CYTOLOGIA
Online ISSN : 1348-7019
Print ISSN : 0011-4545
New Chromosome Numbers in Some Dioscorea Species
Franklin W. MartinSonia Ortiz
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1966 Volume 31 Issue 1 Pages 105-107

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Abstract

Chromosome numbers are reported for 15 species of Dioscorea and Rajania. All are multiples of the base number, 9. Three new cases are reported of both 36 and 54 chromosome plants in a single species. The possible modes of origin of hexaploids are discussed. Colchicine induced octoploids were used to synthesize 54 chromosome plants of D. floribunda. All such hexaploids were highly infertile. Guard cell lengths were correlated with level of ploidy and provided a rapid screening technique for finding higher polyploids.

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© The Japan Mendel Society
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