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

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Abstract

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.

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Acknowledgments

Maumita Bandyopadhyay acknowledges the Young Scientist Project, Science and Engineering Research Board, Department of Science and Technology, Government of India, for financial assistance. Authors acknowledge MTA with NBPGR and also thank Dr. K. S.Negi, NBPGR, Bhowali, for sampling Allium griffithianum plant material.

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  1. Centre of Advanced Studies, Department of Botany, University of Calcutta, 35, Ballygunge Circular Road, Kolkata, 700 019, India

    Mou Dutta & Maumita Bandyopadhyay

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  1. Mou Dutta
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  2. Maumita Bandyopadhyay
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Correspondence to Maumita Bandyopadhyay.

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Dutta, M., Bandyopadhyay, M. Karyomorphological study and report of B chromosome in Allium griffithianum Boiss. from India. Nucleus 57, 209–213 (2014). https://doi.org/10.1007/s13237-014-0119-7

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  • DOI: https://doi.org/10.1007/s13237-014-0119-7

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