Figure 8-5. The origin of the amphidiploid (Raphanobrassica) formed from cabbage (Brassica) and radish (Raphanus).

Figure 8-5

The origin of the amphidiploid (Raphanobrassica) formed from cabbage (Brassica) and radish (Raphanus). The fertile amphidiploid arose in this case from spontaneous doubling in the 2n=18 sterile hybrid. Colchicine can be used to promote doubling. (From A. M. Srb, R. D. Owen, and R. S. Edgar, General Genetics, 2d ed. Copyright 1965 by W. H. Freeman and Company. After G. Karpechenko, Z. Indukt. Abst. Vererb. 48, 1928, 27.)

From: Changes in Chromosome Number

Cover of Modern Genetic Analysis
Modern Genetic Analysis.
Griffiths AJF, Gelbart WM, Miller JH, et al.
New York: W. H. Freeman; 1999.
Copyright © 1999, W. H. Freeman and Company.

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