Abstract
ONLY two out of a large number of colchicine-treated Annona squamosa plants reported earlier1 proved pure tetraploid on chromosome examination. The one suspected to be tetraploid on morphological grounds and reported in that paper to have borne fruits earlier than the control was found to be diploid. The two pure tetraploids have been under observation since 1951 but until now neither of them has borne any fruit although they come to blossom every year. The flowers on both these plants wither away on the day following their opening.
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References
Islam, A. S., Curr. Sci., 22, 118 (1953).
Elliott, F. C., “Plant Breeding and Cytogenetics”, 158 (McGraw-Hill Book Co., New York, 1958).
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ISLAM, A. Unproductivity in the Colchicine-induced Tetraploids of Annona squamosa L.. Nature 187, 343–344 (1960). https://doi.org/10.1038/187343a0
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DOI: https://doi.org/10.1038/187343a0
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