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  • 1
    Electronic Resource
    Electronic Resource
    Giemsa C-banded karyotypes inCapsicum (Solanaceae) (1993)
    Springer
    Plant systematics and evolution 186 (1993), S. 213-229 
    Details
    ISSN: 1615-6110
    Keywords: Solanaceae ; Capsicum ; Karyosystematics ; Giemsa C-banding ; heterochromatin ; karyotype evolution
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: 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.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00940799
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  • 2
    Electronic Resource
    Electronic Resource
    Fluorescent chromosome banding in the cultivated species ofCapsicum (Solanaceae) (1996)
    Springer
    Plant systematics and evolution 202 (1996), S. 37-63 
    Details
    ISSN: 1615-6110
    Keywords: Solanaceae ; Capsicum ; Karyosystematics ; fluorochrome banding ; heterochromatin differentiation ; karyotype evolution
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: 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.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00985817
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    Paper (German National Licenses)
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