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The Japanese Journal of Genetics
Vol. 58 (1983) No. 6 P 613-616



The chromosomes of the Japanese weevil, Catapionus gracilicornis Roelofs have been investigated in Aomori Prefecture. Both hexaploid (6x=63) and decaploid (10x=100) parthenogenetic races were found in Temma. The species is now known to have six parthenogenetic races, 2x, 3x, 4x, 5x, 6x, and 10x, as well as a diploid bisexual race. It was shown that pentaploid forms arose from hexaploid forms as I stated in 1980.

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