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Chromosome conspectus of Kashmir Himalayan species of the genus Potamogeton L.

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Abstract

The present study represents an original investigation on the chromosome number and meiotic behaviour of eleven Potamogeton species inhabiting lotic and lentic freshwater bodies in the Kashmir Himalaya. The chromosome number of P. berchtoldii (2n = 4x = 28), P. crispus (2n = 12x = 84) recorded during the present study differed from earlier reports, while chromosome count for P. amblyphyllus (= Stuckenia amblyphyla) is newly reported for the genus. In P. natans two cytotypes were identified: tetraploid (2n = 4x = 52) and octoploid (2n = 8x = 104), the latter being the first report. The species characterized by abnormal anaphasic segregation also had low pollen fertility and fruit set. The present study also correlates base number and ploidy level with leaf habit, pollination efficiency and fruit set.

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Acknowledgements

We are highly thankful to the Head, Department of Botany, University of Kashmir, Srinagar, for providing necessary facilities. We also greatly acknowledge the kind help of Dr. Zdenek Kaplan, Institute of Botany, Academy of Science of Czech Republic, who authenticated the identification of some plant specimens.

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Correspondence to Aijaz Hassan Ganie.

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Ganie, A.H., Reshi, Z.A. & Wafai, B.A. Chromosome conspectus of Kashmir Himalayan species of the genus Potamogeton L.. Trop Ecol 61, 345–359 (2020). https://doi.org/10.1007/s42965-020-00094-6

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