Indian Society of Genetics & Plant Breeding

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Karyotype characterization of Turkish taxa of the genus Asperula L. - section Thlipthisa (Rubiaceae)

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Karyotype studies were performed in five taxas of Asperula
viz
., Asperula brevifolia, A. pseudochlorantha var.
pseudochlorantha, A. pseudochlorantha var. antalyensis,
A. serotina and A. purpurea subsp. apiculata from the
section Thlipthisa, and their diploid (2n), and the basic (x)
chromosome numbers were determined as 2n=22 and
x=11, respectively. Chromosome length varied from 0.80
µm (A. serotina) to 2.40µm (A. brevifolia). Chromosomes
are principally metacentric except for A serotina, which
has submetacentric chromosomes. A. serotina showed the
highest intrachromosomal assymetry coefficient (A1) index
and A. pseudochlorantha var. antalyensis represented the
highest interchromosomal asymmetry coefficient (A2). The
chromosome numbers of A. brevifolia, A. serotina and A.
purpurea subsp. apiculata were reported for the first time.
 

Keywords: Asperula, chromosome, karyology, rubiaceae

Info

Year: 2011
Volume: 71
Issue: 1
Article DOI: N/A
Print ISSN: 0019-5200
Online ISSN: 0975-6906

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