Nelumbo - The Bulletin of the Botanical Survey of India

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One species and eight horticultural varieties of Amaryllis show a basic number of x=11, which is the predominant basic number of the family. In both Amaryllis belladonna and Amaryllis-Mrs. Garfield the normal somatic number is 2n=22. All the seven colour varieties of Amaryllis-Giant Dutch have 2n=44 chromosomes. These varieties differ from one another in the minor alterations of the chromosome types suggesting the role of minor structural alterations in evolution. In addition to the normal somatic complement a number of variant nuclei with altered karyotypes have been recorded.
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