1998•CYTOLOGIAOpen access

Behaviour of B-Chromosomes in Centaurea kandavanensis Wagenitz.

Seyed Mahmood Ghaffari

Abstract

Karyotype analysis and behaviour of B-chromosomes at meiosis in Centaurea kandavanensis are reported. The number of B-chromosomes was 0 to 3 in both somatic and gametic cells. The somatic karyotype consisted of eight metacentric pairs, two submetacentric pairs and 0-3B-submetacentric chromosomes. Analysis of chromosome behaviour at meiosis showed that the increase of number of B-chromosomes increased the mean chiasma frequency of A-chromosomes in pollen mother cells.

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Key concepts: Biology, Chiasma, Meiosis, Karyotype, Somatic cell, B chromosome, Genetics, Chromosome