Genetic differentiation and Temperature requirement for maturation in Undaria pinnatifida (Phaeophyceae)

利用线粒体和核SSR分子标记分析了北方裙带菜野生居群的遗传分化。结果表明，从北到南，从小滨、十王、大原井、铫子、胜浦5个居群中各收集30-50株植株，其中小滨居群分化程度较高，SSR标记Fst值为0.46-0.56。Onahama群体的线粒体单倍型与其他群体不相同，但某些SSR等位基因在Onahama、Ju-Oh和Oharai群体中是共同的。这些结果表明，基于线粒体标记的遗传结构可以在核标记中观察到，并且该卵受精物种的基因流可能是通过雄配子而不是雌配子和游动孢子进行的。

Genetic differentiation among the wild populations of Undaria pinnatifida (Phaeophyceae) was analyzed using mitochondrial and nuclear SSR markers in northern Kanto. 30-50 plants were collected from each of five populations (Onahama, Ju-oh, Oharai, Choshi, Katsu-ura ; north to south), among which the Onahama population was highly differentiated with the Fst values of 0.46-0.56 in SSR. Any mitochondrial haplotypes of the Onahama population were not shared with other populations, but some alleles of SSRs were common among Onahama, Ju-Oh and Oharai. These results suggests that the genetic structure reported based on the mitochondrial marker could be observed in nuclear markers, and that the gene-flow of this oogamous species might be occurred by male gametes rather than the female gametes and zoospores.