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Presence and Behaviour of B-Chromosomes in Acanthophyllum Laxiusculum (Caryophyllaceae)

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Abstract

Two karyotypic variants were recognized in populations of Acanthophyllum laxiusculum Schiman-Czeika. Variant A had 2N = 30 and variant B showed the presence of 0 to 3 B-chromosomes in addition to 2N = 30 chromosomes. Analysis of chromosome behaviour at meiosis showed that the presence of B-chromosomes increases chiasma frequency in A-chromosomes; this effect was higher for plants with odd numbers of B-chromosomes compared with plants with even numbers of B-chromosomes. Comparisons of variants A and B, suggests that B-chromosomes have an effect pollen stainability and seed production. It seems that the presence of B-chromosomes may increase pollen stainability and seed production in variant B.

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Authors and Affiliations

  1. Institute of Biochemistry & Biophysics, University of Tehran, P.O. Box 13145-1384, Tehran, Iran (Phone

    S.M. Ghaffari

  2. Department of Biology, Faculty of Science, University of Razi, Kermansha, Iran

    A. Bidmeshkipoor

Authors
  1. S.M. Ghaffari
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  2. A. Bidmeshkipoor
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Ghaffari, S., Bidmeshkipoor, A. Presence and Behaviour of B-Chromosomes in Acanthophyllum Laxiusculum (Caryophyllaceae). Genetica 115, 319–323 (2002). https://doi.org/10.1023/A:1020676119886

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