STUDY ON THE INTER-AND INTER-POPULATIONAL GENETIC VARIABILITIES OF ENDEMIC MOSS SPECIES

本研究中，作者指出以下问题：（1）日本和马来西亚的特有种Takakia lepidozioides，生活在高海拔地区，在种群内和种群间的遗传变异很低。有趣的是，我们可以在Takakia lepidozioides中检测到种群内的遗传变异，即使很低，因为该物种仅以雄性植物而闻名，因此它不能有性繁殖。此外，一个植物收集在山。京那巴鲁在pgm2中显示基因重复。(2)我们研究了另外三种低地植物。这些物种在种群内和种群间也表现出较低的遗传变异。而里恰属各居群间的遗传差异较大。从外部形态上观察，发现里恰属有两个以上的隐种，并据此计算了居群间的假高遗传差异。

In this study, the author can point out the following issues ;(1) endemic species, Takakia lepidozioides, inhabiting high altitude places, has rather low genetic variabilities within and among populations in Japan and Malaysia. It is interesting that we can detect genetic variablity within population, even if very low, in Takakia lepidozioides, because this species is only known for male plants, and therefore it can not reproduce sexually. In addition, one plants collected at Mt. Kinabalu shows gene duplication in pgm2.(2) we studied other three lowland species which growing vegetatively. These species also show low genetic variabilities within and among populations. Riccia fluitans, however, show high genetic difference among population. Examing its outer morphology, we can detect more than two cryptic species in Riccia fluitans, and by this reason the false high genetic difference among populations were caluculated.