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doi: 10.1038/166238a0
pmid: 15439259
IN 1948, Prof. G. Haggqvist1 reported the production of tetraploid frogs (Rana temporaria) by colchicine treatment at fertilization, all previous workers having been unsuccessful. Chromosome counts were not made. Instead, tetraploidy was inferred from the relatively greater volume of epidermal nuclei of some treated animals as compared with controls (ratio 1 : 1.87, the theoretical ratio for tetraploidy being 1 : 2.00).
Polyploidy, Genetics, Animals, Rabbits, Chromosomes
Polyploidy, Genetics, Animals, Rabbits, Chromosomes
citations This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically). | 9 | |
popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network. | Average | |
influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically). | Top 10% | |
impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network. | Average |