Karyotype and chromosome number variation was observed in different ecotypes of Suaeda nudiflora, a mangrove associate collected from Bhitarkanika mangrove forest of Odisha, India. The chromosome number varied from 2n=36 to 54 and Ecopye IV from Gupti (2n=54) and Ecotype V from Ekakula (2n=40) with changes in karyotype was observed beside the normal diploid number 2n=23 in Ecotype-I (Dhamra), -II (Rajnagar) and –III (Dangmal). Investigation of RAPD profile among these ecotypes revealed genetic variation among the ecotypes. Some of the ecotype specific bands are obtained in Ecotype-IV like 100 bp in OPD- 12, 300bp in OPN15 and 1000bp in OPA05 are unique which can be used for developing SCAR markers for future use. Ecotype-V having 400bp in OPN-15, 500bp in OPA-14, 800bp in OPA-05 are found marker bands. While some of the monomorphic bands are common in all the ecotypes like 500pb in OPA-05 beside the marker bands of 600 bp and 1500 bp in OPA-14 in Ecotype-I are characteristics of the Ecotypes. Phylogenetic relationship and chromosome number and karyotype suggest the possible link of saline adaptability with ploidy changes of different ecotypes and subsequent changes in DNA profile rather than its epigenetic modifications in DNA level.
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