Biosystematic studies on the genusIsoetes in Japan I. Variations of the somatic chromosome numbers

@article{Takamiya1994BiosystematicSO,
  title={Biosystematic studies on the genusIsoetes in Japan I. Variations of the somatic chromosome numbers},
  author={Masayuki Takamiya and Mitsuru Watanabe and Kanji Ono},
  journal={Journal of Plant Research},
  year={1994},
  volume={107},
  pages={289-297}
}
The somatic chromosome number of three Japanese species ofIsoetes, I. asiatica, I. japonica andI. sinensis, was determined in 199 individuals from 49 populations. The chromosome number ofI. asiatica was 2n=22, confirming previous reports. However,I. japonica andI. sinensis displayed a diversity in chromosome number. Six cytotypes, 2n=66, 67, 77, 87, 88 and 89, were found inI. japonica; 2n=67, 87, 88 and 89 are new counts in the genusIsoetes. The plants with 2n=66 were the most frequent (72% of… CONTINUE READING

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