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F 3 -F 8 hybrids of red crucian carp (Carassius auratus red var.) (♀)xcommon carp (Cyprinus carpio L.) (♂) were found to be allotetraploids by examining the numbers and karyotypes of chromosomes, the DNA content of red blood cells, and the mean nuclear erythrocyte volumes. The chromosome numbers of F 3 -F 8 were 4n=200. The chromosome numbers of two types of triploids...
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