Chromosomal Elimination in Natural Populations of Ophioglossum

Abstract

Followings are other important observations:
1. Occurrence of supernumerary chromosomes of very small size (1.4μ); i.e. microchromosomes are recorded in O. nudicaule, O. gramineum, O. sp. and O. thermale.
2. A peculiar phenomenon of linear attachment of bivalents i.e., interchromosomal connections is observed for the first time in Ophioglossum.
3. Plants of O. thermale growing intermixed with O. sp. are characterised by ca. 360 bivalents, which is a new count for the species.