  2. Institute of Botany and Botanical Garden of the University of Vienna, Rennweg 14, A-1030, Vienna, Austria

    Maria Lambrou & Friedrich Ehrendorfer

Authors
  1. Eduardo A. Moscone
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  2. Maria Lambrou
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  3. Friedrich Ehrendorfer
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Additional information

Chromosome studies inCapsicum (Solanaceae), V. For the fourth part seeMoscone & al. 1995.

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Moscone, E.A., Lambrou, M. & Ehrendorfer, F. Fluorescent chromosome banding in the cultivated species ofCapsicum (Solanaceae). Pl Syst Evol 202, 37–63 (1996). https://doi.org/10.1007/BF00985817

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  • DOI: https://doi.org/10.1007/BF00985817

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