Population cytogenetic studies in natural
populations of Isoetes from Narsinghgarh (MP) have revealed the presence of
diploid plants of I. coromandelina exhibiting microsporogenesis to yield n=11 +
1 B chromosomes at anaphase I. This is hypothesized that I. coromandelina
served as amale parent and I. sampathkumarini offered n= 33 + 1 chromosomes as
female gamete thus resulting in to a natural hybrid x Isoetes pantil. Evidences
are presented In this paper to support this hypothesis.
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