2010 Fiscal Year Final Research Report

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

Research Project

Project/Area Number	20770064
Research Category	Grant-in-Aid for Young Scientists (B)
Allocation Type	Single-year Grants
Research Field	Biodiversity/Systematics
Research Institution	Niigata University
Principal Investigator	UWAI Shinya Niigata University, 自然科学系, 准教授 (00437500)
Project Period (FY)	2008 – 2010
Keywords	種分化 / 藻類
Research Abstract	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.