Karyomorphological study and report of B chromosome in Allium griffithianum Boiss. from India

The chromosomal characteristics of Allium L. have intrigued scientists on account of variation in basic chromosome number (x) ranging from 8 to 11, occurrence of polyploidy and presence of B chromosomes. The present study provides karyotypic details Allium griffithianum and presence of B chromosome...

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Bibliographic Details
Published in:Nucleus (Calcutta) 2014-12, Vol.57 (3), p.209-213
Main Authors: Dutta, Mou, Bandyopadhyay, Maumita
Format: Article
Language:English
Subjects:
Allium
Biomedical and Life Sciences
Cell Biology
chromosome number
chromosomes
karyotyping
Life Sciences
metaphase
mitosis
Original Article
polyploidy
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Summary:The chromosomal characteristics of Allium L. have intrigued scientists on account of variation in basic chromosome number (x) ranging from 8 to 11, occurrence of polyploidy and presence of B chromosomes. The present study provides karyotypic details Allium griffithianum and presence of B chromosome in the species, the being a first report. The root-tip mitosis in this species showed presence 16 chromosomes, but 30 % of cells also showed occurrence of an additional B chromosome. The chromosome size ranged from 8.45 μm to 18.46 μm. The B chromosome size ranged between 2.4 and 2.7 μm in the mitotic metaphase plates. The mean karyotype formula was deduced to be 4.5 M + 7.5 m + 1sm + 1st +2 m (SAT) + 1B.
ISSN:0029-568X
0976-7975
DOI:10.1007/s13237-014-0119-7