Abstract
THE examination of meristems in root tips and young ovules in the c2-generation bushes grown from seed of colchicine-induced tetraploid Ribes nigrum (2n = 32) showed that the chromosome number varies greatly from one to another. The lowest number found was 4, all numbers between 4 and 32 being observed. Statistics on the frequency of the different chromosome numbers shows that the distribution is in its main features binomial, the peak lying at the diploid number 2n = 16. All numbers divisible by four are more frequent than might be expected on random distribution.
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VAARAMA, A. Cryptic Polyploidy and Variation of Chromosome Number in Ribes nigrum. Nature 162, 782 (1948). https://doi.org/10.1038/162782a0
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DOI: https://doi.org/10.1038/162782a0
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