New cytogenetic information on Allium iranicum (Alliaceae) from Iran |
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Authors: | Seyed Mahmood Ghaffari |
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Institution: | (1) Institute of Biochemistry and Biophysics, University of Tehran, PO Box 13145-1384, Tehran, Iran |
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Abstract: | Karyotype analysis and chromosome behaviour in tetraploid Allium iranicum is reported. The somatic karyotype 2n = 32, consists of 12 pairs of metacentric chromosomes, two pairs of submetacentric chromosomes and two pairs of submetacentric
satellite chromosomes. Chromosome complement follows two sets of 16 pairs of homologous chromosomes. A detailed analysis of
Pachytene, Diplotene and Metaphase I of meiosis in pollen mother cells in this taxon showed that the most common chromosome
configurations were bivalents at all subphases mentioned. It is concluded that A. iranicum is most likely a natural allotetraploid and certainly differs from related species A. ampeloprasum, A. commutatum and A. porrum. |
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Keywords: | Allium iranicum allotetraploid chiasmata chromosome pairing Iran karyotype meiosis |
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