Fundamental Study of Population Genetics of Magngrove Tree Species in Ryukyu Islands.

“红树林”这个词通常指的是生长在潮间带和热带、亚热带河口的组成植物。因此，“红树林”包括一百多种植物。红树林，即红树林植物，广泛分布于热带、亚热带的潮间带和河口。琉球群岛由于地理位置接近分布的北界，红树林只有7个主要成分分布，有关红树林的研究多集中在生态学、植物分类学、营林栽培等领域，对红树林的遗传学研究较少。本研究试图获得分布于琉球群岛的一些红树树种的种群遗传学并探讨其应用的可能性。为了分析红树林的遗传多样性，采用了不连续的垂直平板凝胶电泳法，并对这些方法进行了成功的…修改更适用于红树林。对16种酶进行了试染，木本植物和秋茄共获得了11种酶，其中10种为海鞘根霉。共检测到两个木霉磷酸葡萄糖变位酶基因座，其中5个为可疑等位基因。比较了冲绳群岛、石垣岛和伊里奥莫特岛的4个种群的木霉遗传成分。它们的组成是不同的，但差异与它们之间的地形距离有关。利用分布在伊里奥莫特岛雅什河沿岸的229只秋茄个体的过氧化物酶表型进行亲缘关系分析，清楚地解释了这些胎生种子的扩散动态。对琉球群岛红树林的更多的酶种类、个体和地点进行更详细的研究，因为这是日本第一次进行遗传多样性和种群遗传学的研究。较少

The word "mangrove" usually points out constituent plants growing in the intertidal zones and the estuaries in tropics and sub-tropics. Therefore, "mangrove" includes more than one hundred plant species. Mangroves, that means mangrove plant species, are widely distributed in intertidal zones and estuaries in tropics and sub-tropics. Only seven major components of mangroves are distributed in Ryukyu islands, because the location of the islands is near the northern limit of their distributions.The most of studies concerning with mangroves have been done in the fields of ecology, plant taxonomy, silviculture and so on, but few in the genetical studies. An attempt of this study was made to get and to examine the possibility of application of population genetics of some mangrove tree species distributing in Ryukyu islands. For the analysis of genetic diversities of mangroves, the methods of electrophoresis with discontinuous, vertical slab gel were applied, then those were modified successf … More ully to apply to mangroves. 16 enzyme species were tries to stain, but 11 zymogrames of 16 enzyme species were gotten for Bruguiera gymnorrhiza and Kandelia candel, and 10 of those were gotten for Rhizophora stylosa. Two phosphoglucomutase loci of B. gymnorrhiza were detected, and five alleles of those two loci were suspected. Genetic components of B. gymnorrhiza were compared among four populations, one in Okinawa islands, one in Ishigaki island and two in Iriomote island. The components of those were different, but the differentiations correlated with topographic distances among them. Kin-ship analysis of K. candel were carried out for using peroxidase phenotypes of 229 individuals distributing along Yashi river in Iriomote island, then dispersion dynamics of those viviparous seeds were clearly explained. More detailed studies should be carrried out with analysis of many more enzyme species, individuals and sites of mangroves in Ryukyu islands, because this study is the first one of the genetic diversities and population genetics in Japan. Less