A NEW LINE OF CHROMOSOMAL EVOLUTION IN ISOETES

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Published: 1990-01-12

Page: 45-53


INDIRA BHU *

Department of Genetics, Bhopal University, Bhopal, M. P., India

H. K. GOSWAMI *

Department of Genetics, Bhopal University, Bhopal, M. P., India

*Author to whom correspondence should be addressed.


Abstract

Based on plants which exhibit a series of multiples of n = 12 chromosomes, a new line of chromosomal evolution has been suggested. The possible origin of this series of 12, besides of n = 10 and n = 11 has been suggested due to the instance of chromosomal fission at an early phase of evolution.  Role of chromosomes with enough heterochromatin is understood to play a key role in this mechanism.

I. muricata is reported from Bhopal, India, inhabiting similar moist grassy rocks as reported from Australia. Root tip mitosis has shown 2n = 60 chromosomes which is a new count for this species. I. pantii has shown three cytotypes with 2n=24 (15)% ,2n = 36 (60% plants) and 2n = 48 (25% plants) chromosomes. Another species partly resembling I. pantii possesses 2n = 72 chromosomes.


How to Cite

BHU, I., & GOSWAMI, H. K. (1990). A NEW LINE OF CHROMOSOMAL EVOLUTION IN ISOETES. BIONATURE, 10(1 & 2), 45–53. Retrieved from https://globalpresshub.com/index.php/BN/article/view/306

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