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Analysis of the C-banded karyotype of Allium cepa L. Standard system of nomenclature and polymorphism

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Abstract

The C-banded karyotypes of three Allium cepa plants of different background are described. Identification of all chromosomes of Allium cepa is possible on the basis of complex telomeric and intercalary C-bands. A standard system of chromosome nomenclature is proposed. Infraspecific variation in heterochromatin amount per genome, number of intercalary bands per genome, relative area of telomeric bands, relative chromosome length, relative chromosome arm length and centromeric index are statistically analysed. Although extensive polymorphism in Allium cepa chromosomes is found especially with respect to the size of telomeric bands, the overall similarity of the karyotypes is obvious. The value of C-banding for biosystematics of cultivated plants related to Allium cepa and for their breeding is suggested.

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Authors and Affiliations

  1. Department of Plant Taxonomy (Cultivated Plants), Agricultural University, Haagsteeg 3, 6708 PM, Wageningen, The Netherlands

    E. R. Kalkman

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  1. E. R. Kalkman
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Kalkman, E.R. Analysis of the C-banded karyotype of Allium cepa L. Standard system of nomenclature and polymorphism. Genetica 65, 141–148 (1984). https://doi.org/10.1007/BF00135278

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  • DOI: https://doi.org/10.1007/BF00135278

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