Intergeneric hybrids of Saccharum

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Intergeneric hybrids of Saccharum: IV. Saccharum-Narenga

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Adaptive isochromosomes in Nicandra

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Triplo-polyploidy in Saccharum spontaneum L

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Polyploidy and vitamin C in Emblica officinalis gaertn

Emblica officinalis collected from various parts of India was found to have chromosome number 2n=98=14x and is therefore a much higher polyploid than the one reported on by Perry which is a tetraploid 2n=28. Cultivated forms of Emblica officinalis have variable numbers ranging from 2n=98 to 2n=104 and these have larger fruits. A comparative analysis of Vitamin C content of wild and cultivated varieties is given. Ascorbic acid content is found to be directly proportional to the size of the fruit and fruit size is correlated with the presence of a few extra chromosomes in the already high polyploid

Cytomorphological studies in autotetraploid Asparagus officinalis L

A comparative study of morphological and cytological characters of a diploid and artificially induced tetraploids Asparagus officinalis has been made. Vegetatively tetraploids are more vigorous than the diploids but cytologically they exhibit an unstable nature. A breakdown of tetraploidy has been noticed which was due to large number of irregularities in meiosis like quadrivalents, trivalents and univalents at metaphase and laggards and bridges at anaphase. In few cases multipolar spindle and nuclear breakdown was seen. Several PMC's showed reduced chromosome numbers probably due to chromosome elimination during the premeiotic division

The chromosome number of Cleome viscosa Linn

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