Abstract
DURING the course of our breeding programme with the introduced forage legume Glycine javanica L., a species with great potential over large areas of Queensland1,2, it was found that certain crosses between some of the most promising varieties failed to set seed. A cytological study showed that this was due to the presence of both diploid and tetraploid forms within the species, with chromosome numbers of 2n = 22 and 2n = 44 respectively (Table 1). The previously recorded number of 2n = 20 (ref. 3) is probably incorrect.
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References
Allan, G. H., Queensland Agric. J., 86, 273 (1960).
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Hermann, F. J., U.S. Dep. Agric. Tech. Bull., No. 1268 (1962).
Darlington, C. D., and Wylie, A. P., Chromosome Atlas of Flowering Plants (Allen and Unwin, London, 1955).
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PRITCHARD, A., WUTCH, J. Chromosome Numbers in the Genus Glycine L.. Nature 202, 322 (1964). https://doi.org/10.1038/202322a0
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DOI: https://doi.org/10.1038/202322a0
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